JPH11190021A - Joint construction for pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint constriction for pile having a sufficient durability against impact for axial tension force and being capable of obtaining a high torque transmitting force in rotating direction. SOLUTION: This joint construction comprises a pair of joint blocks 12 respectively fixed to the joint surfaces of the end portion of pile 10. Each joint block 12 is located at the inner side of a substrate 14 seated at the pipe end face, an outer peripheral portion 16 raised in one united body from the peripheral edge of the substrate 14 with a semi-spherical shape, and the outer peripheral wall portion 16 and comprises a cylindrical portion 18 raised in one united body from the substrate with a rising dimension half of the above, a projected stripe 20 stuck out and formed in the upper inner periphery of an outer peripheral wall portion 16, and a recessed groove 22 formed in a peripheral shape around the outer periphery with half periphery exposed of the cylindrical portion 18. In a state where the joint blocks 12 are lapped together, end faces of the cylindrical portion 18 are butted each other, outer peripheral wall portions 16 have a hook shape and linked in a direction of whirl-stop, and a projected stripe 20 and a recessed groove 22 facing each other are linked and coupled in axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure such as a steel pipe pile, a concrete pile, a circular steel pipe column, a square steel pipe column (including a rectangular steel pipe column), and the like, particularly to an axial force direction and a rotation direction. The present invention relates to a joint structure having excellent torque transmission force.

[0002]

2. Description of the Related Art When a steel pipe pile and a concrete pile are built underground, a construction method shown in FIG. 35 is generally employed. In the illustrated construction method, the lower pile 2 is ground E by applying a striking force and a rotating force to the pile head of the lower pile 2 while sequentially lowering the hammer head 1a of the pile driver 1 along the guide 1b.
Then, the second pile 4 is suspended by the crawler crane 3 and its tip is connected to the pile head of the lower pile 2 exposed on the ground surface. 4
And work for placing the second pile 4 is performed.

[0003] By repeating the same operation one after another, a plurality of piles are connected to each other and are built up to a predetermined underground depth.

Conventionally, the connection structure of the connection portion 5 between the piles 2 and 4 is made of steel material which has been previously welded on site in the case of a steel pipe pile or in the case of a concrete pile, which has been previously integrated vertically. The end plates were also fixed by field welding, but all required field welding technicians, the welding work was affected by the weather, etc., and it was not necessarily a reliable joint structure.

In order to solve such problems, various types of weldless joint structures have been developed. Among them, a typical joint structure of a concrete pile is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-259082.

The technique described in this publication is composed of a pair of half-split inner rings which are fitted to the outer periphery of an end plate of a concrete pile in an uneven shape, and an outer ring which is taperedly engaged with the inner rings. The inner ring is engaged with the outer periphery of the end plate in a state where the outer ring is joined up and down, and then the outer ring that has been passed through the outer periphery of one of the piles is fitted into the outer side of the inner ring and moved in the taper direction, This structure connects the upper and lower piles by contracting the inner ring to a tight fit.

In the case of steel pipe piles, for example,
As shown in JP-A-119132, a pair of half-shaped inner rings meshing with the irregularities are formed by forming irregularities on the upper and lower peripheries of the pile, or integrating the members having the irregularities.
And a joint structure similar to the above-described joint structure of a concrete pile provided with an outer ring in which the inner ring is fitted tightly, or as shown in JP-A-9-143987, In addition to the disclosed joint structure including a joint ring that engages in a shape and a bolt that tightly couples both ends of the joint ring in a crimped state, and those in which these shrink coupling structures are slightly improved Are variously disclosed.

[0008]

However, the above-mentioned various types of welded joint structures have the following problems.

First, in any joint structure, the outer periphery of the joint between the piles is a basic structure in which the outer periphery of the joint is crimped by a ring, and is received from the hammer head 1a by the percussion movement of the hammer head 1a. The impact load per stroke is actually extremely large, so if the ring is not firmly fitted, the ring will fall off due to its cumulative impact load and additionally the penetration resistance of the pile into the ground There was a fear.

As described above, various small improvement techniques have been developed in order to prevent the detachment, but none of them has a sufficient drop-preventing effect despite the complexity of the mechanism.

Next, recently, in order to reduce the pile driving work in addition to the quietness of the construction, the pile driving machine 1 imparts not only the percussion movement but also the rotation movement to the hammer head 1a, and the rotation force is applied to the pile. While performing the driving work.

On the other hand, in each of the joint structures described above, although the coupling in the axial direction is taken into consideration, the torque transmission force in the rotational direction is not taken into consideration at all, and the pile has a high penetration resistance to the underground. In this case, a slip may occur between the joints, and the rotational torque of the upper pile may not be transmitted to the lower pile at all. In this case, the driving efficiency may be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide sufficient durability against an impact in an axial force direction and to obtain a high torque transmission force in a rotational direction. The present invention provides a joint structure for a pile.

[0014]

In order to achieve the above object, the present invention comprises a pair of joint blocks respectively fixed to a joint surface of a pile end, wherein each of the joint blocks is a substrate seated on the pile end surface. And an outer peripheral wall portion formed upright in a semicircular shape from the peripheral edge of the substrate, and a tubular portion inside the outer peripheral wall portion and formed upright from the substrate with a half of the rising dimension, A ridge formed in a circular shape on one of an outer peripheral portion exposed at an upper inner periphery of the outer peripheral wall portion and a half periphery of the cylindrical portion;
On the other hand, the end faces of the cylindrical portions are abutted with each other in a state where the joint blocks are overlapped with each other, and the outer peripheral wall portions are hooked to each other in the direction of stopping in the rotation stopping direction. The protrusions and the grooves are engaged with each other and connected in the axial direction.

According to the present invention, in the present invention, a strong connection is maintained by the concave and convex fitting in the axial direction, and a hook-shaped engagement between the outer peripheral walls is provided in the rotational direction.
The rotational moment is transmitted.

Further, in the present invention, since a plurality of bolt holes penetrating the outer peripheral wall portion and the counterpart cylindrical portion facing the outer wall portion are formed, the joint blocks are connected by bolt connection. A stronger connection can be achieved as compared with a simple friction ring system.

Further, according to the present invention, a guide hole is formed at a position where the outer peripheral wall portion and a counterpart cylindrical portion facing the outer peripheral wall portion are fitted to each other in a lateral direction, and the outer peripheral wall portion is inserted into the guide hole to form the outer peripheral wall portion. The positioning pin for the fitting guide for aligning the two guide holes is provided by rotating the guide hole.

In this way, when the upper pile is hung on the lower pile for positioning and joining, the pin is inserted and turned to search for the guide hole of the other party, and when they match, the pin is inserted into the guide hole of the other party. If it is inserted, the fitting is completed by laterally moving the pin as a guide, so that the installation positioning work is simplified.

Further, in the present invention, since the top surface of the cylindrical portion is set to an inclined surface which becomes lower toward the lateral insertion side, it is possible to simplify the lateral movement operation.

[0020] In addition, the reinforcing plate at the outer periphery of the bolt connection position can reinforce the bolt connection position.

Further, by making the joint block a cylindrical cross section, it can be adapted to a columnar pile, and by making it a prismatic type, it can be adapted to a prismatic pile.

Next, in the present invention, it is also possible to adopt a structure having a fastening ring that is inserted into the outer peripheral portions of the joint blocks in a state where the joint blocks are overlapped with each other and fastens the joint blocks together in a tight fit state.

In this case, the tightening ring is loosely fitted to the outer periphery of both joint blocks, reduced in diameter by an appropriate fastening means, and fastened to the outer periphery of both joint blocks by crimping. Can be. The fastening means in this case may be an insertion plate which is inserted between the outer periphery of both joint blocks and the tightening ring and tightens the both, and the tightening ring is wound around the outer periphery of both joint blocks. The tightening means may move the wound end of the tightening ring in the circumferential direction to contract.

[0024]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, since there are many embodiments below and a large number of reference drawings, for simplification of description, titles are attached to related items such as each embodiment and its modified examples or additional matters at the beginning, and reference is made. The description will be made separately for each item together with the figure number.

In each of the embodiments, the same or corresponding parts are designated by the same reference numerals as those used in the first embodiment. Description will be made using only different reference numerals for components and newly added components.

[First Embodiment] See FIGS. 1 to 5 In FIG. 1, a lower and upper pile 1 made of a cylindrical steel pipe is shown.
A joint block 12 according to the present invention is fixed to the pile heads 0 and 10 by welding or the like. FIGS. 3 and 4 show an example in which the projections formed on the joint block 12 are fitted into the inside of the piles 10 and welded. It can also be welded.

The two joint blocks 12 are of exactly the same shape made of steel, are flange-connected to the upper and lower open ends of each of the piles 10, and have a disc-shaped substrate 14 having the same diameter as the pile 10 to be joined by welding. And an outer peripheral wall portion 16 which is integrally formed in a semi-circular shape on the outer periphery of the outer peripheral wall portion, and is integrally formed on the substrate 14 on the inner peripheral side of the outer peripheral wall portion 16 with a half of the rising dimension. A raised cylindrical portion 18, a convex ridge 20 formed in a circular shape on the inner periphery of the upper portion of the outer peripheral wall portion 16,
It is basically composed of a concave groove 22 formed on an outer peripheral portion of the cylindrical portion 18 that is exposed half a circumference.

A pair of bolt holes 24 are respectively opened through the inside and outside of the outer peripheral wall portion 16 at the upper ends of the notches facing substantially 180 °.
A pair of bolt holes 26 corresponding to the bolt holes 24 in an overlapped state are opened on the lower side of the tubular portion 18 of the joint block 12 facing the other and facing each other.

Further, the bolt holes 24 and 26 and approximately 90
At the orthogonal position, the lateral guide holes 28, 30 penetrating inside and outside of the upper part of the outer peripheral wall part 16 and the lower part of the cylindrical part 18 are provided.
Are formed.

[Positioning and connection procedure]... See FIG. 2 First, as shown in FIG. 2A, a crawler crane corresponding to the lower pile 10 exposed on the ground surface (see FIG. 35).
The upper pile 10 is suspended by, for example, and the upper pile 10 is rotated and positioned so that the opposing outer peripheral walls 16 face each other. In this state, the two piles 10 are not on the same axis, and the upper pile 10 is shifted laterally so that the upper outer peripheral wall 16 is seated on the lower substrate 14 as shown in FIG. In this state, the upper pile 10 is still suspended, and all loads are not applied.

Next, a positioning pin 32 is inserted into a guide hole 28 formed in each outer peripheral wall 16, and the pin 32 is rotated to rotate the upper stake 10, while the guide hole formed in the cylindrical portion 18 at the tip of the pin. Search for 30.

Then, after the pin 32 is inserted into the guide hole 30, that is, after the positioning in the lateral direction is performed,
As shown in (c), a binding member 34 such as a wire or a chain is wound around the outer peripheral walls 16, and at a crossing position, a tightening tool 36 commonly called “gatcher” is reciprocally rotated to operate on the upper side. The outer peripheral wall 16 is brought closer to the lower outer peripheral wall 16.

With this operation, when the outer peripheral walls 16 are completely engaged with each other in a hook shape, the bolt holes 24 and 26 coincide with each other. If the bolt 38 is screwed into each position as shown in FIG. The joint blocks 12 are connected to each other,
The connection operation is completed with the center axes of the two completely aligned.

Thereafter, the tightening member 36 is loosened to release the binding material 34.
If it is removed, the wire of the crawler crane is hung, and it is set in the pile driving machine, it will be in the pile driving standby state.

FIG. 3 shows a completely joined state of the two joint blocks 12 after the above operation is completed. In the figure, the upper and lower tubular portions 1
The end faces of 8 are completely coincident with each other, and the ridges 20 formed on the outer peripheral wall 16 are engaged with the concave grooves 22 of the counterpart cylindrical portion 18 to prevent slipping in the axial direction. Further, with respect to the rotation direction, the outer peripheral walls 16 receive a rotational moment by engaging with each other in a hook shape, and exert the same function as the shaft coupling of the machine element.

When it is necessary to reinforce or stop water, it is preferable to attach or apply a water-stopping material to at least one of the ridge 20 and the groove 22. Further, for the same purpose, a reinforcing plate can be welded over a joint between the joint blocks 12 and 12 located above and below (it is possible to attach or apply a waterproof material to the inside of the reinforcing plate. preferable).

[Modification] See FIG. 4 In FIG. 4, the end surface of the cylindrical portion 18 is set to have an inclination θ that becomes lower toward the inner side of the outer peripheral wall 18. This inclination θ
The inclination θ during the lateral movement operation shown in FIG.
In addition to slipping, the moving operation can be further simplified, and it also has a function of preventing slippage after joining. This inclination θ produces a height difference of about 2 to 3 mm between the upper and lower piles, for example.

The joint block 12 described above is integrated with both ends of the pile 10 by a welding process controlled in advance before shipment from the factory. Also, in welding, it is possible to perform good superposition by hanging the rods at opposite positions at the casting site without strictly specifying the mounting position and direction.

[Pile hitting jig at the time of hitting] See FIG. 5 When the upper joint block 12 of the pile 10 is repeatedly hit directly by a hammer head, the hitting portion is deformed, and the positioning connection thereafter is performed. Work may be hindered.

In preparation for such a case, FIG.
A striking head 40 as shown in (b) is prepared as an additional component, and is used repeatedly for each striking operation. The striking head 40 is used by being put on the joint block 12 on the pile top side, and has a shape similar to the joint block 12,
A detent portion 44 which is integrally suspended from a lower portion of the solid impact head 42 and engages with the outer peripheral wall portion 16 in a hook shape, and which is inside the detent portion 44 and protrudes to a lower portion of the impact head 42; It comprises a solid pressing portion 46 joined to the cylindrical portion 18.

Therefore, at the time of pile driving, the impact force of the hammer head is indirectly applied to the joint block 12 by fitting the striking head 42 to the joint block 12, and the joint block 12 is directly impacted. Can be prevented beforehand.

The rotational force is also the same as that of the joint block 1 described above.
By the same hook-shaped engagement as the two, the transmission is favorably performed to the pile 10 side.

As described above, according to the first embodiment, in addition to the various effects described above, only small projections such as bolt heads are provided on the outer periphery of the joint position, and the same overall pipe diameter is maintained. Since the driving operation can be performed, there is little penetration resistance, and a smooth driving operation can be performed.

In the above embodiment, the ridge is formed on the outer peripheral wall and the concave groove is formed on the outer periphery of the cylindrical portion. In addition, by doing so, the joint blocks 12 stacked vertically can be shared in the same shape.
If not shared, one of the joint blocks may be formed with a ridge and the other joint block may be formed with a groove.

Further, in the embodiment, the case where the joint block is applied to a cylindrical steel pipe is shown. However, in the case of a concrete pile, it can be used by welding to an end plate thereof, and can also be applied to a square steel pipe. . At this time, when applied to a square steel pipe, its cross section may be formed in a square shape. In this case, the shape of the outer peripheral wall portion can be selected from an L-shape or a U-shape. What is necessary is just to select the design which can perform the positioning connection work of the upper pile to the lower pile smoothly. The application to the square steel pipe will be described later.

[Second Embodiment] See FIG. 6 In this embodiment, the joint block 12 is formed by forming a disc-shaped substrate 14 having the same diameter as the pile 10 and an outer peripheral wall 16 as separate bodies. The outer peripheral wall 16 having a semicircular shape is integrated by fillet welding to the outside of the pile 10 and the base 14.

A projecting ridge 20 protrudes circumferentially inside the upper part of the outer peripheral wall 16, and a concave groove 22 is formed on the outer periphery of the base 14. In this embodiment, effects similar to those of the first embodiment can be obtained. In FIG. 5B, the cross-sectional shapes of the ridges 20 and the concave grooves 22 illustrated on the left side are inclined, whereas those illustrated on the right side are right-angled. In the present invention, any one of the other embodiments can be arbitrarily selected.

Third Embodiment Referring to FIGS. 7 to 9 In this embodiment, the joint block 12 has the same shape and structure as described above. The bolt 38 is screwed and fixed via a pair of arc-shaped reinforcing plates 50. For reinforcement,
Alternatively, when it is necessary to stop water, it is preferable to attach or apply a water stop material to the inside of the reinforcing plate 50.

Further, a wire is selected as the binding member 34 during the above-described lateral movement, and after fastening and positioning by the fastening member 36, the binding member 34 is left as it is on the outer peripheral portion, and the outer periphery of the reinforcing plate 50 is formed into a headband shape. Bondage is fixed.

If the reinforcing effect of the reinforcing plate 50 is sufficient, the binding member 34 is not always necessary, and it is sufficient to select whether or not it is necessary according to the required strength.

[Fourth Embodiment] See FIGS. 10 to 12 In this embodiment, the shape and structure of the joint block 12 are the same as those described above, but a reinforcing plate 60 made of a metal band is wound around the outer periphery thereof. At the left and right opposing positions, the bolts 38 are screwed and fixed, and a plurality of bolts 38 are also passed through the wrapped end 60 a to be connected to the joint block 12. In addition, when it is necessary for reinforcement or water stoppage,
It is similar to the case of the reinforcing plate 50 that the waterproof material is preferably stuck or applied to the inside of the reinforcing plate 60.

Further, a wire is selected as the binding member 34 at the time of the above-mentioned lateral movement, and after fastening and positioning with the fastening tool 36, the binding member 34 is left as it is on the outer peripheral portion, and the outer periphery of the reinforcing plate 60 is formed into a headband shape. Bondage is fixed.

If the reinforcing effect of the reinforcing plate 60 is sufficient, the binding material 34 is not always necessary, and it is sufficient to select whether or not it is necessary according to the required strength.

Fifth Embodiment Referring to FIGS. 13 and 14, in this embodiment, a joint block main body 70 is fixed to the opening of the pile 10 by welding or the like, and bolts are fastened to the outer periphery of both joint block main bodies 70. It consists of a half-split outer peripheral wall 72 common to both joint body block bodies 70 to be fixed,
A concave groove 74 is formed on the outer periphery of each joint block main body 70, and a pair of convex portions 76 that engage with the two concave grooves 74 are formed on the inside of the outer peripheral wall 72 so as to correspond thereto.

In this embodiment, when the upper pile 10 is suspended, it can be suspended on the same axis without laterally moving as in the first embodiment.
When the two are joined, the outer peripheral wall 72 is overlapped from the outer periphery thereof,
These are connected together by bolt connection.

As shown in FIGS. 13 and 14A, the outer peripheral wall 72 may be convex and the outer periphery of the main body 70 may be concave. However, as shown in FIG. Of course, it is also possible. Also, FIG.
In (b), the unevenness is inclined, but the cross section may be a right angle without such an inclination. Further, FIGS. 7A and 7B show an example in which the projection formed inside the joint block main body 70 is fitted into the inside of the piles 10 and welded, but the projection is not provided on the joint block. Butt welding can also be performed while mounted.

[Sixth Embodiment] ... See FIGS. 15 and 16 In the fifth embodiment, the moment in the rotational direction must be supported by bolts. In this embodiment, the supporting force against the rotational moment is used. Is a special enhancement of
A pair of disk-shaped substrates 80 which are flange-connected to the open ends of the piles and are fixed by welding or the like, and a plurality of base plates 80 arranged radially from the center of each of the base plates 80 and fixed to the substrate 80 by welding or the like A rotation receiving plate 82 is provided, and bolt holes 84 are formed in the upper and lower portions of each rotation receiving plate 82 so as to penetrate therethrough.

A groove 86 is formed on one side of the rotation receiving plate 82 fixed to one substrate 80 in the clockwise direction toward the horizontal direction, and the rotation receiving plate 82 is fixed to the other substrate 80. On one side in the clockwise direction, a convex portion 88 that fits into the concave groove 86 is formed so as to protrude therefrom.

Then, the bolt 90 is inserted into the bolt hole 84.
Are inserted, and the opposite protruding end is fixed with a nut.

Therefore, in this embodiment, the axial direction is uneven fitting, and the rotational moment in the direction around the axis is transmitted through the rotation receiving plate 82, so that a large external force is applied to the fastening portions of the bolt nuts 90 and 92. Therefore, the same effect as in the first embodiment can be obtained.

In the present embodiment, the groove 86 is formed on one of the rotation receiving plates and the projection 88 is formed on the other rotation receiving plate. However, by alternately arranging them, it is possible to share parts. .

Further, in the illustrated example, the case where four connecting plates 82 are arranged at 90 ° intervals for each substrate 80 is shown. However, as long as the bolt fastening workability is not impaired, a larger number may be arranged radially. Of course.

[Seventh Embodiment] ... Refer to FIGS. 17 to 21. This embodiment is an embodiment in which a square steel pipe pile is used instead of the cylindrical pile in the fifth embodiment, and various modifications. It is to explain.

First, FIG. 17 shows the basic shape of the present embodiment, which is fixed to the opening of the square steel pipe pile 100 by welding or the like, and is formed in a semi-circular shape and raised and formed in a U-shape. Rectangular joint block main body 102 having an outer peripheral wall portion (which may be L-shaped) and an inner peripheral wall portion formed inside the inner peripheral wall portion so as to be raised up to a half of the outer wall portion.
And a concave groove 1 formed on an outer peripheral portion of the inner peripheral wall portion that is half exposed.
06, and a ridge 108 protruding in a circular shape on the upper inner periphery of the outer peripheral wall portion.

In the present embodiment, similarly to the fifth embodiment, when the upper pile 100 is hung, the upper pile 100 can be hung on the same axis without laterally moving as in the first embodiment. At the time of joining, the outer peripheral wall portions are overlapped from the outer periphery, and are connected together by bolt connection. Also, in the present embodiment, a configuration in which the concavo-convex shape is reversed can be adopted. Further, in the present embodiment, since it has a U-shape, the transmitting force of the rotational moment is received by the outer peripheral wall.

[First Modification] FIG. 18 Referring to FIG. 18, a square joint block main body 102 fixed to the opening of the square steel pipe pile 100 by welding or the like, and bolts are fastened to the outer periphery of both joint block main bodies 102 It is composed of a U-shaped semi-circular outer wall 104 common to both joint body block bodies 102 to be fixed. A concave groove 106 is formed on the outer periphery of each joint block main body 102, and a pair of convex portions 108 that engage with the two concave grooves 74 are formed on the inside of the outer peripheral wall 104 so as to correspond thereto.

[Second Modification] Referring to FIG. 19 In FIG. 19, the outer peripheral wall 110 is divided into four parts in an L-shape, and a pair of convex portions 112 is formed on each inner surface to protrude.

[Third Modification] See FIG. 20 In FIG. 20, the outer peripheral wall 120 is divided into two L-shapes.
A convex portion 122 is formed on each inner surface to protrude.

[Fourth Modification] Referring to FIG. 21 In FIG. 20, the outer peripheral wall 130 is
2 is formed in a flat plate shape corresponding to each side, and a pair of convex portions 132 is formed so as to protrude from each inner surface.

It is needless to say that the modifications of the first to sixth embodiments can be arbitrarily applied to the seventh embodiment described above.

[Additional Items in First to Seventh Embodiments]
The first to seventh embodiments have been described above. However, the present invention is not limited to the above-described shape examples, and it is needless to say that various modifications can be made within the scope of the present invention. Further, for example, for fastening by bolts, a nut may be welded in advance to the inside of the joint blocks 12 and 102, and a headed bolt may be screwed into the nut, or after the stay bolt is screwed, the nut may be further screwed from the outside. Good. Further, a bolt support box is fixed inside the joint blocks 12 and 102 corresponding to the bolt holes,
A bolt with a head is housed in the box so that the head is positioned inside (preferably, the bolt is prevented from projecting out by a magnet or the like). The nut can also be pulled out and fastened with a jig. In this case, it is more preferable to cover with a packing such as plastic during transportation.

[Eighth Embodiment] See FIG. The eighth embodiment and subsequent embodiments will be described in connection with a case where the present invention is applied to a pile made of a cylindrical steel pipe again, in which the upper and lower piles are connected to each other by a fastening ring.

Referring to FIG. 22, a tightening ring 200 having a slightly larger inner diameter than the upper and lower joint blocks 12 fixed to the upper and lower ends of the pile 10 is loosely fitted. The insertion plate 202 having a required thickness formed in an arc surface similar to the arc of the outer peripheral surface of the joint block 12 is inserted into the gap between the upper and lower sides, and the hammer H and a not-shown sword are inserted from the upper or lower side. The tightening ring 200 is interposed between them by tapping into the gap between them and the like, and the tightening ring 200 is tightened to the outer periphery of both joint blocks 12 by being tightened.

In the figure, reference numeral 204 denotes a fastening ring 2.
00 is arranged on the outer periphery of the joint block 12, the pile 10
Is a stopper for preventing the ink from dropping along the outer circumference.

In this embodiment, the insertion plate 202
The jointing blocks 12 can be firmly connected to each other only by the tapping operation, which is effective in shortening the fastening operation time.

[Ninth Embodiment] ... Refer to FIG. 23 This embodiment is similar to the eighth embodiment, except that the tightening ring 210 is formed to have substantially the same inner diameter as the outer diameter of the joint block 12. A ring main body 212 having a C-shaped cross section with one side opened, an inner diameter equal to the outer diameter of the ring main body 212, applied to the side opening, and both sides filled with an outer peripheral portion of the ring main body 212. The cover ring 214 is integrated by welding, and is inserted into a gap formed on the inner periphery of the cover ring 214 and the outer periphery of the joint block 12 from the upper side or the lower side.
The ring block 210 is inserted into the gap by using a hammer H and a chisel (not shown) from the upper or lower side as shown in FIG.
2 and are fastened with an interference fit. Also, reference numeral 20
Numeral 4 denotes a stopper for preventing falling similar to the above embodiment.

This embodiment is also effective in shortening the fastening work time, as in the eighth embodiment.

[Tenth Embodiment] ... Refer to FIGS. 24 and 25 This embodiment is similar to the eighth embodiment, however, as shown in FIGS. A tapered surface 220a which is narrowed downward is formed on one inner side of the tightening ring 220 to be disposed.
A wedge-shaped insertion plate 222 is inserted into 20a, and is hammered between the clamping ring 220 and the joint block 12 by a hammer H and a chimney (not shown). As a result, as shown in FIGS. It becomes a combined state.

Therefore, in this embodiment, the initial positioning of the insertion plate 222 is simplified, and the workability is further improved. Further, in the present embodiment, the insertion plate 222 is beaten from the upper side, and therefore the tapered surface 220a is tapered toward the lower side. However, in some cases, the taper surface 220a may be beaten from the lower side. Needless to say, a tapered surface having a slope opposite to that shown in the drawing may be used.

[Eleventh Embodiment] ... Refer to FIG. 26 In this embodiment, unlike the above embodiments, the joint blocks are provided on the outer peripheral portions of the upper and lower joint blocks 230 and 232.
In a state where the two are overlapped, the tapered surfaces 230a and 232a that continuously expand toward the upper side are formed, and the lower outer peripheral diameter of the lower joint block 232 is minimized.
It is formed slightly larger than the outer diameter of 0.

Correspondingly, the inner diameter of the tightening ring 234 is formed with a tapered surface 234a that expands toward the upper side at the same inclination as the outer circumference of the joint blocks 230 and 232.

Therefore, in this embodiment, the tightening ring 234 is loosely fitted on the outer periphery of the lower pile 10 in advance, and the upper ring block 230 is connected to the lower ring block 2.
32, with the tightening ring 234 raised,
When the user taps in the direction of the arrow in the figure, the two bite into a tapered shape, and the two joint blocks 230 and 232 are fastened to each other with a tight fit.

In addition to the above-mentioned tapping work, shrink fitting can be performed by heating the fastening ring 234 in advance, and in this case, the fastening force is further increased.
Also, in the present embodiment, the taper can be, of course, reverse to the above, and can be fitted toward the lower side.

[Twelfth Embodiment]... See FIG. 27 In this embodiment, a fastening ring 240 made of a band is formed in a winding shape in accordance with the outer peripheral shape of the joint block 12, and the winding is performed. A fixed box 242 having a U-shaped cross section is arranged on the outer periphery of the end 240a,
In this embodiment, a gap is formed between the inside of the fixed box 242 and the outside of the wrapped end 240a by integrating the upper and lower portions of the inside of the 40a by welding.

The inner diameter of the tightening ring 240 is slightly larger than the outer diameter of the joint block 12 at first, and is loosely fitted to the outer periphery of the joint block 12, and then the insertion plate 244 having a wedge-shaped cross section is inserted into the gap. By doing so, the tightening ring 240 is wound and fastened to the outer periphery of the joint block 12 with an interference fit. Reference numeral 204 denotes a stopper for preventing falling off.

In the drawing, the insertion plate 240
Is inserted clockwise as indicated by the arrow, and
The inner surface of the fixed box 242 is formed with a tapered surface 242a that tapers in the insertion direction. However, the taper surface 242a may be formed in any direction, and it is needless to say that a tapered surface shape corresponding to the insertion direction can be formed.

[Thirteenth Embodiment] ··· FIGS.
This embodiment is similar to the twelfth embodiment, but slightly different in shape and insertion direction of the insertion plate.

In the figure, a tapered plate 252 is fixed by welding to the inner and outer peripheral ends of a winding end 250a of a tightening ring 250 which is initially formed to have a slightly larger diameter than the outer diameter of the joint block 12. A gap having a predetermined length in the circumferential direction is provided in the overlapped portion of the winding end 250a, which is the thickness of the two tapered plates 252.

As shown in detail in FIG. 30, each of the tapered plates 252 has a shape that tapers toward the lower side, and the gap is formed in a space that tapers upward and downward accordingly. I have.

Further, the outer periphery of the winding end 250a has a U-shaped cross section, and the upper side has an opening 2 corresponding to the gap.
The box plate 254 having the 54a is arranged, and its upper and lower ends are integrated by welding on the upper and lower sides of the inner periphery of the winding end 250a.

In the above configuration, when the insertion plate 256 having a wedge-shaped cross section is driven in from the upper side of the gap, the gap is widened in the circumferential direction according to the taper.
As shown in the direction of the arrow 9, the inner and outer circumferences of the tightening ring 250 are relatively moved in the opposite directions to wind and tighten the tightening ring 250. The state is concluded. At this time, since it is regulated by the box plate 254 in the radial direction, it is exclusively tightened in the circumferential direction. Reference numeral 204 denotes a stopper for preventing falling off.

In the drawing, the insertion plate 256
Is driven from the upper side, but may be driven from the lower side. In this case, the inclination direction of the tapered plate 252 may be reversed.

[Fourteenth Embodiment] ... See FIG. 31 In the present embodiment, the eighth to thirteenth embodiments have a tightening structure by driving an insertion plate. Work style is adopted.

In the drawing, box plates 262 are fixed by welding to the upper and lower portions of the inside of the winding end 260a of the tightening ring 260, and surround the outer portion.
A stopper block 264 protrudes from the fixed portion of the box plate 262 on the outer periphery of the winding end 250 a at a position on the delay side in the circumferential direction from the fixing portion of the box plate 262. A clamp vise 266 is provided between the stopper block 264 and the box plate 262. And tightening the tightening ring 260 by reducing the diameter between the two.

The clamp vise 266 used for the above operation
Are fixed jaws 2 meshing with the stopper block 264.
A box-shaped main body 266b having one end with 66a;
A screw movable movable jaw 266c arranged on the other end side of the main body 266b, and a main body 2 of the movable jaw 266c.
A driver handle 266d connected to a protruding end from the connector 66b via a remote wire or the like is provided. The clamp vise 266 is set from the loosely fitted state of the tightening ring 260 to the joint block 12, and the driver handle 266d is operated. As a result of moving the movable jaw 266c, the box plate 262 moves toward the stopper block 264, and as a result, both sides of the tightening ring 260 are moved relative to each other along the circumferential direction as shown by the arrows, and are tightened.

Note that the clamp vise 266 may be removed from the fixed position after the winding operation, or may be kept in an integrated state (what is this?).
・ If it is permanent plastic deformation, it can be removed, and it is necessary to keep it tight in case of spring back etc.)

[Fifteenth Embodiment] ... See FIGS. 32 and 33 In the present embodiment, the eighth to thirteenth embodiments have a fastening mode involving plastic deformation of the fastening ring. In an embodiment, the tightening ring performs the tightening action while remaining rigid.

In this embodiment, an oval fastening ring 2 whose both sides are equal to the outer diameter of the pile 10 or the joint block 12 is used.
70, a pair of ring receivers 272 approaching and integrated with one side of the upper and lower joint blocks 12, a turnbuckle receiver 274 integrated with the other side of the upper joint block 12, A turnbuckle 276 for tensioning the ring 270 is provided.

The mounting operation of the tightening ring 270 in the above configuration is as follows.

First, as shown in FIG. 32 (a), when the joint blocks 12 are connected to each other, they are loosely fitted on the outer periphery of the upper side pile 10 and are inclined so that the tightening ring 270 is frictionally moved at the inclined position by friction. 10 supported on the outer circumference.

When the joining of the joint blocks 12 is completed from this state, the fastening ring 270 can be moved along the outer circumference by making the tightening ring 270 horizontal, and one end of the ring is received as shown in FIG. 272 is supported.

Subsequently, as shown in FIG. 33A, the other end of the tightening ring 270 is lifted and positioned above the receiving base 274. Then, as shown in FIG.
Turnbuckle 27 between clamp 76 and tightening ring 270
When the turnbuckle 276 is turned in the spreading direction with the interposition of the ring 6, the tightening ring 270 rotates upward with the ring receiver 272 as a fulcrum, and is tightened by a horizontal component F ′ generated by the tightening pressure F of the turnbuckle 276. Yields
As a result, a force for relatively tightening the joint blocks 12 is generated.

It is desirable that only the holding portions on both sides are formed in an inclined shape so that both sides of the tightening ring 270 are parallel to the side surfaces of the joint block 12 in a tensioned state as shown in the figure.

[Additional Explanation in Eighth to Fourteenth Embodiments] The eighth to fourteenth embodiments described above can also be applied to the fastening of a joint block of a pile made of a square steel pipe described in the seventh embodiment. Of course. However, in this case, since the tightening force is applied to the corners, the coupling effect of the tightening is reduced. Therefore, it is particularly recommended to use a structure for connecting the joint blocks of a pile made of a cylindrical steel pipe or a cylindrical concrete pile.

In the eighth to fourteenth embodiments, the joint blocks may be connected only by the tightening force of the tightening ring, or bolts may be used together. In the former case, the effect of shortening the fastening operation time can be expected, and in the latter case, a more reliable connection form can be obtained.

[Cross Sections of Concave and Convex Grooves in Joint Block]... See FIG. 34 In the above embodiments, only simple explanations of the cross sections of the convex and concave grooves were given. Various cross-sectional shapes shown collectively can be set.

For example, FIG. 11A shows the uneven shape (including inclined or non-inclined) described above, FIG. 9B shows the uneven shape including goby, and FIG. 9C shows a fine triangle. , (D) is an uneven shape of a continuous fine rectangular shape, (e) is an uneven shape of a large waveform cross-section, (f) is an uneven shape of a continuous fine waveform, (G) is an uneven shape of a cross section in which a plurality of large triangles are continuous, (h) is an uneven shape of a cross section where a pair of trapezoids mesh with each other,
(I) is a concavo-convex shape in which a continuous triangular peak and valley are rounded into a curved surface.

In addition to the illustrations, various cross-sectional shapes can be used as much as possible. However, an optimum cross-sectional shape can be selected for the above uneven shape in consideration of the manufacturing cost, the reliability of coupling between the joint blocks 12, the mechanical structure, and workability.

The tightening rings 210, 220, 23
4, 240, 250, 260, and 270, a bolt hole (one or more locations in the circumferential direction: one or more locations in the axial direction) is formed, and a bolt or the like is tightened so that the end face of the bolt hits the outer surface of the pile. Further tightening creates a reaction force on the insert plate, which causes the insert plate to tighten the pile. In this case, it is preferable that the insertion plate is formed of a spring material. Also, it is preferable to fill the gap between the fastening ring and the insertion plate with an adhesive. Furthermore, a plurality of insertion plates can be inserted into one clamping ring.

[0110]

According to the present invention, the following effects can be obtained.

In the axial direction of the pile, a strong connection is maintained by the concave-convex fitting, and a rotational moment is transmitted in the rotational direction by hook-shaped engagement between the outer peripheral walls, so that the grip position can be moved up and down. In addition to the high joining rigidity, there is an advantage that sufficient durability against an impact in the axial force direction and the eccentric bending direction can be provided, and a high torque transmitting force in the rotational direction can be obtained. Therefore,
It is possible to support both the drilling method and the hitting method.

[0112] The number of bolts is 1 /
3 or less, workability is remarkably improved, and work time can be shortened (work is completed in about 4 to 5 minutes with a φ600 type).

By using a joint block having the same diameter as the outer diameter of the pile, the penetration resistance can be reduced.

By connecting the outer peripheral surfaces of the two joint blocks by the tightening ring in a tight fit, the bolt fastening operation can be omitted or the number of bolts can be reduced, and the work efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a joint according to a first embodiment of the present invention.

FIGS. 2A to 2D are explanatory views showing a procedure for positioning and connecting a pile provided with the joint portion.

FIG. 3 is a sectional view of the assembled state.

FIG. 4 is a sectional view showing the modification.

FIGS. 5 (a) and 5 (b) are an exploded view and an assembled view showing a mounting structure of a hitting head to the joint block.

FIGS. 6A and 6B are a perspective view and a sectional view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a third embodiment of the present invention.

FIG. 8 is a side view showing the assembled state.

FIG. 9 is a plan sectional view showing the completed assembly state.

FIG. 10 is a perspective view showing a fourth embodiment of the present invention.

FIG. 11 is a side view showing the assembled state.

FIG. 12 is a plan sectional view showing the completed assembly state.

FIG. 13 is a perspective view showing a fifth embodiment of the present invention.

FIGS. 14 (a) and (b) are partial side sectional views showing the main part and a modified example thereof.

FIG. 15 is a perspective view showing a sixth embodiment of the present invention.

FIG. 16 is a sectional side view of a main part showing the assembled state.

FIG. 17 is a perspective view showing a seventh embodiment in which the present invention is applied to a square steel pipe pile.

FIG. 18 is a perspective view showing the first modification.

FIG. 19 is a perspective view showing the second modification.

FIG. 20 is a perspective view showing the third modification.

FIG. 21 is a perspective view showing the fourth modification.

FIG. 22 is a horizontal sectional view and a vertical sectional view showing an eighth embodiment of the present invention.

23A and 23B are a cross-sectional view and a vertical cross-sectional view illustrating a ninth embodiment of the present invention.

FIGS. 24A and 24B are cross-sectional views of a tenth embodiment before and after fastening.

FIGS. 25A and 25B are longitudinal sectional views before and after fastening in the tenth embodiment.

26A and 26B are a cross-sectional view and a vertical cross-sectional view illustrating an eleventh embodiment of the present invention.

FIG. 27 is a horizontal sectional view and a vertical sectional view showing a twelfth embodiment of the present invention.

FIG. 28 is a horizontal sectional view and a vertical sectional view showing a thirteenth embodiment of the present invention.

FIG. 29 is a cross-sectional view before and after fastening at an A-portion enlarged position in FIG. 28.

FIG. 30 is an enlarged side sectional view before and after fastening at an enlarged position A in FIG. 28.

FIG. 31 is an enlarged perspective view showing an external shape before and after the fastening.

FIGS. 32 (a) and 32 (b) are longitudinal cross-sectional explanatory views showing a fastening work mode showing a fourteenth embodiment of the present invention, the plan view including a partly flat cross section.

FIGS. 33 (a) and (b) are longitudinal sectional explanatory views showing a fastening operation mode continued from FIG. 32.

FIGS. 34 (a) to (i) are longitudinal sectional views showing examples of the sectional shapes of the ridges and grooves in each embodiment.

FIG. 35 is an explanatory diagram of a construction method showing a general pile driving procedure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Cylindrical steel pipe pile 12, 230, 232 Joint block 14 Substrate 16 Outer peripheral wall part 18 Tube part 20 Convex ridge 22 Depressed groove 24, 26 Bolt insertion hole 28, 30 Lateral guide hole 32 Guide pin 38 Bolt 210, 220, 234 , 240, 250, 260, 2
70 Tightening ring 216,222,244,256 Insertion plate

Claims (11)

[Claims] 1. A joint block comprising a pair of joint blocks fixed to a joint surface of a pile end, wherein each of the joint blocks is formed so as to form a semi-peripheral shape from a peripheral edge of the substrate and a substrate seated on the pile end surface. An outer peripheral wall portion, a cylindrical portion inside the outer peripheral wall portion and formed to rise from the substrate with a half of the rising dimension, an upper inner periphery of the outer peripheral wall portion, and a half circumference of the cylindrical portion exposed. It is composed of a ridge formed in one of the outer peripheral parts and formed in a circular shape, and a concave groove formed in the other part in a circular shape. A joint structure for piles, wherein the wall portions are hooked with each other and engage in the rotation preventing direction, and the ridges and the concave grooves are engaged with each other and connected in the axial direction. 2. The pile joint structure according to claim 1, wherein a plurality of bolt holes are formed to penetrate the outer peripheral wall portion and a counterpart cylindrical portion facing the outer peripheral wall portion. 3. A guide hole is formed at a position where the outer peripheral wall portion and a mating cylindrical portion facing the outer peripheral wall portion are fitted to each other in a lateral direction, and is inserted through the guide hole from the outer peripheral wall portion to rotate the outer peripheral wall portion. A joint structure for a pile, wherein a positioning pin for a fitting guide is provided for moving the two guide holes so as to match each other. 4. The pile joint structure according to claim 1, wherein a top surface of said cylindrical portion is set to an inclined surface which becomes lower toward a lateral insertion side. 5. The pile joint structure according to claim 2, wherein a reinforcing plate is interposed at the outer periphery of the bolt connection position. 6. The joint structure for a pile according to claim 1, wherein the joint block has a cylindrical cross section. 7. The joint structure for a pile according to claim 1, wherein the joint block has a prismatic cross section. 8. A joint ring according to claim 1, further comprising a tightening ring which is inserted into the outer peripheral portions of the joint blocks in a state where the joint blocks are overlapped with each other and fastens the joint blocks together. The joint structure of the pile described. 9. The tightening ring is loosely fitted to the outer periphery of both joint blocks, reduced in diameter by an appropriate fastening means, and fastened to the outer periphery of both joint blocks by crimping. The joint structure for a pile according to claim 9, wherein 10. The joint structure for a pile according to claim 9, wherein the fastening means is an insertion plate which is inserted between an outer periphery of both joint blocks and a fastening ring to fasten the two. 11. A tightening ring is wound around the outer periphery of both joint blocks, wherein the tightening means moves the wound end of the tightening ring in a circumferential direction to contract. The joint structure for a pile according to claim 9.