JPH11264136A - Enlarged excavated hole pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an enlarged excavated hole pile capable of facilitating the insertion of aggregate into a boring hole and uniformly arranging the aggregate to an enlarged diameter part in the boring hole. SOLUTION: A plurality of wing members 10a are mounted at an equal interval along the circumference of a mounting plate 12 so as to fit to the end face of a pile 2. Or, the wing members 10a are so formed that the first member 10a' is connected to one end of the second member 10" to form a bending section 11, one end of the member to be connected is mounted around the mounting plate 12, the other end is mounted to a contact plate 14 having a diameter smaller than the mounting plate 12 in a rotatable manner, and the bending section is extended and is inserted into the boring hole. The bending section is bent at a stage when it reaches a diameter enlarged bearing layer, the insertion of aggregate into the boring hole is facilitated, and the aggregate can be arranged equally to an enlarged diameter part of the boring hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile for an excavation hole used for a boring hole having an enlarged tip.

[0002]

2. Description of the Related Art As a method of giving a pile a large supporting force, there is a method of forming an enlarged bulb portion at the tip.

In this method, for example, as shown in FIGS. 18 and 19, a bulb portion 5 is formed using a bit 1 having a wing expanding function, and the wing expanding of the bit 1 is folded (FIG. 1).
8 (a)), excavating the pile 2 until it reaches the support layer 3 while adding the pile 2 (FIGS. 18 (b) to 18 (c)). When the support layer 3 is reached, excavation is performed by expanding the wings of the bit 1 (FIG. 19).
(A)). After drilling, inject cement milk and bit 1
Is closed and lifted (FIG. 19 (b)) to form a bulb 5 at the tip of the pile 2 (FIG. 19 (c)).

However, in the above method, since the bulb portion 5 has a structure made of only concrete, there is a problem that it is not sticky to external force and is brittle.

[0005] To solve this problem, if there is an aggregate in the bulb portion 5, the aggregate can be integrated with concrete to solve the above-mentioned problem.

[0006]

However, when the aggregate is provided at the bulb portion as described above, it is necessary to insert a large aggregate to be disposed at the enlarged bulb portion through a bore hole smaller than the bulb portion. There is a problem that it does not.

At this time, the aggregate provided at the bulb portion is
If they are not evenly arranged, there is a problem that a fragile portion is formed and stable strength cannot be obtained.

[0008] Therefore, an object of the present invention is to make it possible to easily insert aggregates and to arrange them evenly on a bulb portion.

[0009]

In order to solve the above-mentioned problems, according to the present invention, one end of a wing material having a bent portion formed between the other end and the other end is attached along the circumference of the tip. When the wing material attached along the circumference is inserted into a boring hole in which the diameter of the support layer is enlarged, the wing material is bent so that the bent portion protrudes from the outer periphery of the pile.

By adopting such a configuration, the wing material, one end of which is attached along the periphery of the tip, is inserted into the boring hole with the bent portion extended so as not to protrude from the outer periphery of the pile, and expanded. After reaching the diameter of the support layer, the bent portion is bent and expanded.

At this time, by attaching a plurality of wing members along the periphery of the tip, if the wing members are arranged at equal intervals, they can be evenly arranged on the bulb portion.

According to a second aspect of the present invention, when a plurality of wing members having one ends rotatably mounted along the periphery of the tip are inserted into a boring hole having an enlarged diameter of the support layer, the wing members are rotated from the outer periphery of the pile. Therefore, a configuration was adopted in which the projections also protruded.

By adopting such a configuration, the wing material having one end rotatably mounted along the periphery of the tip is inserted into the boring hole in a closed state so as not to protrude from the outer periphery of the pile. , At the stage where the diameter of the support layer is increased,
The wing material is spread by rotating the pile.

At this time, a plurality of wing members are attached along the circumference of the tip, and if the wing members are attached at equal intervals, the wing members can be evenly arranged on the bulb portion.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment.

In this embodiment, a pile (for example, a concrete pile) 2 having four wing members 10a attached along the periphery of the tip will be described.

As shown in FIG. 1, each wing member 10a is composed of a plate-like first member 10a 'and a second member 10a ".

The first member 10a 'has one end connected to the second member 10a'.
The first member 10a 'is attached to an attachment plate 12 at one end of the pile 2 so as to be rotatably attached to one end of the pile 2 by a pin and a pin. It is attached to the end face.

That is, as shown in FIG. 2, the mounting plate 12 is an end plate formed in a donut shape,
Is fitted to the end face of the horn. In addition, four mounting portions 13 are provided on the surface at equal intervals along the circumference, and each of the mounting portions 13 is provided with the first member 10.
The other end of a 'is rotatably mounted with a pin.

On the other hand, a ground plate 14 is attached to the other end of the second member 10a ".

The grounding plate 14 comprises a flat grounding portion 14a and an engaging portion 14b erected on the grounding portion 14a. The grounding portion 14a has a smaller diameter than the mounting plate 12. Further, a mounting hole is provided in the engaging portion 14b, and the other end of the second member 10b is rotatably mounted with a pin. In this embodiment, the engaging portions 14b are arranged in a cross shape, and four wing members 10 are attached.

This embodiment is configured as described above. This pile for an enlarged excavation hole is formed by expanding the diameter of the support layer 3 by boring, and cutting the bit 1 from the enlarged boring hole 6.
Take out and insert. At this time, the tip of the wing material 10 is thinner than the outer diameter of the pile 2 by making the ground plate 14 smaller in diameter than the mounting plate 12. Therefore, insertion into the boring hole 6 can be easily performed as shown in FIG.

When the ground plate 14 lands on the bottom of the bored hole 6 whose diameter has been increased, the pile 2 thus inserted is further pressed. Then, as shown in FIG. 3, the wing material 10 is bent so that the bent portion 11 is bent and protrudes from the pile 2. At this time, the protrusions are evenly projected by arranging the wing members 10 at equal intervals along the periphery of the pile 2.

In this state, when the cement milk 4 is injected, the bulb portions 5 having increased strength can be formed by the wing members 10 arranged evenly.

FIG. 4 shows a second embodiment.

In this embodiment, a bending wire 15 is attached to the first embodiment.

That is, as shown in FIG. 4, one end of the wire 15 is connected to the engaging portion 14b of the ground plate 14, and the other end is out of the boring hole 6 through the through hole of the pile 2. .

The other configuration is the same as that of the first embodiment, and the description is omitted.

This embodiment is configured as described above. The pile for the enlarged excavation hole is similar to the first embodiment.
A boring hole 6 in which the diameter of the support layer 3 is increased by boring.
And then insert bit 1 after extracting it.

When the ground plate 14 lands on the bottom of the bored hole 6, the inserted pile 2 pulls the wire 15 from outside the hole by a winch or the like, as shown in FIG. Then, the pulled wing material 10a can be easily bent by the pulling force, the weight of the pile 2, and the like.

By providing the wire 15 in this manner, the wire 15 can be easily bent without pressing.

The other operation is the same as that of the first embodiment, and the description is omitted.

In the first and second embodiments, the first member 10a 'and the second member 10a "are connected to the wing material 10a by pins and bent, but the invention is limited to this method. For example, the bent portion may be made to be bendable by forming the bent portion with a soft material or weakly.

FIG. 6 shows a third embodiment.

In this embodiment, as shown in FIG.
A description will be given of a pile 2 in which a plurality of wing members 10b are rotatably attached to the tip.

Here, four wing members 10b are arranged at equal intervals along the circumference of the tip of the pile 2.

Each wing material 10b is L-shaped as shown in FIG. 6 (b), and is provided on the donut-shaped end plate 12 by providing a through hole in a horizontal portion twisted 90 degrees as shown in FIG. It is designed to be attached to the engaging portion 16 with a pin. Therefore, the wing material 10b thus attached can be rotated along the side of the pile 2 as shown in FIG. Also, as shown in FIG.
It can be opened about a degree and deployed diagonally downward.

Furthermore, the tip of the vertical portion of the wing material 10 is warped outward so that the wing material 10b comes into contact with the hole wall when the wing material 10 is inserted into the boring hole 6 so that the wing material 10b comes into close contact with the side of the pile 2. .

This embodiment is configured as described above. The pile for the enlarged excavation hole is inserted into the hollow of the pile 2 with the bit 1 having the expanded wing folded, and the pile 2 is added to the support layer 3 while adding the pile 2. It can be excavated until it reaches.

At this time, the wing material 10b is rotated and inserted along the side surface of the pile 2 as shown in FIG. At this time, the tip of the warp of the wing material 10b abuts against the hole wall, and the wing material 10 can be brought into close contact with the side portion of the pile 2, so that the insertion can be performed smoothly.

Upon reaching the support layer, excavation is performed by expanding the wings of the bit 1. When the diameter is enlarged, the pile 2 is advanced.
At this time, the wing material 10b that has entered the enlarged diameter hole is opened and slightly opened. Therefore, as shown in FIG. 9B, when the cement milk 4 is injected into the hole 17 and the pile 2 is raised,
The wing material 10b can be rotated and opened. Therefore, when the pile 2 is lowered to a predetermined position and the bit 1 is raised, as shown in FIG. 9C, the wing members 10b can be arranged evenly, and the bulb portion 5 having increased strength is formed. be able to.

FIG. 10 shows a fourth embodiment.

In this embodiment, the wing material 10c of the third embodiment
The following is a description of the case where the auxiliary wing material c is provided.

The auxiliary wing material c is, for example, as shown in FIGS.
As shown in FIG. 7, a long hole is provided in the wing material 10c, and one end of a bar material cut short in the long hole is rotatably attached with a hinge or a pin 19. In this embodiment, one wing material 10c
Are provided with two auxiliary wing members c.

Further, the tip of the other end of the auxiliary wing material c is bent in the same manner as the wing material 10c so as to be brought into contact with the hole wall to be in close contact with the wing material 10c.

The horizontal portion of the wing material 10c has 9 mounting portions.
FIGS. 13 (a) and 13 (b) show other configurations, such as being twisted by 0 degrees so as to be along the side of the pile 2 when closed, and can be opened by about 120 degrees when opened. Since it is the same as the third embodiment as shown in b), the description is omitted.

This embodiment is configured as described above, and the pile for the enlarged excavation hole is also inserted into the hollow of the pile 2 by inserting the bit 1 having the expanded wing folded into the hollow of the pile 2 and the pile 2 is added as in the third embodiment. However, excavation can be performed until the support layer 3 is reached.

At this time, the wing material 10c and the auxiliary wing material c
As shown in FIG. 14A, the pile 2 is rotated and inserted along the side surface of the pile 2. Then, the wing material 10c and the auxiliary wing material c
This means that the tip of the warp abuts against the hole wall and the wing material 10c and the auxiliary wing material c can be brought into close contact with the side of the pile 2, so that the insertion can be performed smoothly.

When the diameter has been increased, the pile 2 is advanced. At this time, the wing material 10c and the auxiliary wing material c are opened and slightly opened. Therefore, as shown in FIG. 14B, when the cement milk 4 is injected into the hole and the pile 2 is raised, the wing material 10c can be opened. Therefore, when the pile 2 is lowered to a predetermined position and the bit 1 is raised, the wing material 10d and the auxiliary wing material 10c can be evenly arranged as shown in FIG. As a result, the bulb portion 5 having increased strength can be formed.

When the auxiliary wing material c is provided in this manner, the number of aggregates can be increased, so that the strength of the bulb portion 5 can be further increased.

FIG. 15 shows a fifth embodiment.

In this embodiment, another embodiment in which a plurality of wing members 10d are rotatably attached to the tip of the pile 2 will be described.

Here, the cylindrical member 20 is used for attaching the wing material 10d. The cylindrical member 20 is made of steel, and has flanges 22a and 22b having the same diameter as the end surface of the pile 2 at both ends, and has a hollow 21 having the same diameter as the pile 2 as shown in FIG.

The one flange 22a is attached to the end plate 12 of the pile 2 by welding or the like. Further, on the other flange 12a, engagement pieces 23 provided with through holes are provided at equal intervals along the circumference, and as shown in FIG. One end of the wing material 10d formed in a character shape is rotatably attached with a pin or the like.

This embodiment is configured as described above. The pile for the enlarged drilling hole to which the cylindrical member 20 is attached is inserted into the hollow 21 of the pile 2 by inserting the bit 1 with the expanded wings folded, and It is possible to excavate until the support layer 3 is reached, while adding.

At this time, the wing material 10d has one end rotatably attached to the tip end side of the cylindrical member 20, so that the other end is in contact with the hole wall and closed when the other end is inserted, that is, in a vertical state. It can be held upright. For this reason,
Insertion into the boring hole 6 can be performed smoothly.

When the diameter has been increased, the pile 2 is advanced. Next, after the cement milk 4 is injected into the hole, the pile is rotated in the direction of the arrow as shown in FIG. The wing material 10e opens. Therefore, when the bit 1 is pulled up, as shown in FIG.
Can be evenly arranged. Therefore, the bulb portion 5 having increased strength can be formed.

In the above embodiment, the wing material 10d is "ku"
The shape of the wing material 10d is described above, but the shape of the wing material 10d is not limited to this.

Further, in each of the above embodiments, the pile 2 is made of concrete, but the pile 2 is not limited to this. For example, steel may be used. Is obvious.

[0061]

According to the present invention, the wing material is arranged along the periphery of the pile so that the wing material can be easily inserted into the boring hole, and the wing material can be evenly inserted after the wing material is inserted. Since it is unfolded and protruded from the outer periphery of the pile, the strength of the bulb portion can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is an operation explanatory view of the first embodiment.

FIG. 3 is a diagram illustrating the operation of the first embodiment.

FIG. 4 is a diagram illustrating the operation of the second embodiment.

FIG. 5 is a diagram illustrating the operation of the second embodiment.

6A is a perspective view of a third embodiment, and FIG. 6B is a cross-sectional view of a main part of the third embodiment.

FIG. 7 is an enlarged view of a main part of the third embodiment.

FIG. 8 is an operation explanatory view of the third embodiment.

9A is a diagram illustrating the operation of the third embodiment. FIG. 9B is a diagram illustrating the operation of the third embodiment. FIG. 9C is a diagram illustrating the operation of the third embodiment.

FIG. 10 is a perspective view of a fourth embodiment.

FIG. 11 is an enlarged view of a main part of the fourth embodiment.

FIG. 12 is an enlarged view of a main part of the fourth embodiment.

FIG. 13A is a diagram illustrating an operation of the fourth embodiment. FIG. 13B is a diagram illustrating an operation of the fourth embodiment.

14A is a diagram illustrating the operation of the fourth embodiment, FIG. 14B is a diagram illustrating the operation of the fourth embodiment, and FIG. 14C is a diagram illustrating the operation of the fourth embodiment.

FIG. 15 is a perspective view of a fifth embodiment.

FIG. 16 is a cross-sectional view of a main part of a fifth embodiment.

FIG. 17A is an explanatory diagram of an operation of the fifth embodiment. FIG. 17B is an explanatory diagram of an operation of the fifth embodiment.

FIGS. 18 (a), (b), and (c) are explanatory diagrams of the operation of the conventional example.

FIGS. 19 (a), (b), and (c) are explanatory diagrams of the operation of the conventional example.

[Explanation of symbols]

 Reference Signs List 2 pile 3 support layer 4 cement milk 5 bulb part 6 boring hole 10a wing material 10b wing material 10c wing material 10d wing material 11 bending part 15 wire 18 auxiliary wing material 20 cylindrical member

Claims (2)

[Claims] 1. A boring hole in which one end of a wing material having a bent portion formed with the other end is attached along the periphery of the tip, and the supporting layer is expanded with the wing material attached along the periphery of the tip. A pile for an enlarged excavation hole in which when inserted into a pile, the bent portion projects from the outer periphery of the pile. 2. A plurality of wings, one ends of which are rotatably mounted along the periphery of the tip, are rotated and project from the outer periphery of the pile when inserted into a boring hole having an enlarged diameter of the support layer. Pile for enlarged borehole.