JPH0733669B2 - Yatco for underwater pile driving - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a yatco for driving a pile (including a sheet pile) into a water bottom such as a river bottom, a sea bottom, and a lake bottom.

In civil engineering, a yatco is a pillar-shaped tool that is added to the top of a pile when it is driven below the water surface or below the ground surface.

Yatco generally refers to "scissors," or "arrow octopus."
Sometimes it is used by applying the character. Originally, it was the meaning of a pair of scissors used to make fire on a fire.

For example, when performing vibrating pile driving, the yatco is interposed and fixed between the vibrating device and the pile and transmits vibration to the pile.

[Conventional technology]

A vibration device used in civil engineering construction work generally has a structure in which a plurality of pairs of rotating shafts having eccentric weights are arranged in parallel.

According to such a configuration, the exciting force of the eccentric weight rotating in the opposite direction can be added in the desired direction and can be canceled in the unnecessary direction.

FIG. 3 (A) is a schematic diagram showing a vibrating pile driving work on land.

The vibration device 1 is suspended by a crane (not shown).

The chuck device 2 is fixed to the lower end of the vibrating device 1. Reference numeral 3 is a flange joint that is fastened using bolts and nuts.

The chuck device 2 holds the top of the pile 4 and brings the lower end of the pile 4 into contact with the ground 5.

The vibration device 1 has a built-in drive device (not shown) such as an electric motor and rotates an eccentric weight (not shown) to generate vertical vibration.

The above-mentioned vibration is transmitted to the pile 4 through the flange joint 3 and the chuck device 2, and the pile 4 sinks into the ground 5 due to its own weight and vibration. It is a schematic diagram which shows the operation | work which drives 4.

Reference numeral 1 is a vibrating device described with reference to FIG. (A), 2 is a chuck device, and 3'is a flange joint.

6 is the water surface.

The top portion of the conventional yatco 7 is fixed to the vibrating device 1 by the flange joint 3 ', and the pile 4 is gripped by the chuck device 2 provided at the lower end portion thereof.

Concretely, the pile 4 shown in this schematic view (FIG. 3 (B)) may be a concrete pile, a steel pipe pile, a steel sheet pile, or a steel pipe sheet pile.

FIG. 4 is a schematic view showing a construction method when a large number of steel pipe sheet piles 8 are arranged and driven on the horizontal ground 5 '.

Reference numeral 9 drawn between the adjacent steel pipe sheet piles 8 is a joint of the steel pipe sheet piles. The V-V cross section is enlarged and shown in FIG.
FIG. 5 (A) is a two-port type joint, (B) is a pipe T type joint, and (C) is a pipe type joint.

In the two-port type joint shown in FIG. 7A, a joint 9a having a C-shaped cross section is welded to one steel pipe sheet pile 8 and a T-shaped joint 9b is welded to the other steel pipe sheet pile 8 '.

(B) The pipe T-shaped joint shown in FIG.
An arc-shaped joint 9c having a nearly circular cross section is welded to the other steel pipe sheet pile 8 ', and a joint 9d having a T-shaped cross section is welded to the steel pipe sheet pile 8'.

In the pipe type joint shown in FIG. 6 (C), arc-shaped joints 9e, which are nearly circular, are welded and fixed to both of the one steel pipe sheet pile 8 and the other steel pipe sheet pile 8 '.

Either type of joint can be used, but pipe type joints are becoming popular due to the fact that both joints have no distinction between male and female, and that they have good waterproofness.

In the work shown in FIG. 4 (A), when a large number of sheet piles 8 are sequentially driven, the joints 9 must be engaged and driven.
The top must project above the water surface 6 as shown in FIG.

If the top is sunk below the surface of the water, the joint 9 cannot be engaged even if the next sheet pile is driven.

However, depending on the specifications of the underwater structure or the working conditions, the top of the steel pipe sheet pile 8'may need to be lower than the water surface 6 by the depth D as shown in FIG. 4 (B).

In such a case, in the prior art, the steel pipe sheet piles 8 had to be placed side by side as shown in FIG. 4 (A) and then cut in water along the line cc 'shown in the figure. .

The work involving the above-mentioned underwater cutting consumes a great deal of time and labor, and results in cutting off the upper portion of the steel pipe pile, which is not preferable in terms of resource economy.

Therefore, it is required to perform the underwater driving of the sheet pile by using the yatco that has been used for the single pile driving in the related art.

FIG. 6 is an explanatory view showing a method of arranging steel pipe sheet piles using a Yatco and driving them below the water surface.

This construction method relates to an unknown invention created by the present inventors.

FIG. 6A shows a state in which a large number of steel pipe sheet piles 8, 8 ′, 8 ″, 8 a, ... Are being driven in sequence on the water bottom 5 below the water surface 6.

The steel pipe piles 8,8 ', 8 "have been placed.

Steel pipe piles 8a, 8b, 8c have been placed for the time being,
Yatco 7a, 7b, 7c is still attached.

The steel pipe pile 8d to be driven from now on is erected by suspending the top portion thereof from the crane hook 9 via the Yatco 7d.

The connection between the Yatco 7d and the main pile is achieved by temporarily fixing the main pile with a pile keeper or the like and connecting the joint pipes.

(B) As shown in the figure, the vibration device 1 is attached to the head of the Yatco 7d.
Is attached (held by the chuck device 2 described in FIG. 3), and vibration driving is performed as shown in FIG.

In this case, management of piles (meaning including sheet piles) (tilting, tilting, etc.)
Check the falling and tilting of the yatco to improve the pile driving accuracy.

FIG. 6D shows a state in which the steel pipe sheet pile 8d is driven to a predetermined depth.

The steel pipe sheet pile 8d that has been driven to a predetermined depth is left attached with the yatco 7d. In this state, the steel pipe pile 8d is below the surface of the water, and it is not easy to confirm its position.
The yatco 7d is attached to the steel pipe pile 8d with the role of the sign.

(E) As shown in the figure, a steel pipe pile that has been laid for the time being
It is detached from 8a and the yatco 7a is lifted up. The yatco 7a suspends the next steel pipe sheet pile 8e as shown in Fig. (F), and the yatco 7d is built as a guide.

Comparing the state of this figure (F) to the above-mentioned figure (A), it is the same except that the names indicating the order of the steel pipe sheet pile and the yatco have changed. In this way, the process of one cycle is advanced, and one steel pipe sheet pile is driven in every cycle.

However, if an unknown invention method described with reference to FIGS. 6 (A) to 6 (F) is to be carried out, the construction is difficult with the conventional example of Yatco (FIG. 3) for the following reason.

That is, in each step of the construction method described in FIG. 6, the working yatco is directly suspended by the crane hook 9 in FIGS. (A), (E), and (F).
In FIGS. (B), (C), and (D), the vibration device 1 is attached.

Therefore, in the case of a yatco having a structure in which it is fastened to the vibrating device 1 with the bolts and nuts through the flange joint 3 ′ like the conventional yatco 7 shown in FIG. It wastes a lot of time and labor, and is uneconomical.

In view of the above-mentioned circumstances, in order to construct a YATCO suitable for carrying out the unknown invention method shown in FIG. 6, one end in the longitudinal direction (lower end in use) for piles (including sheet pile) is used. And the other end (upper end when in use) can be gripped by the chuck of the vibration device, and the side face of the pile plate corresponding to the sheet pile joint provided on the pile. It is effective to provide a joint for use.

The YATCO according to the above configuration is an invention created by the present inventors and is being separately applied for by the present applicant (filed on June 6, 1990) (hereinafter referred to as prior invention).

According to the configuration of the invention of the above-mentioned prior application, the vibrating device can be freely attached and detached (via the chuck) to the upper end of the yatco.

Therefore, the vibrating device can be detached from the yatco, the yatco can be left for a while, and another yatco can be gripped by the vibrating device.

Further, if the yatco is used to grip the sheet pile and the vibrating device is attached to the yatco, it is possible to lift the yatco through the vibrating device and also to lift the pile gripped by the chuck of the yatco together. .

In this way, it is possible to carry out the unknown invention method described with reference to FIGS. 6 (A) to 6 (F).

FIG. 7 shows an embodiment of the yatco according to the invention of the aforementioned prior application. FIG. 7A is a side view and FIG. 7B is a front view.

The yatco 11 of this example is provided with a chuck 11b for the steel pipe sheet pile 8 at the lower end of the main body pile 11a.

The upper end portion 11c of the yatco 11 is a grip portion that can be gripped by the chuck device 2 mounted on the vibrating device 1.

When this structure is compared with the conventional example (Fig. 3) to make sure, the yatco 7 of the conventional example has the pile chuck device 2 at the lower end thereof.
Is attached, but the upper end thereof has a structure that cannot be gripped by the chuck device 2 of the vibration device 1.

On the other hand, the yatco 11 of the present example can grip and release the steel pipe sheet pile 8 by the chuck 11b at the lower end thereof, and the upper end thereof can be gripped by the chuck device 2 of the vibration device 1. It has a structure that can be released.

Further, the yatco 11 is provided with a sheet pile joint 11d on its side surface in the longitudinal direction.

The type of the sheet pile joint 11d is, for example, as shown in FIG.
Any of the various sheet pile joints shown in (C) may be used, but as shown in FIGS. 7 (A) and 7 (B), the steel pipe sheet pile 8 provided on the steel pipe sheet pile 8 held by the chuck 11b is shown. The same type as the joint 9, and the steel pipe sheet pile joint 9
It is configured to be aligned on the same straight line as.

In FIG. 7 (A) which is a side view, the width dimension W ₁ of the chuck 11b and the width dimension W 2 of the chuck device ₂ are larger than the diameter dimension d ₁ of the steel pipe sheet pile 8 and are projected outward. In FIG. 7 (B) which is a front view, the steel pipe sheet pile 8 is
The thickness dimension T ₁ of the chuck 11b and the thickness dimension T 2 of the chuck device ₂ are smaller than the diameter dimension d ₁ thereof, and they do not project laterally.

As described above, in the front view (FIG. 7 (B)), the steel pipe sheet pile joint 9 of the steel pipe sheet pile 8 and the sheet pile joint 11d of the Yatco 11 are shown.
And are arranged in a straight line.

Therefore, the width dimension T ₁ of the chuck 11b of this Yatco 11 is
It is smaller than the diameter dimension d ₂ of the main body rod 11a of the yatco 11 and does not project laterally.

In this way, the chuck 11b of the yatco 11 does not project laterally in comparison with the main rod 11a in the front view, when the plurality of steel pipe sheet piles 8 are gripped by the yatco 11 and lined up, Any Yatco 11 chuck 11b
However, it is set so that it does not interfere with the adjacent yatco and does not interfere with the steel pipe sheet pile gripped by the adjacent yatco.

As easily understood by comparing and comparing FIGS. 7A and 7B, the chuck 11b of the Yatco 11 holds the steel pipe sheet pile 8 in the diametrical direction. Specifically, the steel pipe sheet pile joint 9 is sandwiched in a direction orthogonal to the direction in which the steel pipe sheet pile joint 9 is arranged (the direction perpendicular to the paper surface in FIG. 7 (A), the horizontal direction in FIG. 7 (B)), and so-called two-point support is carried out. It will be gripped in the form of.

Next, an example of use in which steel pipe sheet piles are placed side by side on the bottom of the water by using the yatco 11 configured as described above will be described. 8th
The figure is a process explanatory drawing of this use example.

A large number of steel pipe sheet piles are driven on the water bottom 5 ′ located below the water surface 6.

In FIG. 8 (A), 8,8 ', 8 "are existing steel pipe sheet piles.

8a, 8b, 8c are steel pipe sheet piles that have been punched in this order and have not yet undergone post-treatment (removal of Yatco).

Reference numeral 11 denotes the yatco described with reference to FIG. 7. In this example of use, four yatco 11A, 11B, 11C, 11D were used in sequence.

The yatco 11A has not yet been removed while holding the steel pipe sheet pile 8a and driving the steel pipe sheet pile 8a.

The yatco 11B has not yet been removed while holding the steel pipe sheet pile 8b and driving the steel pipe sheet pile 8b.

The yatco 11C has not yet been removed while holding the steel pipe sheet pile 8c and driving the steel pipe sheet pile 8c.

The steel pipe sheet piles 8d to be placed side by side on the steel pipe sheet pile 8c are clamped by the chuck 11b of the yatco 11D, and the grip portion 11c of the yatco 11D is grasped by the chuck device 2 of the vibration device 1.

The vibration device 1 described above is mounted on a crane 9'through a rod swing suspension 10.
It is suspended by the pulley (only a part of the pulley and the wire rope is shown), and the top of the yatco 11C protruding above the water surface 6 is hung down as a target, and the steel pipe sheet pile 8d is attached to the sheet pile joint 11d of the yatco 11C. The joint 9 is engaged, and the steel pipe sheet pile joint 9 is hung while sliding along the sheet pile joint 11d.

With the Yatco 11C gripping the steel pipe sheet pile 8c, the sheet pipe joint 11d of the Yatco 11C and the steel pipe sheet pile joint 9 of the steel pipe sheet pile 8c.
Since the and are aligned in a straight line, the suspended steel pipe sheet pile
The steel pipe sheet pile joint 9 of 8d is slidably engaged with the steel pipe sheet pile joint 9 of the steel pipe sheet pile 8c from the sheet pile joint 11d of the Yatco 11C, as shown in FIG. 8 (B).

Furthermore, the yatco 11D and the steel pipe sheet pile 8d gripped by the yatco 11D are suspended, and the lower end of the steel pipe sheet pile 8d is attached to the water bottom 5 '.
(See FIG. 8 (C)), and the vibrating device 1 is operated to perform the vibration placing work.

In this way, the steel pipe sheet piles 8d are accurately positioned via the steel pipe sheet pile joints 9 with the steel pipe sheet piles 8c as the reference, and are arranged in rows and driven.

At this time, as described with reference to FIG. 7, the steel pipe sheet pile 8d
The thickness dimension of the chuck 11b of the Yatco 11D gripping the (horizontal dimension in FIG. 8) does not extend laterally from the body rod 11a of the Yatco 11D.
Work will proceed smoothly without interfering with 1C and steel pipe sheet pile 8c.

As shown in FIG. 8 (D), when the steel pipe sheet pile 8d is driven to a predetermined position, the operation of the vibration device 1 is stopped, the gripping of the chuck device 2 holding the yatco 11D is released, and As shown in FIG. 8 (E), the vibrating device 1 and the chuck device 2 attached thereto are lifted.

As shown in FIG. 8 (F), the above-mentioned chuck device 2 grips the yatco 11A, and the chuck 11b of the yatco 11A is gripped.
Release the grip of the steel pipe sheet pile 8a by the
Lift A by crane 9 '.

Yatco 11A chuck 11b lifted as above
As a result, as shown in FIG. 8 (G), a new steel pipe sheet pile 8e is grasped and lifted, and the yatco 11 protruding above the water surface 6
The top of D is hung down as a target.

Steel pipe sheet pile 8e steel pipe sheet pile joint 9 is Yatco 11D sheet pile joint 1
It is engaged with 1d, guided by the sheet pile joint 11d, slides down, and slides into the steel pipe sheet pile joint 9 of the steel pipe sheet pile 8d. In this way, the steel pipe sheet pile 8e is accurately guided to a position adjacent to the steel pipe sheet pile 8d.

Considering this FIG. 8 (G) in comparison with the above-mentioned FIG. 8 (B), the steel pipe sheet pile 8d to be placed in FIG. 8 (B) has already been placed in FIG. In the figure (G), a steel pipe sheet pile 8e to be placed next to (in parallel with) the steel pipe sheet pile 8d is about to be placed.

And in Fig. (B), it was used and not collected 3
Of the Yatco 11A, 11B, 11C in the book, the Yatco 11A that was the earliest used is being used again, (B)
The Yatco 11D that was in use in the figure is used and uncollected in the figure (G).

That is, the state shown in FIG. 8 (G) is a state in which the process of one cycle has advanced compared to the state shown in FIG. 8 (B).

In this manner, the four Yatco 11A, 11B, 11C, 11D are sequentially collected and reused, and again collected and reused, and a large number of steel pipe sheet piles 8e to 8e are placed side by side on the water bottom 5 '.

In this usage example, four Yatco were used in sequence,
When the yatco of the present invention is used, at least two yatco are sequentially and alternately used, and one yatco is always mounted on the already-cast steel pipe sheet pile, and the top thereof is projected onto the water surface 6 to cause the projection. The steel pipe sheet pile joint 9 of the steel pipe sheet pile 8 in the next process can be positioned and guided by the Yatco sheet pile joint 11d.

However, as in the use example shown in FIGS. 8 (A) to (G), using four YATCOs 11A to 11D, always use three or more YATCOs that have not been used yet and have already collected them on the existing sheet pile. When attached to the left side and left undisturbed, the three or more Yatco companions will be attached to the sheet pile joint 11
Since they are connected via d and are supported by each other, the resistance against waves is large and stable.

When driving a pile (meaning including sheet pile) using a vibration device,
A technique of suspending the vibrating device via a vibration-proof suspension is known. If this known technique is applied, the suspension force can be reduced (or reduced to zero) from the state in which the vibration device is suspended by the crane through the vibration-proof suspension device, and the vibration device can be operated to perform vibration driving. .

Therefore, in the state of FIG. 8C, the vibration driving can be performed while the crane 9 ′ and the vibration device 1 are connected to each other via the vibration-proof suspension device 10. As shown in FIG. 8 (F), the grip of the chuck device 2 of the vibration device 1 is released.
Like the above, the chuck device 2 can be changed to the Yatco 11A. The relationship between such operation and the configuration shown in FIG. 7 will be described below with reference to FIGS. 8 and 6.

FIGS. 6 (A) to 6 (F) schematically show the idea of an unknown invention method relating to the creation by the present inventor.
The equipment for doing this has been unfinished to date.

FIGS. 8 (A) to (G) schematically show the actual process at the stage when the idea of the above-mentioned invention method can be put into practice by using the Yatco for underwater pile driving according to the invention of the earlier application. Therefore, there is a slight difference between FIGS. 8 and 6 as described below.

In FIG. 6 (A), which shows the idea, the crane 9 directly suspends the yatco 7d, and FIG.
In (D), the crane 9 is separated from the yatco 7d, and the vibration device 1 is attached to the top of the yatco 7d. Then, in FIG. 6 (E), the crane 9 is used to leave the vibrating device 1 on the top of the yatco 7d.
Lifting 7a.

On the other hand, in the configuration of FIG. 7 which is an embodiment of the invention according to the prior application, the vibration-proof hanging device 10 suspended by the crane 9 ′ is used.
And the vibration device 1 suspended by the anti-vibration hanger 10 are firmly connected and cannot be easily attached and detached.

Then, the yatco 11 is adapted so that it can be gripped by fitting it to the chuck device 2 which is generally configured to grip a steel pipe pile (including a sheet pile).
A grip portion 11c is provided on the top of the.

In FIGS. 8 (C) and 8 (D) showing a construction method in which the Yatco 11 of this example is actually used, by the vibration device 1 which is still connected to the crane 9 ′ via the vibration-proof suspension device 10, The steel pipe sheet pile 8d that grips the yatco 11D via the chuck device 2 is vibrationally driven, and in FIG. 8 (E), the yatco 11D by the chuck device 2 is driven.
The gripping is released, the chuck device 2 is used to change to the Yatco 11A, and the Yatco 11A is lifted, as shown in FIG.

When the new steel pipe sheet pile 8e is grasped and hung down at a predetermined position by the suspended yatco 11A (FIG. 8 (G)), the steel pipe sheet pile 8e is ready for vibration driving through the yatco 11A.

As described above, in FIG. 6 (which shows an idea), the holding member is changed by the crane 9 in FIG. 8 (practical process), and the holding device is changed by the chuck device 2 in the same manner. The effect is achieved.

The main reason for enabling such a usage and achieving such an action and effect (see FIG. 7) is that the steel pipe sheet pile 8 can be detachably held by the chuck 11b provided with the lower end of the yatco 11. This is due to the structure and the structure in which the top of the yatco 11 can be detachably held by the chuck device 2 of the vibration device.

The reason why a large number of steel pipe sheet piles can be arranged and easily placed in the correct position is that the side wall of the yatco 11 is provided with a sheet pile joint 11d corresponding to the steel pipe sheet pile joint 9 of the steel pipe sheet pile 8.

[Problems to be Solved by the Invention]

As described above, according to the Yatco for water bottom pile driving work according to the invention of the prior application, a large number of steel pipe sheet piles can be arranged and driven to the water bottom, and the tops of the plurality of steel pipe sheet piles can be driven below the water surface. In addition, it was confirmed that the steel pipe sheet pile to be driven can be positioned quickly, easily and with high accuracy.

The inventors of the present invention further conducted a practical test of the underwater yatco for piled-up construction according to the invention of the above-mentioned prior application, and as a result, discovered that further improvement is desired.

Seventh Embodiment showing one embodiment of Yatco according to the invention of the prior application
The IX-IX cross section of FIG. 9B is as shown in FIG. 9A.

That is, when a plurality of steel pipe sheet piles 8 are arranged in a row in the X-axis direction, the chuck 11b (provided at the lower end of the Yatco 11) according to the invention of the prior application is opposed in the Y-axis and Y'-axis directions. Be positioned.

(This FIG. 9 is a schematic explanatory view and shows a steel pipe sheet pile joint 9
Is omitted).

Therefore, when a wave in the oblique direction collides with the yatco fixed by the chuck 11b on the steel pipe sheet pile 8, the yatco is tilted.

In order to withstand the force of such waves, it is conceivable to dispose two pairs of chucks 11b orthogonal to each other as shown in FIG. 9 (B). Then, chucks 11b cannot interfere with each other because they interfere with each other as shown by the spots.

Further, as shown in FIG. 9 (C), it is conceivable to radially install three chucks 11b for one yatco. However, according to this plan, the direction of the YATCO has to be considered when the YATCO is used in order, so that the construction management becomes extremely complicated.

Moreover, it is not easy to avoid the interference at the portions indicated by the reference symbol K because there is too little margin in terms of design and construction.

It was made in view of the above circumstances of the present invention, without further impeding the effect of the invention of the invention of the prior application, further improvement, i. ii. There is no possibility that the chucks of the Yatco fixed to each of the steel pipe sheet piles that are lined up will interfere with each other, and iii. When using the Yatco, there is no particular restriction on the direction of the Yatco. The purpose is to provide.

[Means for Solving the Problems]

The structure of the present invention created to achieve the above object can be extended with reference to FIG. 1 and FIG. 2 corresponding to the embodiment. “In order to pile a steel pipe sheet pile (8), In a YATCO that transmits vibration to a steel pipe pile by interposing it between the vibration device and the pile, a steel pipe sheet pile chuck device (11b) is provided at the lower end of the main body rod (11a) that is a tubular member. A gripping portion (11c) for gripping by the chuck device (2) of the vibrating device (1) is provided at the upper end of the main body rod, and along the side surface of the tubular main body rod (11a). In the longitudinal direction,
An expansion supporter (1d) provided with a pair of joints (11d) for steel pipe sheet piles and projecting downward from the chuck device (11b) for steel pipe sheet piles and inserted into the steel pipe sheet piles to support the yatco ( 21) is provided, and further, assuming three orthogonal X-, Y-, and Z-axes including the Z-axis forming the central axis of the body rod (11a), the pair of steel pipe sheet pile joints (11d). Are opposed to each other in the Y-axis direction, and the expandable supporter (21) includes two pairs of expansion levers (21a, 21b) that expand in a direction forming about 45 degrees with respect to both the X and Y axes. cage, Y-axis direction thickness W ₃ of the chuck device is characterized in that the is smaller than the diameter d ₁ of the steel pipe sheet pile (8).

The present invention was originally created as a YATCO for driving a steel pipe sheet pile, but the YATCO of the present invention is, as described above, provided with a joint (11d) for the steel pipe sheet pile on the side surface, so that its As a next effect, when the steel pipe sheet pile is driven using the yatco of the present invention, it becomes possible to omit the sheet pile joint to be provided in the steel pipe sheet pile. A steel pipe sheet pile without a sheet pile joint is generally called a steel pipe pile. Therefore, driving a steel pipe pile using the yatco according to the present invention also belongs to the technical scope of the present invention, and if implemented without justification, it constitutes an infringement of the patent right according to the present invention. [Operation] The Yatco provided with the supporter having the above-described configuration is fixed to the steel pipe pile by pressing the steel pipe pile to the inside instead of gripping the steel pipe pile from the outside. Therefore, there is no possibility that the supporters will interfere with each other between adjacent yatcoes.

Since the yatco is fixed to the steel pipe pile (including the sheet pile) as described above, there is no risk of the yatco falling down even if it receives waves from any direction.

〔Example〕

FIG. 1 shows an example of a yatco for water bottom pile driving work according to the present invention.

This embodiment is an improvement of the embodiment of the invention of the prior application shown in FIG. 7 by applying the present invention. FIG. 1 according to the present invention is the seventh embodiment of the invention of the prior application. It is a side view corresponding to a figure (B).

In FIG. 1, the same reference numerals as those in FIG. 7 (B) denote the same or similar components as in the invention of the previous application.

The present embodiment (FIG. 1) is different from the embodiment according to the prior application of FIG. 7 (B) in that an expandable supporter 21 is provided at the lower end of the yatco 11.

For example, brakes for vehicles include an external contraction type and an internal expansion type, which are publicly known. The expandable supporter according to the present invention has a structure similar to that of the internal expansion type brake. When the expandable supporter is inserted into the steel pipe sheet pile 8 and expanded, the expansion supporter is strongly pressed against the inner peripheral surface of the steel pipe sheet pile.

The expandable supporter 21 of this example includes two pairs of expansion levers 21a and 21a.
b is provided. The enlarged details of this section are shown in FIG.

FIG. 2 (A) is an enlarged detailed view of the II portion surrounded by the chain line in FIG. 1, and FIG. 2 (B) is BB of FIG.
FIG.

For convenience of description, orthogonal three axes X, Y, Z are assumed as shown in the figure. The Z axis is aligned with the center line of the body rod 11a of the Yatco 11. The direction in which the pair of sheet pile joints 11d provided on the body rod 11a face each other is defined as the Y axis. Therefore,
The X axis is defined as an axis orthogonal to both the Z axis and the Y axis.

One yatco is shown in FIG. 2 (B), and the steel pipe sheet pile 8 is hidden, but as can be easily understood from the fact that the sheet pile joints 11d are arranged in the Y-axis direction, a large number of steel pipe sheet piles and When a large number of YATCOs are arranged in a row, these steel pipe sheet piles and YATCOs are arranged in the Y-axis direction.

Reference numeral 11b is the same chuck as in the invention of the above-mentioned prior application, and has a structure capable of gripping and lifting the steel pipe sheet pile 8.

At the upper end of the steel pipe sheet pile 8, a plate 8p for guiding and reinforcing is provided along the surface including the center line thereof.

Reference numeral 22 denotes a pair of guides fixed to the lower end of the main rod 11a of the yatco 11 and is a member for guiding the yatco 11 concentrically with the steel pipe sheet pile 8.

As shown in FIG. 2 (A), a pair of expansion levers 21a, 21b
However, it is supported by a shaft 21c so as to be tiltable with respect to the lower end of the Yatco body rod 11a.

Each of the expansion levers 21a and 21b and the guide 22
A cylinder 21d is interposed between and.

The cylinder 21d is expanded and contracted by being supplied with hydraulic pressure via a hydraulic hose and an operating valve (neither of which is shown), and the expansion levers 21a and 21b are expanded and contracted as indicated by reciprocating arc arrows 21a 'and 21B'. Let Looking at this expansion direction in FIG. 2 (B), it is the direction of the bisector of the X, Y and both axes, that is, the direction forming 45 degrees with respect to both axes.

When the expansion levers 21a and 21b are contracted and inserted into the steel pipe sheet pile 8 to be expanded, the yatco 11 is supported so as to be concentric with the steel pipe sheet pile 8, that is, to maintain a straight line shape.

Here, the chuck 11b is locally crimped to the steel pipe sheet pile 8 and has a function of suspending the weight thereof, whereas the expansion levers 21a and 21b are provided on the inner surface of the steel pipe sheet pile 8. On the other hand, since it has a comparatively long contact length Lc, it has an excellent function of holding the attitude of the Yatco 11 with the steel pipe sheet pile 8 as a reference.

Specifically, it is as follows. That is, in a state in which the steel pipe sheet pile 8 is driven and fixed to the water bottom ground, the expandable supporter 21 supports the Yatco 11 concentrically with the steel pipe sheet pile 8, and the Yatco 11 and the steel pipe sheet pile 8 are aligned. It keeps them in a line and prevents them from bending in the direction of a dogleg.

In particular, as shown in FIG. 2, two pairs of expansion levers
Since 21a and 21b are squeezed at 45 degrees with respect to both X and Y axes, Yatco 11
Is not defeated.

Further, as described above, the one yatco shown in FIG. 2B is provided with another yatco (not shown) in a row in the Y-axis direction. In this case, since the thickness dimension W _{3 of} the chuck device in the Y-axis direction is smaller than the diameter dimension d ₁ of the steel pipe sheet pile 8, the chuck device does not interfere with the arrangement of a large number of Yatco in the Y-axis direction.

As can be easily understood from FIG. 1, the underwater pile driving construction Yatco of this example has a structure in which an extended type supporter is added to the embodiment (FIG. 7) of the underwater pile driving construction Yatco according to the invention of the prior application. Therefore, the peculiar effect in the invention of the prior application, namely, the advantage that "a large number of steel pipe sheet piles are lined up and placed on the bottom of the water and the tops thereof are driven below the surface of the water, and the steel pipe sheet piles can be easily positioned" is I have everything.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to the YATCO for water bottom pile driving work of the present invention, a large number of steel pipe sheet piles can be arranged and placed so that the tops thereof are below the surface of the water, and the steel pipe sheet piles to be placed can be positioned quickly and easily with high accuracy. In addition, there is no danger that the yatco will fall over regardless of the direction of the wave applied to the yatco, which has an excellent practical effect and contributes to the development of underwater pile driving work. It's a lot.

[Brief description of drawings]

FIG. 1 is a side view showing one embodiment of a water bottom pile driving yatco according to the present invention. FIG. 2 (A) is an enlarged detailed view of a part II of the Yatco of the above embodiment, and FIG. 2 (B) is a sectional view taken along line BB thereof. FIG. 3 is an explanatory view of a conventional pile driving method, in which (A) shows land driving and (B) shows water bottom driving. Fig. 4 (A),
(B) is explanatory drawing of the problem in the water bottom pile driving method in a prior art. FIG. 5 is an explanatory view of a steel pipe sheet pile joint, in which (A) shows a two-port joint, (B) shows a T joint, and (C) shows a pipe joint. 6 (A) to 6 (F) are explanatory views of an unknown water bottom pile driving method. FIG. 7 is an explanatory diagram of an embodiment of the invention according to the prior application. 8 (A) to 8 (G) are explanatory views of a method of using the embodiment according to the invention of the above-mentioned prior application. FIG. 9 is an explanatory diagram of a problem in the invention according to the above-mentioned prior application. 1 ... Vibration device, 2 ... Chuck device, 3,3 '... Flange joint, 4 ... Steel pipe pile, 5 ... Ground, 5' ... Underwater ground, 6 ... Water surface, 7 ... Conventional example Yatco, 8 …… Steel pipe sheet pile, 9 …… Steel pipe sheet pile joint, 10 …… Vibration-proof suspension, 11 …… Yatco of the embodiment, 11a …… Main body rod, 11b …… Chuck, 11
c …… grip, 11d …… sheet pile joint, 21 …… expandable supporter, 21a, 21b …… expansion lever, 21c …… axis, 21d …… cylinder, 22 …… guide.

Claims (1)

[Claims] 1. A yatco for interposing vibration between a vibrating device and a steel pipe sheet pile for transmitting a vibration to the steel pipe sheet pile in order to pile a steel pipe sheet pile (8), a main body rod (11a) which is a tubular member. Is provided with a chuck device (11b) for steel pipe sheet piles at the lower end thereof, and a gripping part (11c) for gripping with the chuck device (2) of the vibration device (1) is provided at the upper end of the main body rod. Is provided, along the side surface of the tubular body rod (11a) in the longitudinal direction,
An expansion supporter (1d) provided with a pair of joints (11d) for steel pipe sheet piles and projecting downward from the chuck device (11b) for steel pipe sheet piles and inserted into the steel pipe sheet piles to support the yatco ( 21) is further provided, and further, assuming three orthogonal X-, Y-, Z-axes including the Z-axis forming the central axis of the body rod (11a), the pair of joints (11d) for steel pipe sheet piles is provided. Are opposed to each other in the Y-axis direction, and the expandable supporter (21) includes two pairs of expansion levers (21a, 21b) that expand in a direction forming about 45 degrees with respect to both the X and Y axes. The thickness dimension W ₃ of the chuck device in the Y-axis direction is smaller than the diameter dimension d ₁ of the steel pipe sheet pile (8).