JPH10252066A - Execution jig for concrete sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig capable of driving the head section of a sheet pile to the ground surface or below the ground surface by burying inserts into the head section of the concrete sheet pile, and screwing and fixing a grip member to the inserts. SOLUTION: A grip member 2 bored with bolt holes is overlapped on the head section of a concrete sheet pile 1, bolts 4 are inserted into the bolt holes and screwed to the inserts buried at the top end of the concrete sheet pile 1, and the grip member 2 is fixed to the concrete sheet pile 1. The portion of the grip member 2 is gripped by the chuck of an execution machine, the concrete sheet pile 1 is driven by a vibratory hammer, then the grip member is removed. When existing sheet piles are used as reaction force like in the press-in construction method, the grip members 2 are left fitted to multiple sheet piles used as the reaction force, and the press-in construction method can be coped with. When the grip members 2 are merely removed after execution, the sheet piles can be buried at the same height as that of the ground surface or at the position lower than the ground surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete sheet pile working jig which can be driven into the ground or below the surface, which has not been conventionally possible.

[0002]

2. Description of the Related Art
In the construction of concrete sheet piles, the upper part (head) of the sheet pile was gripped with a chuck and driven into the soil, so that the head of the sheet pile came out above the ground surface.

FIG. 4 (a) is a front view of a conventional method in which the head of a concrete sheet pile is gripped by a chuck and driven by a vibrohammer connected to a wire, and FIG. 4 (b) is a side view. As can be seen in this example, the chucking allowance always remains on the ground.

FIG. 5 is a view of driving a concrete sheet pile with a hydraulically operated concrete piler according to a conventional method. The side of the concrete sheet pile is gripped with a chuck, and is driven to a certain depth by hydraulic pressure. As is clear from this example, the head of the concrete sheet pile remains on the ground surface.

[0005] As described above, in the conventional method, the top end of the sheet pile cannot be driven to the ground surface or below the ground surface. Therefore, if the top of the sheet pile must be at the same height as the ground surface or lower (deeper) than the ground surface, the head of the sheet pile is cut down or the ground where the sheet pile is driven is dug in advance, It was necessary to backfill only the part dug down after construction.

FIG. 6 (a) is a view in which a concrete sheet pile has been dug down to a predetermined depth in advance.
(B) is a side view thereof.

The present invention provides a jig capable of driving the head of a sheet pile, which could not be done conventionally, to the ground surface or below the ground surface.

[0008]

A jig for concrete sheet pile embedding, wherein an insert obtained by cutting a female screw is buried in the head of the concrete sheet pile, a gripping member is superimposed on the concrete sheet pile, and a bolt provided on the gripping member is provided. A construction jig for a concrete sheet pile characterized in that a bolt is inserted into a hole and screwed and fixed to an insert buried in the concrete sheet pile.

Next, the operation will be described.

[0010] A gripping member portion, which is mounted on the head of a concrete sheet pile by bolts, is gripped by a chuck of a construction machine, and after driving the sheet pile, the gripping member is removed, so that the top end of the sheet pile is at the same height as the ground surface. Or lower than the surface. When an existing sheet pile is used as a reaction force as in the press-fitting method, the press-fitting method can be dealt with by leaving the gripping members attached to several sheet piles used as the reaction force.

Even if the thickness of the concrete sheet pile changes, the gripping member can be used by adjusting the position of the insert buried in the concrete sheet pile. Further, when the sheet thickness is large, in the conventional hydraulically operated concrete piler, the stroke of the chuck for gripping the sheet pile needs to be larger than the concrete thickness of the sheet pile, so that the concrete piler tends to be large. However, if the jig of the present invention is used, the concrete piler can be reduced in size because the gripping member is thinner than the thickness of the concrete sheet pile.

[0012] Since the portion to be gripped by the chuck of the construction machine is not the portion of the concrete sheet pile but the gripping member, there is no possibility that the head of the concrete sheet pile will be lost.

Conventionally, the gripping members are connected by welding a plate buried in the head of the concrete sheet pile. However, since a separate plate or the like can be used to connect by bolting, the jig is damaged. It is easy to remove and attach.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete sheet pile construction jig according to the present invention will be described below with reference to the drawings.

FIG. 1A is an overall view of a concrete sheet pile 1 of the present invention with a gripping member 2 superimposed on the head thereof. Reference numeral 3 denotes a bolt hole formed in the gripping member 2. The gripping members need not necessarily have the same cross section as the concrete sheet pile.
(B) is a detailed view in which the gripping member 2 is attached to a concrete sheet pile. (C) is a top view of (b).

Reference numeral 5 denotes an insert which is embedded in the head of the concrete sheet pile and is formed by cutting a female screw. Reference numeral 4 denotes a bolt which is screwed to the insert 5 and attaches the gripping member 2 to the concrete sheet pile. FIG. 2A is a front view in which the gripping member 2 is gripped by the chuck 7 and the concrete sheet pile is driven by the vibro hammer 6. Concrete sheet pile 1 on the left
Has already been removed. (B) is a side view thereof.

FIG. 3 shows a state in which the side surface of the gripping member 2 is gripped with a hydraulically operated concrete piler 8 and driven by a predetermined stroke, the position where the gripping member 2 is gripped like a snake is raised, and the driving is performed again. FIG. The concrete piler 8 uses a hydraulic cylinder, and the reaction force at the time of driving is obtained by gripping the gripping member 2 left on the adjacent concrete sheet pile 1. The gripping member 2, which is not entrusted to obtain a reaction force, is removed and diverted to another.

[0018]

The present invention has the above-described structure and has the following effects.

Conventionally, the top end of a sheet pile has the same height as the ground surface,
Or, if it is lower than the ground surface, cut the sheet pile to the specified height after construction, or dug in advance the place where the sheet pile will be constructed, and refill it after construction.

It was necessary. In the case of (1), not only the length of the sheet pile is required to be longer than a predetermined length, but also the cost and construction period for cutting the sheet pile are required. In other cases, the construction site is dug down before construction, and backfilling is required after construction, which also requires extra cost and construction time.

By using the concrete sheet pile construction jig of the present invention, after construction, the sheet pile can be embedded at the same height as the ground surface or at a position lower than the ground surface simply by removing the gripping member. The removed gripping member and bolt can be used for driving the next sheet pile, and a simple and economical sheet pile execution method can be realized.

Even if the thickness of the concrete sheet pile changes, the gripping member can also be used by adjusting the position of the insert buried in the concrete sheet pile. Further, when the sheet thickness is large, in the conventional hydraulically operated concrete piler, the stroke of the chuck for gripping the sheet pile needs to be larger than the concrete thickness of the sheet pile, so that the concrete piler tends to be large. However, if the jig of the present invention is used, the concrete piler can be reduced in size because the gripping member is thinner than the thickness of the concrete sheet pile.

The portion to be gripped by the chuck of the construction machine is not a part of the concrete sheet pile but a gripping member, so that there is no possibility that the head of the concrete sheet pile is damaged.

Conventionally, the grip members are connected by welding a plate buried in the head of the concrete sheet pile. However, since another plate or the like can be used to connect the bolts by bolting, the jig is damaged. It is easy to remove and attach.

[Brief description of the drawings]

FIG. 1 (a) is an overall view of a concrete sheet pile 1 of the present invention with a gripping member 2 superimposed on the head thereof. (B) is a detailed view in which the gripping member 2 is attached to a concrete sheet pile.
(C) is a top view of (b).

FIG. 2A is a front view in which a gripping member 2 is gripped by a chuck 7 and a concrete sheet pile is driven by a vibratory hammer 6; (B) is a side view thereof.

FIG. 3 is a diagram showing a state in which the side surface of the gripping member 2 is gripped by a concrete piler 8, driven for a predetermined stroke, the gripping position of the gripping member 2 is raised like a snake, and the driving is performed again.

FIG. 4 (a) is a front view of a conventional method in which the head of a concrete sheet pile is gripped with a chuck and driven with a vibro hammer connected to a wire, and FIG. 4 (b) is a side view.

FIG. 5 is a view of driving a concrete sheet pile with a concrete piler according to a conventional method.

FIG. 6 (a) is a diagram in which a concrete sheet pile has been dug down to a predetermined depth in advance, and FIG. 6 (b) is a side view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Concrete sheet pile 2 ... Grip member 3 ... Bolt hole 4 ... Bolt 5 ... Insert 6 ... Vibro hammer 7 ... Chuck 8 ... Concrete piler

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokihiko Yoneda 4-3-3 Shiba, Minato-ku, Tokyo Inside Geostar Co., Ltd. (72) Inventor Seio Kitamura 3948-1, Fushida, Kochi City, Kochi Prefecture Inside Giken Seisakusho Co., Ltd.

Claims (1)

[Claims] 1. A concrete sheet pile construction jig, wherein an insert obtained by cutting a female screw is buried in the head of the concrete sheet pile, a gripping member is superimposed on the concrete sheet pile, and bolts are inserted into bolt holes provided in the gripping member. A concrete sheet pile construction jig, which is inserted and screwed and fixed to an insert embedded in the concrete sheet pile.