JPH0720177Y2 - Reaction force stand for steel pipe pile punching machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a steel pipe pile punching / pulling machine for initially punching a steel pipe pile punching / pulling machine for driving or pulling a cylindrical steel pipe sheet pile or a steel pipe pile into the ground. The present invention relates to a reaction force stand that is stably installed on the ground and used to obtain a reaction force at the time of initial placement.

[0002]

2. Description of the Related Art Steel pipes, steel pipe sheet piles, and steel pipe piles (in the present specification, simply referred to as steel pipe piles) are used for their strong bearing capacity and economical efficiency in river bank protection works and civil engineering works such as bridges. It is widely used not only for permanent structures such as revetment bridge construction, but also as temporary structures or support piles for mountain retaining and deadline construction that cannot be covered with steel sheet piles. In order to drive these steel pipe piles, conventionally, construction methods such as the use of a vibro hammer, a hitting type, or a Nakabori type using an auger have been adopted.

[0003]

With the above-mentioned conventional method, pollution such as noise and vibration occurs when the steel pipe pile is driven, and the equipment is large, which increases the work cost and poses a problem in terms of work efficiency. It was Therefore, the present inventor has devised a static load type steel pipe pile punching and drawing machine. This steel pipe pile punching machine grips the upper end of an existing steel pipe pile with a clamp provided at the lower end of the steel pipe pile punching machine when the steel pipe pile is driven, and fixes the steel pipe pile punching machine on the steel pipe pile. The new steel pipe pile is driven in while obtaining power.

In this steel pipe pile punching and drawing machine, when the steel pipe pile is initially placed, there is no existing pile, so that the reaction force of the placement cannot be obtained. Therefore, an object of the present invention is to provide a reaction force platform that can surely and easily fix the steel pipe pile punching and pulling machine at the time of initial placement of the steel pipe pile punching and pulling machine and can surely obtain the driving reaction force.

[0005]

Means for Solving the Problems In order to achieve the above object, a reaction force stand for a steel pipe pile punching and drawing machine of the present invention comprises a flat plate body having an appropriate weight and an inner diameter of a cast steel pipe pile. The present invention is characterized in that a proper number of clamp insertion holes having substantially the same inner diameter are provided and a support mechanism is rotatably arranged at the front and rear ends.

[0006]

[Operation] The reaction force platform is carried into the site where the steel pipe pile is to be placed, and the front support portion and the rear support portion provided at the front and rear side end portions of the reaction force platform are projected and installed from the reaction force platform. In this state, the clamp provided at the lower end of the steel pipe pile punching and pulling machine is inserted and mounted in the clamp insertion hole of the reaction force base to fix the steel pipe pile punching and pulling machine. Then, hold the steel pipe pile in the chuck device of the steel pipe pile punching and drawing machine,
The steel pipe pile is driven down. At the time of this driving, the steel pipe pile punching / pulling machine can be stably placed on the reaction force stand, and a sufficient reaction force can be obtained. In particular, when the reaction force is insufficient, the weight can be placed on the supporting portions at the front and rear side end portions of the reaction force mount.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The reaction pedestal for a steel pipe pile punching / pulling machine according to the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a perspective view of a reaction force base 1 according to an embodiment of the present invention.
Has a sufficient weight to counter the reaction force received when the steel pipe pile P is driven by the steel pipe pile punching / pulling machine 10 fixed thereto.

Three holes are formed in the central portion of the gantry body 2 to form the clamp insertion hole 3. These clamp insertion holes 3 are arranged in a substantially straight line, and the inner diameter thereof is set to the steel pipe pile P.
The clamps 15 of the steel pipe pile punching / extracting machine 10 to be described later can be inserted into the respective clamp insertion holes 3 by making the inner diameters of the clamps approximately equal to the inner diameters.

A front support portion 4a and a rear support portion 4b are provided at the side ends of the gantry body 2 as gantry support portions.
The front side support portion 4a and the rear side support portion 4b are mounted on the gantry body 2
It is attached via a pin 25 to the gantry body 2 about the pin 25 as an axis.

As described above, the front support portion 4a and the rear support portion 4 are
b is rotatable with respect to the gantry body 2, so that, for example, when there is an obstacle in the front and the front support portion 4a cannot be projected, this is rotated so as to be parallel to the obstacle. Then, the reaction force base 1 can be installed. Along with this, the weight can also be placed on the support portion while avoiding obstacles.

Further, with both the front side support portion 4a and the rear side support portion 4b rotated in parallel to the obstacle, an appropriate weight is placed on the front side support portion 4a and the rear side support portion 4b. By doing so, the force against the reaction force at the time of driving the steel pipe pile P can be further increased. Further, in the reaction force mount of this embodiment, since the front support part 4a and the rear support part 4b can be removed from the mount body 2, it becomes compact during transportation and storage.

As described above, in the reaction force platform 1 in which the front side support portion 4a and the rear side support portion 4b are provided at the end portions on the side of the reaction force platform 1, if the reaction force is insufficient, the front and rear side support portions are appropriately arranged. It is possible to prevent the reaction force pedestal 1 from being lifted up by mounting the weight of the.

Next, the steel pipe pile punching and drawing machine 10 will be described with reference to FIG.
Will be outlined. FIG. 2 is a front view of the steel pipe pile punching / pulling machine 10. A slide base 12 is provided on the base 11 so as to be slidable with respect to the base 11 in the left-right direction in the figure. A mast 13 is erected on this. In front of the mast 13, a chuck device 14 which is slidable in the vertical direction with respect to the mast 13 is provided by utilizing fluid pressure such as hydraulic pressure. The chuck device 14 is shown by a chain double-dashed line in FIG. Hold the steel pipe pile P.

On the other hand, an appropriate number of clamps 15 are provided on the lower surface of the base 11, and the steel pipe pile punching and drawing machine 10 is fixed on the reaction frame 1 by the clamps 15. The details of the clamp 15 are shown in FIGS. In this clamp 15, a cylindrical grip portion is divided into two to form a movable grip portion 15b and a fixed grip portion 15a each having a substantially crescent cross section.

Two fluid pressure cylinders 15d are built in the upper and lower portions of the grip portion. The end of the fluid pressure cylinder 15d is fitted and fixed in the recess formed in the movable grip portion 15b, while the fluid pressure cylinder 15d is slidably fitted in the recess 15c formed in the fixed grip portion 15a. One end of the rod 15e of the pressure cylinder 15d is fixed to the inner part of the recess 15c.

In use, the fluid pressure cylinder 15d is operated and the rod 15e is extended to press the movable gripping portion 15b against the inner wall surface of the steel pipe pile P. Further, the rod 15e is extended, the movable gripping portion 15b is slightly moved outward (right side in FIG. 3) by the reaction force obtained from the inner wall surface of the steel pipe pile P, and the clamp 15 is fixed to the steel pipe pile P. (See FIG. 3B). Clamp 15 in this state
Securely grips the steel pipe pile P1. In addition, from the steel pipe pile P,
When removing the clamp 15, the fluid pressure cylinder 15d
The gripped state is released by retracting the rod 15e.

The operation of the present embodiment configured as described above will be described below. The reaction force platform 1 is installed at a work site where the steel pipe pile P is initially placed. At this time, the upper surface of the reaction force base 1 is made horizontal. At this time, if there is an obstacle ahead and the front support portion 4a cannot be projected, the front support portion 4a is rotated and installed so as to be parallel to the obstacle. When the reaction force at the time of driving the steel pipe pile P is large, an appropriate weight may be placed on the rear support portion 4b. Further, it is possible to rotate the front support portion 4a and the rear support portion 4b on both sides of the reaction force base 1 and mount the weight on them.

Clamp insertion hole 3 of the installed reaction force stand 1
The clamp 15 of the steel pipe pile punching / pulling machine 10 should be inserted and held on the reaction force base 1, the steel pipe pile punching / pulling machine 10 should be fixed to this reaction force base 1, and the slide base 12 should be appropriately moved forward and driven. The steel pipe pile P is held by the chuck device 14, and the chuck device 14 is lowered to drive the steel pipe pile P into the ground.

When the chuck device 14 reaches the lowest position of the mast 13, the holding condition of the steel pipe pile P is loosened from the chuck device 14 and only the chuck device 14 is raised, and the steel pipe pile P is again held by the chuck device 14. The chuck device 14
And the steel pipe pile P is completely driven into the ground.

In this case, the pile punching / pulling machine 10 includes the clamp 1
5 is securely fixed to the reaction force base 1, and the weight is mounted on the front side support portion 4a and the rear side support portion 4b protruding from the reaction force base 1, so that the reaction force at the time of placing the steel pipe pile P is sufficient. Therefore, the steel pipe pile P can be reliably driven. In the reaction force pedestal 1 provided with the front side support portion 4a and the rear side support portion 4b as described above, even if the reaction force deficiency occurs when the steel pipe pile P is laid,
Does not float or move carelessly.

By repeating the above operation, the steel pipe piles P are successively placed one after another, and the pile punching machine 10 is accordingly driven.
To move forward one pitch at a time. Then, when the clamp 15 is disengaged from the reaction force base 1 and positioned forward,
The clamp 15 is inserted into the existing pile P, the existing steel pipe pile P is held as described above, and the steel pipe pile punching machine 10 is fixed on the existing pile P.

In the above embodiment, the cradle body 2 is provided with the three clamp insertion holes 3. However, the number of the clamps 15 provided in the steel pipe pile punching machine 10 is equal to or more than that. I don't mind.

[0023]

As described above, according to the reaction force stand for the steel pipe pile punching and pulling machine of the present invention, the steel pipe pile punching and pulling machine is fixed to the reaction force stand to perform the initial driving of the steel pipe pile. You can In addition, this reaction force platform is convenient to move, so that the construction period can be shortened and the construction cost can be reduced. Further, regardless of the installation location of the reaction frame, it is possible to freely select the location where the steel pipe pile driving work is started. Further, by mounting the weight on the support portion, it is possible to eliminate the lack of reaction force. Therefore, it is possible to further improve work efficiency and work safety.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

[Fig.2] Front view of steel pipe pile punching machine

FIG. 3 is a sectional view of a clamp of a steel pipe pile punching and drawing machine.

[Explanation of symbols]

 1 Reaction force pedestal 2 pedestal body 3 Clamp insertion hole 4a Front support 4b Rear support 25 pins

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped gantry body having an appropriate weight is provided with an appropriate number of clamp insertion holes having an inner diameter substantially equal to the inner diameter of a cast steel pipe pile, and a support mechanism is pivoted at the front and rear end portions. A reaction stand for a steel pipe pile punching machine characterized by being freely configured.