JPH0630222U - Reaction force stand for steel pipe pile punching machine - Google Patents

Abstract

(57) [Abstract] [Purpose] When the steel pipe pile punching machine is initially laid, the steel pipe pile punching machine is stably installed on the ground, and the reaction force at the time of initial laying is easily obtained. [Arrangement] An appropriate number of clamp insertion holes 3 having an inner diameter substantially equal to the inner diameter of the cast steel pipe pile P are arranged substantially linearly in the central portion of the flat plate-shaped pedestal body 2, and the pedestal support portions 4 on the side portions are arranged. Further, a support pile clamp portion 20 for sandwiching the temporarily driven support pile Q is provided. The support pile Q is sandwiched between the inner surface of the insertion hole 21 of the support pile clamp portion 20 and the piston 23 to stably install the gantry body 2. In this state, the clamp of the steel pipe pile punching and pulling machine is attached to the clamp insertion hole 3 to fix the steel pipe pile punching and pulling machine, and the steel pipe pile P is driven.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is to stably install a steel pipe pile punching machine on the ground at the initial setting of the steel pipe pile punching machine for driving or pulling a cylindrical steel pipe sheet pile or steel pipe pile into the ground. And a reaction force stand used to obtain a reaction force at the time of initial placement.

[0002]

[Prior art]

 Steel pipes, steel pipe sheet piles, and steel pipe piles (simply referred to as steel pipe piles in this specification) are used for river bank protection work, bridge construction, and other civil engineering work because of their strong bearing capacity and economic efficiency. It is widely used not only as a permanent structure but also as a temporary structure that cannot be covered with steel sheet piles, a temporary structure such as a deadline construction work, or a support pile. In order to drive these steel pipe piles, conventional methods such as the use of a vibro hammer, a hitting type, or a Nakabori type using an auger have been adopted.

[0003]

[Problems to be solved by the device]

 In the conventional method as described above, pollution such as noise and vibration occurs when the steel pipe pile is laid, and the equipment is large, which increases the work cost and poses a problem in terms of work efficiency. 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. It drives new steel piles while gaining strength.

This steel pipe pile punching / pulling machine cannot obtain the reaction force of the driving at the time of initial driving of the steel pipe pile because there is no existing pile. Therefore, an object of the present invention is to provide a reaction force platform that can reliably and reliably fix a steel pipe pile punching machine at the time of initial placement of the steel pipe pile punching machine, and can reliably obtain a driving reaction force.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the reaction force stand for a steel pipe pile punching and pulling machine of the present invention comprises a flat plate-shaped stand body having an appropriate weight, and an inner diameter of the cast steel pipe pile. It is characterized by arranging an appropriate number of clamp insertion holes having an inner diameter approximately equal to that of the above, and providing a holding mechanism on both sides for holding an existing support pile.

[0006]

[Action]

 The reaction force pedestal will be brought into the site where the steel pipe pile will be placed, and the existing support piles will be installed by sandwiching the existing support piles through the insertion holes of the gantry support parts provided on both sides of the reaction force pedestal. In this state, the clamp installed at the lower end of the steel pipe pile punching and pulling machine is inserted and installed in the clamp insertion hole of the reaction force platform to fix the steel pipe pile punching and pulling machine. Then, the steel pipe pile is held by the chuck device of the steel pipe pile punching and drawing machine and lowered to drive the steel pipe pile. At the time of this placement, the steel pipe pile punching / pulling machine can be stably placed on the reaction force stand, and a sufficient reaction force can be obtained.

[0007]

【Example】

 Hereinafter, the reaction force stand for a steel pipe pile punching / pulling machine of the present invention will be described based on the illustrated embodiment. FIG. 1 is a plan view of a reaction force base 1 according to an embodiment of the present invention, and FIG. 2 is a side view of the reaction force base 1. Reference numeral 2 in the figure denotes a gantry body formed in a flat plate shape. The gantry body 2 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 of the clamp insertion holes 3 is made substantially equal to the inner diameter of the steel pipe pile P. Is configured to be insertable. At the ends of the gantry body 2, both ends are extended in a direction parallel to the arrangement direction of the clamp insertion holes 3 to form a pair of gantry support parts 4. Further, the distance between the pair of gantry support portions 4 is set to be large enough for the steel pipe pile P to pass through.

The pedestal support portion 4 is provided with a support pile clamp portion 20 that holds the support pile Q that has been temporarily driven. The support pile Q in this embodiment is a U-shaped steel sheet pile, and an insertion hole 21 is formed on the side of the gantry body 2 so that two support piles Q can be inserted in a continuous state. In the figure, reference numeral 22 denotes a cylinder which is operated by a fluid pressure such as hydraulic pressure, and the piston 23 of the cylinder advances and retreats into the insertion hole 21, and the support pile Q inserted into the insertion hole 21 is inserted into the tip surface of the piston 23 and the insertion hole 21. Hold inside and out.

Then, this reaction force pedestal 1 is arranged so that the support piles Q which have been driven in advance at appropriate positions are inserted into the above insertion holes 21, or after the reaction force pedestal 1 is arranged, inside the insertion hole 21. The support pile Q is placed in the. Then, the cylinder 22 is operated to hold the support pile Q. In this state, the steel pipe pile punching / pulling machine 10 is fixed to this reaction force base 1, and the steel pipe pile P is driven.

In the reaction force pedestal 1 provided with the support pile clamp portion 20 as described above, even if the reaction force at the time of placing the steel pipe pile P is strong, the reaction force pedestal 1 may float or inadvertently move. Absent. In this embodiment, the support pile clamp portion 20 is provided on the gantry support portion 4, and this position is preferable in order to sufficiently counter the above reaction force. However, for example, when it is difficult to drive the support pile Q into the vicinity of the gantry support portion 4 due to the conditions of the work site, the support pile clamp portion 20 may be arranged on the side of the clamp insertion hole 3. Absent.

Next, an outline of the steel pipe pile punching and drawing machine 10 will be described with reference to FIG. FIG. 3 is a front view of the steel pipe pile punching and drawing machine 10. A slide base 12 that is slidable in the left-right direction with respect to the base 11 is provided above the base 11 and the upper surface of the slide base 12 is shown. A mast 13 is erected on this site. 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 using fluid pressure such as hydraulic pressure. The chuck device 14 is shown by a two-dot chain 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 cutting machine 10 is fixed on the reaction force base 1 by the clamps 15. The details of the clamp 15 are shown in FIGS. 4 (a) and 4 (b). In this clamp 15, a cylindrical gripping portion is divided into two to form a movable gripping portion 15b and a fixed gripping portion 15a having a substantially crescent-shaped cross section.

Two fluid pressure cylinders 15d are built in the grip portion, one on the top and one on the bottom. 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. At the same time, one end of the rod 15e of the fluid pressure cylinder 15d is fixed to the inner part of the recess 15c.

In use, the fluid pressure cylinder 15d is operated to extend the rod 15e to press the movable grip portion 15b against the inner wall surface of the steel pipe pile P. The rod 15e is further extended, and the movable gripping portion 15b is slightly moved outward (on the right side in FIG. 4) by the reaction force obtained from the inner wall surface of the steel pipe pile P, and the clamp 15 is moved to the steel pipe pile P. Fix it (see Fig. 4 (b)). In this state, the clamp 15 securely grips the steel pipe pile P1. When removing the clamp 15 from the steel pipe pile P, the gripped state is released by retracting the rod 15e of the fluid pressure cylinder 15d.

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 base 1 is made horizontal. The reaction pedestal 1 is installed so that the supporting pile Q, which is placed in an appropriate position in advance, can be inserted into the insertion hole 21, or after the reaction force pedestal 1 is installed, the support pile Q is inserted into the insertion hole 21. Place Q. Then, the cylinder 22 is operated to hold the support pile Q.

In this state, the clamp 15 of the steel pipe pile punching / pulling machine 10 is inserted into the clamp insertion hole 3 of the reaction force pedestal 1 and held on the reaction force pedestal 1, and the steel pipe pile punching / pulling machine 10 is mounted on the reaction force pedestal 1. After fixing, the slide base 12 is appropriately moved forward, and the steel pipe pile P to be driven is clamped by the chuck device 14 at an intermediate position between the pair of pedestal support parts 4, and the chuck device 14 is lowered to place the steel pipe pile P in the ground. It will be placed inside.

When the chuck device 14 reaches the lowest position of the mast 13, the holding state of the steel pipe pile P is loosened from the chuck device 14, 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 is lowered to further drive the steel pipe pile P completely into the ground.

In this case, since the pile punching / pulling machine 10 is securely fixed to the reaction force base 1 by the clamps 15 and the reaction force at the time of driving the piles P is sufficiently obtained, the piles P are reliably driven. It In the reaction force pedestal 1 provided with the support pile clamp portion 20 as described above, the reaction force pedestal 1 does not float up or inadvertently move even when the reaction force at the time of placing the steel pipe pile P is strong.

By repeating the above-described operation, the steel pipe piles P are successively placed in succession, and the pile punching / pulling machine 10 is advanced by one pitch by one pitch accordingly. 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 to hold the existing steel pipe pile P as described above, and the steel pipe pile punching machine 10 Will be fixed on the existing pile P.

In the above embodiments, the cradle main body 2 is provided with the three clamp insertion holes 3, but the number is equal to or more than the number of the clamps 15 provided in the steel pipe pile punching and drawing machine 10. It doesn't matter.

[0022]

[Effect of device]

 As described above, according to the reaction stand for the steel pipe pile punching and pulling machine of the present invention, the steel pipe pile can be initially set by fixing the steel pipe pile punching and drawing machine to the reaction stand. In addition, this reaction force platform is convenient to move, shortening the construction period and reducing the construction cost. Furthermore, regardless of the installation location of the reaction force platform, it is possible to freely select the location to start the steel pipe pile driving work. Therefore, it is possible to further improve work efficiency and work safety.

[Brief description of drawings]

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

FIG. 2 is a side view of an embodiment of the present invention.

[Figure 3] Front view of steel pipe pile punching and drawing machine

FIG. 4 is a sectional view of a clamp of a steel pipe pile drawing machine.

[Explanation of symbols]

 1 Reaction force base 2 Base main body 3 Clamp insertion hole 4 Support base 20 Support pile clamp part 21 Insertion hole 22 Cylinder 23 Piston P Steel pipe pile Q Support pile

Claims (1)

[Scope of utility model registration request] 1. An appropriate number of clamp insertion holes having an inner diameter substantially equal to the inner diameter of a cast steel pipe pile are provided in a flat plate-shaped gantry body having an appropriate weight, and existing support piles are held on both sides. A reaction stand for a steel pipe pile punching machine, which is equipped with a gripping mechanism.