JPH0226016B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pile press-in method, and more specifically, a pile press-in machine having a clamp for clamping existing piles and a pile press-fit chuck is used. This method relates to a pile press-in construction method in which the piles are placed on top of the pile, and the reaction force at the time of pile press-in is obtained from the existing piles, and the piles are sequentially press-fitted while moving on the pile row.

(Prior art) Conventionally, in the pile press-in method using a pile press-in machine having a clamp that clamps an existing pile and a pile press-in chuck, when press-fitting a new press-in pile, the pile press-in machine is lifted up by a large crane, etc. , a construction method is used in which the pile is moved forward by one pitch and the next pile following the existing pile is press-fitted.

(Problem to be solved by the invention) This construction method requires a lifting machine such as a crane because the space above the site is limited, such as under a river bridge or overpass overhead wire, or there are buildings nearby. If it is not installed, the pile press-in machine will not be able to move and pile press-in construction will be impossible. In addition, it has become impossible to press-in piles at sites where it is difficult or impossible for cranes to enter, such as on water or in wetlands.

Furthermore, with this conventional method, the press-in machine must be lifted and moved by a crane each time one pile is press-in, which requires a large number of workers to press-in the pile, takes time, and reduces work efficiency. It was bad.

It is an object of the present invention to eliminate the drawbacks of the above-mentioned conventional techniques, and to provide a pile press-in method that is not restricted by the environment of the work site and can quickly press-fit piles with a small number of workers.

(Means for Solving the Problems) In order to achieve the above object, the pile press-in method of the present invention includes a saddle equipped with a clamp at the lower part for holding the existing pile, and a saddle for at least one pitch of the existing pile in the front and back direction. a slide base movably provided on the saddle and having a mast erected on the top surface;
A pile press-in method using a pile press-in machine having an elevating body that can slide up and down along the mast and is equipped with a chuck for holding the pile, in which the pile press-in machine is fixed by clamping a clamp on the existing pile, and the chuck is After holding the press-fit pile with the chuck and press-fitting the press-fit pile by connecting it to the front end of the existing pile by obtaining a press-fit reaction force from the existing pile, the slide base is moved forward by one pitch of the pile, and the new press-fit pile is clamped in the chuck. Position the press-fit pile in connection with the existing pile at the front end, lower the chuck to press-fit the press-fit pile to an appropriate depth, then temporarily stop press-fitting the pile, and open the clamp holding the existing pile. The method is characterized in that after the saddle is raised and the pile is advanced by one pitch, the saddle is lowered and the existing pile is clamped with a clamp, and the chuck is lowered again to completely press-fit the press-fit pile.

(Example) Next, an example of the present invention will be described based on the accompanying drawings. In the drawings, FIG. 1 is a front view of a pile press-in machine used in the construction method of the present invention, and FIG. 2 is a plan view thereof.

First, the configuration of the pile press-in machine A used in this embodiment will be explained.

The pile press-in machine A includes a saddle 4 equipped with a plurality of clamps 2, 2... at the lower part for clamping a plurality of existing piles 1, 1... pressed into the ground in parallel, and a saddle 4 in front of the saddle 4. It has a chuck 3 for holding piles.

The clamp 2 and the chuck 3 may be of a structure known per se, and the chuck 3 may be of a well-known structure.
It is possible to use the general method of constructing piles in a zigzag pattern, in which the orientation of the piles is sequentially changed by 180 degrees as shown in FIG. 9.

A saddle is provided on the saddle 4 so as to be movable by at least one pitch of the existing pile 1 in the parallel direction (back-and-forth direction) A slide base 5 is mounted thereon, and a mast 6 is erected on the slide base 5.

In front of the mast 6, there are guide rails 7, 7.
An elevating body 8 is provided with a chuck 3 which is slidable up and down along the clamp 2 and can be lowered to a height position adjacent to the clamp 2 while clamping the press-fit pile. This elevating body 8 is attached with a cylinder 9a of a hydraulic plunger/cylinder device 9 for pile press-fitting, and is also movable in the left and right directions with respect to the slide base 5. This mobility may be imparted, for example, by using a turntable type slide base 5.

The construction method of the present invention using the above-mentioned pile press-in machine A will be explained based on FIGS. 5 to 8.

First, clamp 2 on top of the existing pile 1, 1...
2 and fix the pile press-in machine A.

The press-fitting pile 1-b is held between the chucks 3 and the existing piles 1, 1... are used as press-fitting reaction force to push the existing pile 1
It is connected to the front end and press-fitted to the same height as the existing pile 1 (see Fig. 1), and this pile 1-b is used as a moving pile.

Next, the chuck 3 is moved by one pitch by moving the slide base 5 forward by one pitch of the pile, and the press-fit pile 1-a is held in the chuck 3 and positioned adjacent to the moving pile 1-b at the front end. 3 is lowered and the press-fit pile 1-a is press-fitted to an appropriate depth (see FIG. 5).

Next, the press-fitting of the press-fit pile 1-a is temporarily stopped, and while the chuck 3 is holding the press-fit pile 1-a,
Release the clamping state of the clamp 2 that is clamping the existing pile 1, raise the saddle 4 (clamp 2) to an appropriate height (see Figure 6), and then move the saddle 4 forward by one pitch of the pile (No. 7). (see figure).

In this case, the lower end of the clamp 2 is raised to a position above the top of the existing pile 1 in order not to hinder the forward movement of the clamp 2, but the lower end of the clamp 2 is raised to a position above the top end of the existing pile 1. If it has a pile shape, it is sufficient for the saddle 4 to rise slightly.

Next, the saddle 4 is lowered and the moving pile 1-b is moved.
and clamp the existing piles 1, 1 with clamps 2, 2... (see Figure 8).

Once the press-fitting machine A is fixed onto the existing pile by the clamp 2, the chuck 3 is lowered again using the piles 1, 1, . Press in completely.

This press-fitting pile 1-a becomes the moving pile when the next press-fitting pile is press-fitted, and by repeating this operation, the pile press-fitting machine is moved to the existing piles 1, 1...
...Piles can be press-fitted one by one while the top is running on its own. Note that the pile is pulled out in the reverse order to the above.

(Effects of the Invention) As described above, the present invention allows the pile press-in machine to press-in piles sequentially while running on the existing pile rows, so it is not restricted by the environment of the work site, and moreover, the piles can be quickly installed with a small number of workers. It has the advantage of being able to press-fit.

[Brief explanation of drawings]

The drawings show examples of the present invention, and FIG. 1 is a front view of a pile press-in machine used for carrying out the present invention.
Figure 2 is a plan view of the same, Figure 3 is a right side view, Figure 4 is a left side view of the same, Figures 5 to 8 are explanatory diagrams showing the sequence of the pile press-in method, and Figure 9 is a U-shaped pile. FIG. 3 is a plan view showing a press-fitted state. A...Pile press-in machine, 1...Pile, 1-a...
...Press-fit pile, 2...Clamp, 3...Chuck, 4...Saddle.

Claims (1)

[Scope of Claims] 1. A saddle equipped with a clamp at the bottom for holding an existing pile, and a saddle provided on the saddle so as to be movable in the front-back direction by at least one pitch of the existing pile,
A pile press-in method using a pile press-in machine that has a slide base with a mast installed on the top surface, and an elevating body that can slide up and down along the mast and is equipped with a chuck for clamping the pile, and is clamped onto the existing pile. , fix the pile press-in machine, clamp the press-fit pile with the chuck, connect the press-fit pile to the front end of the existing pile using pressure-fit reaction force from the existing pile, press-fit it, and then move the slide base forward by one pitch of the pile. Hold the new press-fit pile in the chuck, position the press-fit pile by connecting it to the existing pile at the front end, lower the chuck and press-fit the press-fit pile to the appropriate depth, then stop press-fitting the pile once, and replace the existing pile. Release the clamp that is holding the pile, raise the saddle and move the pile forward by one pitch, then lower the saddle and clamp the existing pile with the clamp, then lower the chuck again and press-fit the press-fit pile completely. The pile press-in method is characterized by: