JPS61250222A - Method and apparatus for connection of pile - Google Patents

Abstract

PURPOSE:To raise the efficiency of operations by a method in which a connecting pile is held by the chuck of a penetrator and fitted with a coupler metal fixed to the upper end of a pile, and a hole is drilled in the pile and thrust with a connector to connect the pile with the coupler metal. CONSTITUTION:A press-fit pile 4 is driven into the ground by a chuck 4 and then penetrated when the upper end of the pile 5 reaches the upper end of an existing pile P. The chuck 4 is released from the pile 4 and raised, and a coupler metal 9 is attached to the upper end of the pile 5. A connecting pile 6 is held by the chuck 4 and lowered, the lower end of the pile 6 is fitted with the upper part of the metal 9, and a cylinder 41 is loosened to release the holding of the pile 6. The chuck 4 is then lowered, and a drawing cylinder 42 is lowered until it is matched with the pit of the metal 9. The cylinder 42 is operated, a rod 43 is extended to drill a hole in the pile 5, a caulking material 8 is penetrated into the hole, a caulking cylinder 44 is matched with the hole of the pile 5 and the hole of the metal 9, and the rod 45 is operated to clamp the material 8.

Description

[Detailed Description of the Invention] (Industrial Application Field) When driving steel piles such as steel sheet piles into the ground while adding them, the present invention is applicable to the previously driven piles and the newly driven piles (joint piles). The present invention relates to a method and apparatus for adding piles that facilitates the work of adding joints to both piles by attaching a joint fitting between the two piles and fixing the fitting to both piles.

(Prior Art) Steel piles such as steel sheet piles are continuously driven into the ground and used for construction or civil engineering work. When driving piles with flat, groove-shaped, or Z-shaped cross sections into the ground, piles of normal length should be used if the bedrock serving as the foundation for construction is deep or there is an obstacle above the driving point. If this is not possible, a method is used in which short piles are added and the piles are driven to the desired depth.

In the conventional method of adding piles, a flat reinforcing plate 10 was used, as shown in FIG. This method of adding piles involves placing a pair of flat reinforcing plates 1
0.10 is fixed by welding or bolting, and the lower end of the connecting pile P2 is newly clamped to the flat plate reinforcing plate 10 of the driven pile P1, and the flat plate reinforcing plate 10 and the connecting pile P2 and - are welded. Alternatively, piles were added by tightening bolts.

(Problems to be Solved by the Invention) In the conventional work method as described above, it takes time and effort to fix two reinforcing plates to the upper end of the pile before the pile press-fitting work, and
It was necessary to secure welding equipment and workers. Furthermore, it is necessary to install scaffolding along the piles to perform the work of fixing the joint piles and reinforcing plates, but this is difficult to do, such as when driving piles into the slope of an embankment on a railway line or into a river during bank protection work. In some cases, it was difficult to secure scaffolding for work.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned circumstances, and consists of fixing a separate joint fitting to the upper end of the driven pile, and press-fitting the joint pile into the upper part of the joint fitting. After the pile is clamped and fitted in the chuck of the machine, a hole is bored in the pile using the punching cylinder configured in the chuck, and then a connecting tool such as caulking material or a bolt is inserted into the hole, and this connecting tool is used. The purpose is to improve the efficiency of the pile joining process.

(Operation) When the upper end of the press-in pile reaches the vicinity of the upper end of the existing pile row,
Temporarily stop the pile press-in work. Next, the lower part of the pile joint fitting is fitted onto the upper end of the above-mentioned driven pile, and the joint pile is pushed into the chuck of the press-in puller and lowered, and the lower end of the joint pile is fitted into the upper part of the above-mentioned joint metal fitting. do.

Next, only the chuck is lowered to the joint between both piles, the rod position of the punching cylinder built into the chuck is aligned with the drilling position, and the cylinder is used to penetrate the piles and drill a hole. Thereafter, the connecting tool is inserted into the perforated position, and the joint fitting and the stake are fixed by caulking means or bolt tightening. By doing this for both the upper and lower piles, both piles are joined together and become a single piece. Embodiments of the present invention will be described below based on the drawings.

(Embodiment) In the drawings, FIG. 1 is a front view showing an embodiment of the pile addition device according to the present invention, and FIG. 2 is an enlarged sectional view illustrating the action of the cylinder in the chuck.

1 is the press-in machine main body, and in this embodiment, the press-in machine main body 1 is supported on the top of the existing piles P, P, etc. by clamps 3, 3, etc., but not limited to the embodiment B, it can be fixed on the ground. It may be a type of vehicle or one mounted on a trackless vehicle. In front of the mast 2 of the press-fitting machine main body 1, a chuck 4 that clamps a pile and press-fits it into the ground is configured to be movable up and down with respect to the mast 2.

This chuck 4 includes a pile holding cylinder 41, a punching cylinder 42, and a caulking cylinder 44. The pile holding cylinder 41 is for holding a pile and moving it down or up.

There are four punching cylinders 42, each of which has a rod 43 that is freely movable toward the inside of the chuck 4. The rod 43 punches out the pile with a blade portion formed at the tip.

The caulking cylinders 44 arranged in parallel below the punched cylinders 42 are made up of four cylinders, and each rod 45 has a suppressing part 46 having a concave portion formed in its front end attached to the tip of each rod 45 to prevent the rod 45 from moving forward. By doing this, the caulking material 8 inserted through the hole drilled in the pile and the hole 94 of the joint fitting 9, which will be described later, is caulked. Moreover, in this case, a recess 4b is formed in the receiving part 4a in the chuck 4 (.

In addition, the joint fitting 9 and the pile may be joined by manual caulking or bolt tightening if work conditions permit.
In this case, the caulking cylinder 44 does not need to be provided within the chuck 4.

In this way, the punching cylinder 42 and the caulking cylinder 44
The configuration position of must match the position of the hole 94 of the joint fitting 9.

As shown in FIG. 4, the joint fitting 9 is composed of an inner plate 91, an outer plate 92, and a connecting portion 93 that connects the both side plates.

The inner plate 91 is bent into a U-shape so as to be in close contact with the ventral side of the pile. The outer plate 92 has the same shape as the inner plate 91,
It is arranged in close contact with the dorsal side of the pile. The connecting portion 93 is
Both side plates 91 and 92 are connected near the center of the joint fitting 9 while keeping the gap S defined by the inner plate 91 and the outer plate 92 constant.

Two rows of four holes 94 are bored in each of the inner plate 91 and the outer plate 92. Since the number of holes is determined by the required number of caulking materials 8, the number of holes may be increased or decreased depending on usage conditions, and the arrangement may be four holes in two rows as shown in FIG. 4, or four rows. In addition, regarding the location of the holes 94, it is effective for strength to provide them at the flange of the pile as in this embodiment, and the number of caulking materials can be reduced, compared to the case of using a conventional flat reinforcing plate. It is resistant to shaking and vibration of the pile.

Although this hole 94 is provided in advance in the joint fitting 9 in this embodiment, it is also possible to make the hole 94 in the joint fitting 9 at the same time as drilling a hole in the pile with the cylinder 42 without providing it in advance. good.

Next, to explain the operation of this embodiment, first, a press-fit pile 5 is driven into the ground using the chuck 4, and the upper end of this press-fit pile 5 is connected to the existing pile P.
, P..., the press-fitting is temporarily stopped, the chuck 4 is released from the press-fit pile 5 and raised, and a separately prepared joint fitting 9 is attached to the upper end of the press-fit pile 5. Then, the new pile, that is, the joint pile 6, is held by the chuck 4 and lowered, and the lower end is fitted into the upper part of the joint fitting 9. in this case,
Since the shape of the side plates 91.92 of the joint fitting 9 is approximately equal to the surface shape of the pile 5.6, and the gap S is approximately equal to the width of the pile 5.6, the joint fitting 9 is tightly attached to the pile 5.6. and then mate.

Thereafter, the pile holding cylinder 41 of the chuck 4 is loosened to release the joint pile 6 from holding it, and only the chuck 4 is lowered to align the punched cylinder 42 of the chuck 4 with the hole 94 of the joint fitting 9 at the upper end of the press-fit pile 5. descend to the position.

Then, the punching cylinder 42 is connected to a hydraulic pump (not shown).
etc. to advance the rod 43 and drill a hole in the press-fit pile 5. After that, the chuck 4 is raised, the caulking material 8 is inserted into both holes, and the caulking cylinder 44 is inserted into the hole 94 of the joint fitting 9.
The joint fitting 9 is fixed to the press-fit pile 5 by aligning it with the hole of the press-fit pile 5 drilled by the punching cylinder 42, and by actuating the rod 45, the caulking material 8 is caulked. The joint fittings 9 and the joint resistance 6 are also fixed in the same manner. In this way, both piles 5 and 6 are added and the main work is continued.

(Effects) As explained above, according to the present invention, it is possible to easily and quickly add piles to the ends of piles that have been driven into the ground without requiring external support. This enables safe and efficient pile driving work, as it is possible to secure scaffolding for the piles, and to reduce the number of people involved in such work.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention. Figure 1 is a front view of the device, Figure 2 is a diagram explaining the action of the cylinder in the chuck, and (a) shows the punching cylinder. (b) is an enlarged sectional view showing the caulking cylinder, (C
) is an enlarged sectional view showing the relationship between both cylinders and the receiving part,
Figure 3 shows the state in which both piles are joined by caulking, where (Jl) is a plan view, (b) is a front view, ((+) is a side sectional view, and Figure 4 shows the conventional pile joining method. (a) is a side view when bolted, (b)
) is a front view of the same, (c) is a side view when welded, c
d) is a front view of the same. 1...Press-in machine 4...Chuck 5...Press-in pile 6...Join pile 8...Caulking material 9...Joint fitting 42...Punching cylinder 44...Caulking cylinder agent Patent attorney Master 1) Junior High School 2nd Division Figure 1 P p Yo-Kanshi. Figure 2 (a) (b) (C) Figure 3 Hisashi (b) (c) Figure 4 (b) <d) Figure 5 (a) (C)

Claims (3)

[Claims] (1) Fix the fitting to the top of the pile driven underground,
After fitting the connecting pile to the upper part of the joint fitting by holding it in the chuck of a press-fitting machine, a hole is bored in the pile by the punching means configured in the chuck, and then a connecting tool is inserted into the hole to make the pile. A method of adding piles by connecting them with joint fittings. (2) A pile adding device characterized in that a punching means for drilling holes in the pile is configured inside the chuck of a press-fitting machine. (3) The pile addition device according to claim 2, characterized in that a caulking means is provided within the chuck.