JPH0349137Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a method of driving piles such as steel sheet piles by attaching them to the upper ends of the piles that have been driven. This invention relates to a pile joint fitting that facilitates the work of joining a pile and a newly added pile (joint pile).

(Prior art) Sheet piles, etc. and steel piles are continuously driven into the ground and used for construction or civil engineering work. When driving piles into the ground that have a flat, groove-shaped or Z-shaped cross section, or when there is an obstacle above the driving point and normal length piles cannot be used, short piles may be used. However, a method is used in which the piles are driven to the desired depth.

As a conventional example of this method of adding piles,
As shown in the figure, a diamond-shaped flat reinforcing plate 20 was used. The method of adding piles using this flat reinforcing plate 20 is to first place the piles 25 and 26 and then apply the flat reinforcing plate 20 and weld it, or to add one plate to one side or both sides of the pile to be driven. After the plates 20 are welded and the piles 26 are driven, the abutting portion of the lower end of the connecting pile 25 is inserted into the gap between the flat reinforcing plates 20 and 20, and the flat reinforcing plates 2
0,20 and the joint pile 25 were welded.

Another example is to use a rectangular flat reinforcing plate 21, as shown in FIG. The contact portion is brought into contact with the upper end of the driving pile 26, and the flat reinforcing plates 21, 21
The piles were added by applying the screws to both sides of the piles 25 and 26, inserting the bolts 5 into both holes previously drilled, and tightening the bolts.

(Problem that the invention aims to solve) In joint pile work using the conventional joint fittings as described above, when tightening bolts, the worker must support the heavy flat reinforcing plate while proceeding with the work. In the case of welding, it took time and effort to weld the reinforcing plate.

After the pile was added, the top and bottom end surfaces of the pile slid into contact with each other, creating a gap that caused the pile to wobble.In addition, because the shape of the joint fittings was a flat plate, both flanges of the pile were not fixed at all, and the piles were not fixed at all when the pile was press-fitted. An inconvenience occurred in that the joined part was damaged due to forces such as twisting and press-fit resistance.

(Means for solving the problem) This invention was made in view of the above circumstances.
An inner plate and an outer plate are formed that are approximately equal to the surface shapes of the inner surface that is the ventral side of the pile and the outer surface that is the back side of the pile, and the inner plate and the outer plate are approximately equal to the thickness of the pile. It is an object of the present invention to provide a pile joint fitting that is connected at a connecting part to form a gap above and below the connecting part, and that the lower end of a joint pile and the upper end of a driven pile are respectively fitted into the gaps.

(Function) Fit the lower part of the joint metal fitting prepared separately to the upper end of the driven pile that has been press-fitted to an appropriate depth, and after inserting the joint pile into the chuck of the press-in puller, insert the joint pile into the upper part of the above joint metal fitting. Fits from above. After that, welding,
Both piles are added to connect the joint fittings and both piles by caulking or bolting. Hereinafter, embodiments of the present invention will be described based on the drawings.

(Example) In the drawings, Fig. 1 is a perspective view showing an embodiment of the pile joint fitting according to the present invention, and Fig. 2 is a plan view, a front view, and a front view showing a state in which piles are added using the same joint fitting. FIG.

In the figure, 3 is a joint fitting for channel piles, and the inner plate 3
1. It is composed of an outer plate 32 and a connecting part 33 that connects the both side plates.

The inner plate 31 is bent into a substantially U-shape so as to be in close contact with the belly side of the pile, with the center part 31a being at the center of the pile P, and the wing parts 31b, 31b being at both flanges of the pile.
The configuration is such that they are in close contact with P' and P', respectively. The outer plate 32 has the same shape as the inner plate 31 and is adapted to be in close contact with the back side of the pile.

Reference numeral 33 is a joint between the above-mentioned side plates 31 and 32, and the joint is connected while keeping the gap S defined by the inner plate 31 and the outer plate 32 at the thickness of the pile P or a width slightly wider than that. Near the center of the metal fitting 3, both side plates 31 and 32 are connected. This connecting part 3
The gaps are formed symmetrically above and below 3, respectively. In addition, the thickness and shape of the connecting portion 33 and the inner plate 31
The thickness, length, etc. of the outer plate 32 are determined depending on the conditions of the piles and the like to be used.

In this embodiment, as illustrated, four holes 34 are pre-drilled in two rows in the inner plate 31 and the outer plate 32, but the number is not limited to this. Further, depending on the case, it is not necessary to provide the hole 94 in advance, and the hole can also be formed in the joint fitting 3 at the same time as the punching described later, that is, when the pile P is bored. Further, it goes without saying that the hole 34 is not necessary when the joint fitting 3 is fixed to the pile by welding.

When using this embodiment configured in this way, as shown in FIGS. 2 to 4, first attach the lower part of the joint fitting 3 prepared separately to the upper end of the driven pile P1 that has been press-fitted to an appropriate depth. Fit together. Fittings 3
As described above, since the gap S formed by the inner plate 31 and the outer plate 32 is approximately equal to the surface shape and plate thickness of the pile P, the plate is closely attached to the surface of the pile P and is fixed in an upright state.

Next, the connecting pile P2 is inserted into the chuck 14 of the press-in and pull-out machine.
Insert the chuck 14 into the joint pile P and lower the chuck 14.
2 is fitted into the gap S at the top of the joint fitting 3 from above. In this case, like the aforementioned pile P1, the pile P2 is tightly fitted and supported in the gap S of the joint metal fitting 3, so that the pile P2 is fixed upright on the joint metal fitting 3 without the support of the chuck 14. This is also effective when pulling out the pile, and even if the joint pile is pulled out and the bolts and caulking material are removed, the pile will not fall and danger can be prevented.

Next, the chuck 14 is released from the pile P2, only the chuck 14 is lowered to the added part, and the punching means 12 in the chuck 14 is used to penetrate the pile P1 in line with the hole 34 of the joint fitting 3 and perform drilling work. I do. Furthermore, after inserting a caulking material or a bolt into the hole, caulking or bolt tightening is performed. This is also done for joint pile P2, and pile P1,
P2 is added.

In this embodiment, the drilling work for the piles P1 and P2 is performed by a punching cylinder 12 built into the chuck 14, but it can also be performed by hand by an operator if work conditions permit. Further, the caulking work can also be similarly performed by the caulking cylinder 13 built into the chuck 14.

In this way, the joint fitting of this embodiment is in close contact with the central part of the pile, both flanges, and the entire end face, so even compared to the case of using a conventional flat reinforcing plate, the joint fitting of the present example is more stable than the pile due to press-fit resistance. It is resistant to twisting and deformation, and can be configured with fewer caulking materials and bolts while maintaining strength.

Moreover, although groove-shaped piles are used here, it is of course applicable to flat plates, Z-shaped piles, etc.

Furthermore, as shown in FIG. 4, a punching machine 12 and a crimping cylinder 13 are installed in the chuck 14 of the press-fitting machine.
By using a press-in machine with a built-in function, there is no need to set up scaffolding along the pile driving direction, further improving pile driving efficiency.

(Effects) As explained above, the present invention has a remarkable effect as a joint fitting for piles, and in particular, it fits the upper end of the driven pile into the gap at the bottom of the connection part, and also fits the joint pile into the gap at the top of the connection part. This allows both piles to be connected easily and reliably, and the piles can be driven deeper. Furthermore, since the number of manpower involved in the work can be reduced, efficient pouring work is possible. In addition, when pulling out piles, even if the caulking material or bolts are removed, the fitting remains independent on the top end of the pile, which prevents the risk of accidental falling and allows safe work to proceed. It becomes possible.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the pile joint metal fitting according to the present invention, and Fig. 2 is a three-sided view of the same when caulked with caulking material. Figure 3 is a cross-sectional view when bolts are tightened, Figure 4 is a front view of a construction example when there is an obstacle above the press-in point, and Figure 5 is a diagram showing a conventional flat reinforcement plate being welded. Fig. 6 shows an example of construction in which the parts are joined together, and Fig. 6 shows an example of construction in which the same bolts are tightened. 31...Inner plate, 32...Outer plate, 33...Connection part, P...Pile.

Claims (1)

[Scope of utility model registration request] An inner plate and an outer plate are formed that are approximately equal to the surface shapes of the inner surface that is the belly side of the pile and the outer surface that is the back side of the pile, and the inner plate and the outer plate are approximately equal to the thickness of the pile. A pile joint fitting characterized in that the joint is connected at a connecting part to form a gap above and below the connecting part, and the lower end of the joint pile and the upper end of the driven pile are respectively fitted into the gaps.