JP3158573U - Pile connection bracket - Google Patents

Abstract

Provided is a pile connecting bracket which has a high degree of freedom and can easily and reliably connect between piles. A ring having a C-shaped cross-section in which a side wall is provided with a strip-shaped cut, and is welded to the inner surface of an upper end portion of a pipe-like first pile driven into the ground. It has a half part 24 and an upper half part 22 welded to the inner surface of the second pile 18 to which the lower end part 20 is connected to the upper end part 16 of the first pile 14. The inner wall of the pile 14 has a C-shaped side wall 26 having a uniform outer diameter that adheres its outer surface by elasticity, and the upper half 22 has an outer diameter of the side wall 26 at least near the uppermost end 30 at the uppermost end 30. It has a taper portion 32 that can be gradually reduced. Since the lower half 24 closely contacts the outer surface of the inner wall of the first pile 14 by elasticity, the initial positioning and welding work are easy. Since the taper portion 32 is provided in the vicinity of the uppermost end 30, the second pile 18 can be easily connected, positioned and welded. [Selection] Figure 1

Description

The present invention relates to a pile connection fitting used to connect a pipe-like pile used for a foundation of a building.

When building a building in a weak ground, there is a construction method that uses a pipe-like pile as the foundation. The tip of the pile is driven into a hard rock. When the bedrock is in a deep place, it is driven while connecting several piles. Various connection structures of the pile at this time have been developed (Patent Document 1) (Patent Document 2) (Patent Document 3).

JP 2005-282184 A JP 2005-282187 A JP 2008-231733 A

The known prior art has the following problems to be solved. All the conventional pile connection structures are complex. Therefore, the parts are expensive. Moreover, there are many things which require time for construction and assembly. In addition, it is necessary to adjust the size at the site and to center the piles to be butt-connected. In addition, when welding is performed, if the adhesion is poor, good construction may be difficult and the strength may be insufficient. The present invention has been made paying attention to the above points, and an object thereof is to provide a pile connecting metal fitting having a high degree of freedom and capable of simply and reliably connecting piles.

The following configurations are means for solving the above-described problems. <Configuration 1> A lower half part welded to the inner surface of the upper end of a pipe-shaped first pile driven into the ground, which is a ring having a C-shaped cross section provided with one strip-like cut on the side wall, An upper half welded to the inner surface of the second pile connected to the lower end of the upper end of the first pile, and the lower half is elastically applied to the inner wall of the first pile. A C-shaped side wall having a uniform outer diameter that closely contacts the upper end portion, and a tapered portion that gradually reduces the outer diameter of the side wall toward the uppermost end at least in the vicinity of the uppermost end. And pile connection fittings.

<Configuration 2> In the pile connection fitting according to Configuration 1, in the state where no external force is applied, the outer diameter of the lower half is larger than the inner diameter of the first pile, and an external force is applied to shorten the band-shaped cut. The pile connecting bracket, wherein the outer diameter of the lower half is smaller than the inner diameter of the first pile.

<Effect of Configuration 1> Since the lower half of the first half closely contacts the inner wall of the first pile with elasticity, the first positioning and welding work are easy. Since it has a taper part near the uppermost end, the second pile can be easily connected, positioned and welded. <Effect of Configuration 2> In the state where no external force is applied, if the outer diameter of the lower half is larger than the inner diameter of the first pile, the pile connection fitting can be easily positioned on the first pile and does not fall.

It is the pile connection metal fitting 10 of Example 1, (a) is an external appearance perspective view, (b) is a longitudinal cross-sectional view, (c) is a longitudinal cross-sectional view of the state after a pile connection. It is a perspective view which shows the process just before mounting the pile connection metal fitting 10 to a lower pile. It is a perspective view which shows the process of temporarily fixing the pile connection metal fitting 10 to a lower pile. It is a perspective view which shows the process just before welding the pile connection metal fitting 10 to an upper and lower pile.

Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1 is a pile connection fitting 10 of Example 1, (a) is an external perspective view, (b) is a vertical cross-sectional view, and (c) is a vertical cross-sectional view in a state after pile connection. As shown to (a) of a figure, the pile connection metal fitting 10 is a cross-section C-shaped ring which provided the strip | belt-shaped cut | interruption 28 in the side wall 26. FIG. This pile connection fitting 10 is manufactured by pressing a steel plate or by pressing a steel pipe after cutting. The material may be steel or the like that can be welded to a pipe-like pile used for the foundation.

As shown in (b) of the figure, this pile connection fitting 10 includes a side wall 26 having a uniform outer diameter A having an appropriate length. Further, at least in the vicinity of the uppermost end 30, there is a tapered portion 32 that can gradually reduce the outer diameter of the side wall 26 toward the uppermost end 30. On the other hand, all of the pipe-like piles driven into the ground have an inner diameter B. It is designed so that the outer diameter A of the pile connection fitting 10 is slightly larger than the inner diameter B of the pipe-like pile.

As shown to (c) of a figure, the pile connection metal fitting 10 is used in order to connect two piles. One of the two piles, that is, the pipe-shaped first pile 14 is already driven into the ground, and the upper end portion 16 thereof is exposed to the ground. Here, the pile connection fitting 10 is mounted and welded, and then the lower end portion 20 of the second pile 18 is mounted and the connection portion is welded. After the welding connection, the welded portion 36 is visible from the outside.

The pile connecting bracket 10 has an upper half 22 and a lower half 24. The lower half 24 is fitted into the upper end 16 of the first pile 14 and welded to the upper end 16 and the inner surface of the first pile 14. The upper half portion 22 is provided with the tapered portion 32 described above, and can be easily inserted into the second pile 18. The upper half 22 is welded to the lower end 20 and the inner surface of the second pile 18.

Here, in the state of FIG. 1A in which the external force is not applied to the pile connection fitting 10, the outer diameter A of the lower half portion 24 shown in FIG. 1B is larger than the inner diameter B of the first pile 14 shown in FIG. Is also big. Therefore, even if the pile connection fitting 10 is placed near the upper end portion 16 of the first pile 14, the pile connection fitting 10 does not fall into the first pile 14. Then, when an external force is applied to the pile connection fitting 10 to shorten the band-shaped cut 28, the outer diameter A of the lower half 24 is smaller than the inner diameter B of the first pile 14. Thereby, the lower half part 24 of the pile connection fitting 10 fits into the upper end part 16 of the first pile 14.

Furthermore, as shown in FIG. 1C, the lower half portion 24 of the pile connection fitting 10 is brought into close contact with the inner wall of the first pile 14 by elasticity. Therefore, unless a strong external force is applied after the position is determined, the pile connection fitting 10 does not move as it is in a fixed state as shown in FIG. In this state, the welding connection work of the pile connection fitting 10 and the first pile 14 can be easily performed.

Also, if the pile connection fitting 10 is made to have a uniform outer diameter as a whole, after the pile connection fitting 10 is welded to the first pile 14, the entire outer diameter becomes B, and the pile connection fitting 10 is It becomes difficult to insert into the lower end 20 of the second pile 18. Therefore, in the present invention, a taper portion 32 is provided in the upper half portion 22 of the pile connection fitting 10 to facilitate insertion of the second pile 18 into the lower end portion 20.

2-4 is a perspective view which shows each process of the connection construction of the pile which uses the pile connection metal fitting 10. FIG. FIG. 2 is a perspective view showing a process immediately before the pile connection fitting 10 is mounted on the lower pile. First, the first pile 14 is driven into the ground. And the upper end part 16 of the 1st pile 14 is located in the height which is easy to work on the ground. Next, the pile connection fitting 10 is prepared. And if pressure is applied to the outer periphery of the lower half part 24 of the pile connection metal fitting 10 and the cut | interruption 28 is shrunk, the pile connection metal fitting 10 will be inserted in the inside of the upper end part 16 of the 1st pile 14. Thereafter, the pressure applied to the pile connection fitting 10 is released. Thereby, the pile connection metal fitting 10 is positioned, and it transfers to the state of FIG.

FIG. 3 is a perspective view showing a process of temporarily fixing the pile connection fitting 10 to the lower pile. In FIG. 3, the pile connection fitting 10 is fitted into the upper end portion 16 of the first pile 14. Here, the upper end 16 of the first pile 14 and the lower half 24 of the pile connector 10 are welded. The welding at this time may be temporarily fixed so that the pile connection fitting 10 does not move by an external force received when the second pile 18 is connected. Since the lower half 24 of the pile connection fitting 10 is brought into close contact with the inner wall of the first pile 14 by elasticity, initial positioning and welding work are easy. Subsequently, the lower end portion 20 of the second pile 18 is brought close to the pile connection fitting 10. By the action of the taper portion 32, the pile connection fitting 10 can be easily inserted into the lower end portion 20 of the second pile 18.

FIG. 4 is a perspective view showing a process immediately before welding the pile connection fitting 10 to the upper and lower piles. As shown in the partial enlarged view in the circle of the alternate long and short dash line, a part of the upper half portion 22 and the lower half portion 24 of the pile connection fitting 10 are both the upper end portion 16 of the first pile 14 and the second pile. 18 is exposed in the gap between the lower end portions 20 of the 18. In this state, the first pile 14 and the second pile 18 are held. The second pile 18 is suspended by a not-shown coolane or the like, and can be temporarily held in this state.

Thereafter, a welding burner (not shown) is applied to the gap between the lower end portion 20 of the second pile 18 and the upper end portion 16 of the first pile 14 to perform a welding operation. Thereby, the pile connection part of a cross section as shown in FIG.1 (c) is formed.

In addition, the shape of the pile connection metal fitting 10 illustrated in said drawing is not limited to this. Various types of the upper half 22 and the lower half 24 having different lengths or different outer diameters may be prepared. Thus, the pile connection fitting 10 can be used to connect piles of various sizes. Since the structure is simple and low cost can be realized, extra preparations can be made and the optimum one can be selected on site. Furthermore, since the structure is simple, there is an effect that the work for cleaning the welding surface in advance is also simplified.

DESCRIPTION OF SYMBOLS 10 Pile connection bracket 14 1st pile 16 Upper end part 18 Second pile 20 Lower end part 22 Upper half part 24 Lower half part 26 Side wall 28 Cut 30 Top end 32 Taper part 34 Welding part

Claims (2)

A lower half part welded to the inner surface of the upper end of a pipe-like first pile driven into the ground, and having a C-shaped cross-section with a single band-like cut on the side wall; An upper half portion welded to the inner surface of the second pile, the lower end portion of which is connected to the upper end portion of the pile, and the lower half portion is uniformly contacted with the inner wall of the first pile by elasticity Pile connection characterized by having a C-shaped side wall with an outer diameter and a taper part which gradually reduces the outer diameter of the side wall toward the uppermost end at least in the vicinity of the uppermost end in the upper half part Hardware. In the pile connection metal fitting according to claim 1, when the external force is not applied, the outer diameter of the lower half is larger than the inner diameter of the first pile, and when the external force is applied to shorten the band-shaped cut. The pile connecting bracket, wherein an outer diameter of the lower half is smaller than an inner diameter of the first pile.

Images