JPH09143985A - Method of vertically connecting steel pipe piles having joint members and apparatus for vertically connecting the same - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To facilitate alignment of a steel pipe pile having a joint member in a longitudinal connection. SOLUTION: A pair of guide jigs 7 each having a trumpet-shaped portion 9 provided on an upper part of a semi-cylindrical portion 8 are connected to joint members 3, 4 of a lower pile 1b.
And then tighten and fix with the mounting bands 12 and 12.
The upper pile 1a is hung from the lower pile 1b, and the joint members 3 and 4 thereof are inserted into the guide jigs 7 to form the upper pile 1a.
Join a to the lower pile 1b. As a result, both upper and lower piles 1
The a and 1b can be easily aligned correctly in the axial direction and the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cascading steel pipe piles having joint members and a cascading device used for the method.

[0002]

2. Description of the Related Art A vertical joint (body joint) by welding steel pipe piles together is carried out by hanging the upper pile with a crane and abutting the lower pile inserted in the buried hole when the site is narrow. The method of doing is adopted.

When such a vertical joint is carried out on a steel pipe pile having a joint member in the longitudinal direction of the outer periphery, such as used for a steel pipe column soil retaining wall, the axial alignment of the upper pile and the lower pile to be joined is performed. Not only this, it is necessary to align the joint members in the pipe circumferential direction so that the upper piles can be rotated by hanging a cargo handling carrier such as a chate ton or nylon sling on the lower end of the piles. I am going.

[0004]

However, in such a conventional method, it is difficult to rotate the upper pile by a unit of a minute mm due to the friction with the backing ring of the lower pile generated when the upper pile is installed. In addition, the shaking of the suspended upper pile also affects the alignment, which requires a lot of labor and time for alignment. Therefore, the improvement of the alignment work in the vertical connection has been a big problem.

The present invention was made in order to solve the above-mentioned conventional problems, and by using a guide jig,
An object of the present invention is to make it possible to easily and efficiently vertically connect steel pipe piles having joint members.

[0006]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. Forming a pair of guide jigs 7 and 7 provided with a trumpet-shaped portion 9 that widens upward on the upper part of a semi-cylindrical portion 8 that is fitted onto joint members 3 and 4 provided along the outer surface longitudinal direction. On the other hand, the lower pile 1b made of the steel pipe pile is erected upright with its head protruding to the ground, and the guide jigs 7, 7 are attached to both joint members 3, 4 of the lower pile 1b. After fastening the steel pipe 2 in a state in which the shaped portion 9 projects higher than the joint members 3 and 4, the upper pile 1a is hung on the lower pile 1b, and the joint members 3 and 4 are guided by the guides. It is also characterized in that the upper pile 1a is joined to the lower pile 1b by inserting it into the semi-cylindrical portions 8 and 8 of the jigs 7 and 7. It is.

Further, in the longitudinal connecting device of the second aspect, the upper part of the semi-cylindrical portion 8 fitted onto the joint members 3 and 4 provided on the outer surface of the steel pipe pile 1 is expanded upward. Trumpet part 9
A pair of guide jigs 7 and 7 that are long and vertically formed with
And the guide jigs 7, 7 whose lower parts are fitted to the joint members 3, 4 of the lower pile 1b, and the mounting band 12 which is fastened to the lower pile 1b.

[0008]

The lower half portions of the guide jigs 7, 7 are fitted to the joint members 3, 4 of the lower pile 1b having the head protruding from the ground, and the guide jigs 7, 7 and the steel pipe 2 are fitted together. Mounting band 12,
After winding and tightening 12 and attaching the guide jigs 7 and 7, while lowering the upper pile 1a, the joint members 3 and 4
Is inserted into the guide jigs 7, 7 to join the upper pile 1a to the lower pile 1b.

At this time, even if the joint members 3 and 4 of the upper pile 1a are slightly displaced from the positions of the semi-cylindrical portions 8 and 8 of the guide jigs 7 and 7, the trumpet-shaped portions 9 and 9 are joined to each other. 4 will be guided, and the positional deviation will be corrected automatically, and the upper and lower piles 1a and 1b will be correctly positioned and joined in the axial direction and the circumferential direction.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an example of the embodiment, and FIG.
Is an explanatory perspective view of the process of using the guide jig in the present invention,
FIG. 4 is a front view showing a welded state of the upper pile and the lower pile.

In the present invention, a steel pipe pile 1 is used in which a pair of joint members 3 and 4 are provided in the longitudinal direction of the outer surface of the steel pipe 2.
Generally, as shown in FIG. 2, one joint member 3 is O
The male member having a shaped cross section and the other joint member 4 are female members having a C shaped cross section, but the present invention is not limited to this type, and various types of joint members 3 and 4 can be applied. It

Further, in the steel pipe pile 1, as shown in FIGS. 1 and 4, the joint members 3 and 4 are provided with a length slightly inward from the end surface of the steel pipe 2 for convenience of welding in the vertical joint. ing. A groove 5 for welding is formed at the lower end of the steel pipe 2, and a backing ring 6 is provided in the upper end so as to project upward.

In the method of the present invention, a pair of guide jigs 7, 7 for aligning the upper pile 1a and the lower pile 1b are used. This guide jig 7 has a long semi-cylindrical portion 8 that can be fitted onto the joint members 3 and 4 of the steel pipe pile (upper pile 1a, lower pile 1b).
Is formed by providing a trumpet-shaped portion 9 which is spread upwardly on the upper part of the. On the outer surface of the lower half of the semi-cylindrical portion 8, a plurality of projecting pieces 10, 10, 11, 11 are provided, which serve to prevent the mounting band 12 from slipping.

The lower pile 1b is inserted into an excavation hole (not shown) for building a pile, and is temporarily fixed in a state in which the head portion of the lower pile 1b projects above the ground for a required length. The pair of guide jigs 7, 7 are
The lower half of the semi-cylindrical portion 8 is externally fitted to the outside of the joint members 3 and 4 of the lower pile 1b protruding above the ground so that the trumpet-shaped portion 9 protrudes sufficiently higher than the lower pile 1b. . The pair of guide jigs 7, 7 are attached to the mounting band 12, between the projecting pieces 10, 10 and 11, 11 over the outer peripheral surface of the steel pipe 2.
Wind 12 and tighten with fasteners 13.

After mounting the guide jigs 7, 7 as described above, the upper pile 1a lifted by a crane or the like is replaced with the lower pile 1.
It is carried directly above b and aligned with the lower pile 1b almost in the axial direction, and the joint members 3 and 4 of the upper pile 1a substantially face the guide jigs 7 and 7 which are erected on the lower pile 1b. In this way, the joint members 3 and 4 are lowered while being aligned in the circumferential direction, and the joint members 3 and 4 move to the trumpet-shaped portions 9 of the guide jigs 7 and 7.
To be inserted into.

In this case, if any part of the periphery of the joint members 3 and 4 of the upper pile 1a is brought into contact with the inner surface of the trumpet-shaped portion 9 of the guide jig 7, as the descent progresses, the guide jig 7 On the other hand, the positions of the joint members 3 and 4 fitted with this are corrected, and the joint members 3 and 4 are fixed to the guide jig 7
Introduced into the semi-cylindrical portion 8 of the above, the correct alignment with the joint portions 3 and 4 of the lower pile 1b can be performed. And upper pile 1
The end faces of the steel pipes 2 and 2 of a and the lower pile 1b are joined.

After the upper and lower piles 1a and 1b are joined, the mounting bands 12 and 12 are removed and the guide jigs 7 and 7 are removed, so that the steel pipes 2 and 2 of the piles 1a and 1b are removed as shown in FIG. If welding 14 is performed along the outer periphery of the joint ends, and then short connecting members 15, 16 of the same shape as those are attached between the joint members 3, 3, 4, 4 of both piles 1a, 1b by welding 17, 17, The vertical connection of the upper pile 1a and the lower pile 1b is completed.

[0018]

As described above, according to the present invention,
Attach the guide jig to the joint member of the lower pile, lower the upper pile lifted on the lower pile, insert the joint member into the guide jig, and join the upper pile to the lower pile. As a result, not only the axial alignment of the upper pile with respect to the lower pile but also the circumferential alignment can be performed accurately and easily, and the vertical jointing of steel pipe piles with joint members can be performed easily. You can do it efficiently.

The guide jig used for this purpose has a simple structure, can be manufactured at low cost, is easy to handle, and can be used again.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an example of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an explanatory perspective view of a mounting process of a guide jig.

FIG. 4 is a front view showing a welded state of the upper and lower piles.

[Explanation of symbols]

 1 Steel pipe pile 1a Upper pile 1b Lower pile 2 Steel pipe 3,4 Joint member 7 Guide jig 8 Semi-cylindrical portion 9 Trumpet-shaped portion 10, 11 Projecting piece 12 Mounting band 13 Fastener

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoji Hirose 3-1-3 Nihonbashi Muromachi, Chuo-ku, Tokyo Stock company Kubota Tokyo headquarters (72) Inventor Yoichi Yokoyama 3-1-3 Nihonbashi-Muromachi, Chuo-ku, Tokyo Kubota Tokyo Head Office

Claims (2)

[Claims] 1. A pair of guide jigs, each having a trumpet-shaped portion that expands upwardly, is formed on an upper portion of a semi-cylindrical portion that is externally fitted to a joint member provided along a longitudinal direction of an outer surface of a steel pipe pile. On the other hand, on the other hand, the lower pile by the steel pipe pile is erected upright with its head protruding to the ground, and the guide jigs on both joint members of the lower pile, the trumpet-shaped portion of which is above the joint member. After fastening it to the steel pipe in a highly protruding state, hang the upper pile on the lower pile and insert the joint member into the semi-cylindrical portion of the guide jig to lower the upper pile. A method for vertically connecting steel pipe piles having a joint member, characterized in that the steel pipe piles are joined to each other. 2. A pair of vertically long guides, in which a trumpet-shaped portion that expands upward is provided on the upper part of a semi-cylindrical portion that is fitted onto a joint member provided on the outer surface of a steel pipe pile. A jig and a guide jig with the lower part fitted to the joint member of the lower pile,
An apparatus for vertically connecting steel pipe piles having a joint member, comprising a mounting band that is fastened to the lower pile.