JPH09100531A - Vertical jointing method for steel pipe pile having coupling member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the positioning easier in the vertical jointing of steel pipe piles having coupling members. SOLUTION: At the upper end of an attaching rod 8 which can insert, a lower portoin into jointing members 3 and 4 of steel pipe piles, guide jigs 7, 7 are formed, which can be separably coupled to a linking rod 10 having a peak portion 11 which is also able to insert the upper portion in the same manner. This is inserted to the coupling members 3 and 4 of the lower pile 1b and is kept, standing vertically. With respect to the lower pile 1b, the upper pile 1b is lowered and its coupling members 3 and 4 are fitted to a linking rod 10 and the upper pile 1a is coupled to a lower pipe 1b. By doing this, the upper and lower piles 1a and 1b can be easily and properly positioned in the axial direction and peripheral 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.

[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 as to align the positions of the joint members. Conventionally, a cargo handling carrier such as a chain tongue or nylon sling is hung on the lower end of the upper pile to It's rotating.

[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 has been 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. The present invention is provided along the longitudinal direction of the outer surface of a steel pipe pile. The fitting rod 8 that allows the lower part to be inserted and locked to the pipe-shaped joint members 3 and 4 for a desired length,
A guide jig 7 is formed so as to be separably connected to an engaging rod 10 having a pointed portion 11 whose upper portion can be inserted for a required length, and this is inserted into the joint members 3 and 4 of the lower pile 1b. After standing upright, the upper pile 1a is hung on the lower pile 1b, and the joint members 3 and 4 are fitted into the engaging rods 10 of the guide jig 7 to put the upper pile 1a on the lower pile 1b. It is characterized by being bonded to.

[0007]

The guide jigs 7, 7 are inserted into the joint members 3, 4 of the lower pile 1b fixed with the head projecting above the ground and inserted into the embedding hole, and then erected. On the other hand, the upper pile 1a lifted by the crane is lowered while the joint members 3 and 4 of the upper pile 1a are substantially aligned with the joint members 3 and 4 of the lower pile 1b, and the joint members 3 and 4 are guided by a guide jig. Then, the upper piles 1a are joined to the lower piles 1b by fitting them together.

At this time, even if the joint members 3 and 4 of the upper pile 1a are slightly displaced from the guide jigs 7 and 7, the pointed portions 11 and 11 of the guide jigs 7 and 7 guide the joint members 3 and 4. Then, the positional deviation will be automatically corrected, and the upper and lower piles 1a, 1
The b is joined by being properly positioned in the axial direction and the circumferential direction.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the joined state of the upper pile and the lower pile, FIG. 3 shows the joining process, and FIG. 4 shows the guide jig used in the present invention.

In the present invention, a steel pipe pile 1 is used in which a pair of pipe-shaped joint members 3 and 4 are provided in the longitudinal direction of the outer surface of the steel pipe 2. One joint member 3 is a male member having an O-shaped cross section, and the other joint member 4 is a female member having a C-shaped cross section. In addition,
Both of the joint members 3 and 4 may have a C-shaped cross-section and may be of a type in which they are hung on each other.

In the steel pipe pile 1 having the pipe-like joint members 3 and 4 as described above, the joint members 3 and 4 are end faces of the steel pipe 2 as shown in FIGS. It is provided with a length to a slightly inward position. Also,
A groove 5 for welding is formed at the lower end of the steel pipe 2, while a backing ring 6 is provided in the upper end so as to project upward.

In the method of the present invention, the guide jig 7 for aligning the upper pile 1a and the lower pile 1b is used. As shown in the figure, the guide jig 7 has a lower portion with joint members 3, 4
A pointed head which is formed so that it can be inserted into and removed from the inside, and an upper part is formed into an inside of the joint members 3 and 4 so that the upper part can be inserted into and removed from the upper end of a mounting rod 8 provided with a locking pin 9 that regulates the insertion length. It has a structure in which an engaging rod 10 having 11 is separably coupled by screwing a screw portion 12 or the like. In addition, instead of the pin 9 of the mounting rod 8,
The diameter of the portion not inserted into the joint members 3 and 4 may be larger than that of the inserted portion.

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 upper portion of the lower pile 1b projects above the ground for a required length. Then, the mounting rod 8 and the engaging rod 10
The guide jig 7 in which the
The lower part of the mounting rod 8 is inserted up to the position of the locking pin 9 in the upper part of the above to stand upright.

The upper pile 1a, which is vertically connected to the lower pile 1b, is lifted up by a crane and carried right above the lower pile 1b to be aligned with the lower pile 1b almost in the axial direction. The joint members 3 and 4 are lowered toward the guide jigs 7 and 7 which are erected on the lower pile 1b while being aligned in the circumferential direction. The fitting rods 7 and 7 are fitted to the engaging rod 10.

In this case, if any part of the periphery of the joint members 3 and 4 of the upper pile 1a hits the pointed portion 10 of the guide jig 7, as the descent proceeds, Then, the positions of the joint members 3 and 4 fitted with this will be corrected, and the joint members 3 and 4 and the guide jigs 7 and 7 will be corrected.
The engaging rod (10) is fitted. Thereby,
The axes of the joint members 3, 3, 4, 4 of the upper pile 1a and the lower pile 1b are aligned with each other, and the end faces of the steel pipes 2, 2 of the upper pile 1a and the lower pile 1b are joined.

After the upper and lower piles 1a and 1b are joined as described above, the guide jigs 7 and 7 are removed. To this end, the guide jig 7 is pushed up and its mounting rod 8 is attached to the joint members 3, 4
In such a state that it is further pulled out, the engaging rod 10 and the mounting rod 8 are relatively rotated, and the screw 12 is unscrewed and separated, the mounting rod 8 is removed, and then the engaging rod 10 is pulled out. To do.

After removing the guide jigs 7, 7, as shown in FIG.
As shown in Fig. 2, welding 13 is performed along the outer circumference of the joint ends of the steel pipes 2 and 2 of both piles 1a and 1b, and then the same shape is formed between the joint members 3, 3, 4 and 4 of both piles 1a and 1b. If the short connecting materials 14 and 15 are attached by welding 16 and 16, the vertical connection construction of the upper pile 1a and the lower pile 1b will be completed.

[0018]

As described above, according to the present invention,
Since the lower part of the guide jig was inserted into the joint member of the lower pile and stood upright, the suspended upper pile was lowered and the joint member was fitted with the upper part of the guide jig. If the joint member is roughly aligned with the joint member of the lower pile, the fitting between the guide jig and the joint member not only allows the upper and lower piles to be aligned on the axial line, but also can be displaced in the circumferential direction. Since the correction is automatically performed and the two piles can be joined accurately, the vertical jointing of the steel pipe pile having the joint member can be performed easily and 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 detached and used again after construction, thus reducing the cost.

[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 sectional view of the same.

FIG. 3 is a partially cutaway front view of a main part showing a lowering process of the upper pile.

FIG. 4 is a partially cutaway front view showing a guide jig.

FIG. 5 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 Mounting rod 9 Locking pin 10 Engaging rod 11 Pointed portion 12 Threaded portion

Claims (1)

[Claims] A mounting rod that allows the lower part to be inserted and locked to the pipe joint member that is provided along the longitudinal direction of the outer surface of the steel pipe pile, as well as a sharpened tip that allows the upper part to be inserted to the required length. After forming a guide jig in which the engaging rod having the head portion is separably coupled, it is inserted into the joint member of the lower pile and erected, and then the upper pile is hung on the lower pile, A vertical connection method for steel pipe piles having a joint member, characterized in that the joint member is fitted into the engaging rod of the guide jig, and the upper pile is joined to the lower pile.