JPH0427331B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to concrete piles and steel pipe piles used in embedding methods, and more specifically, to concrete piles and steel pipe piles used in the embedding method. This relates to a pile equipped with an injection pipe for pressurizing solidified fluid.

[Conventional technology and issues]

As shown in FIGS. 7 and 8, the upper injection pipe 5 and the upper pile 19 are connected to the lower pile 20 on which the injection pipe 8 connected to the fabric cylinder 15 is arranged, and a hole is excavated to a predetermined depth. When installing the injection pipe 8 of the lower pile 20, first
Adhesive 9 is applied to the commercially available socket joint 22 that has been attached to the upper end of the pipe, the upper injection pipe 5 is suspended, the cores are aligned, and the pipe is inserted into the socket joint 22 and connected. Next, the upper injection pipe 5 is held as it is, and a new upper pile 19 is suspended, the cores are aligned with the lower pile 20, and the weld joint fittings 21 are welded and joined. Thereafter, the settling operation is started, and when the settling is completed, the solidified fluid is press-fitted into the fabric cylinder 15 through the upper injection pipe 5.

As a result, the following problems arise regarding the connection of the injection pipe.

As mentioned above, there are many work processes and a lot of human power is required.

It is difficult to work manually in corners.

The work is carried out in areas with poor footing and is therefore dangerous.

Connection work takes time.

Construction will be temporarily suspended due to connection work.

It is difficult to align the injection tubes with each other.

[Means to solve the problem]

The present invention aims to solve the problems of the prior art as described above. That is, an injection pipe to which a plug-in joint having an enlarged diameter tapered insertion opening is attached is placed in the center of the hollow of the pile, and
The above object is achieved by a pile characterized in that threaded joints are provided at the upper and lower ends of the pile, a cloth cylinder is provided on the outer periphery of the pile, and the lower end of the injection pipe is in communication with the cloth cylinder. It is.

The joint used here refers to a pipe joint that can be connected simply by inserting it, and the joint used in particular is Polyfitter (product name), which is used for water pipe joints.
It is preferable to use this insertion port with a tapered diameter expanded to 2 to 3 times the diameter of the upper injection pipe.

The injection pipe may be a vinyl chloride pipe, a polyethylene pipe, a lead pipe, etc., but it is particularly desirable to use a carbon steel pipe for piping.

Pile joints will have a screw type joint structure that can be joined by rotation, and will be provided on the outer circumference at the top and bottom ends of the pile. Further, it is preferable to use a civil engineering sheet made of synthetic fibers processed into a cylindrical shape as the cloth cylinder.

〔Example〕

Hereinafter, a case in which the present invention is applied to a ready-made concrete pile will be specifically explained based on the drawings.

First, joint 1 is shown in FIG. This joint 1 consists of the main body 2, O-ring 3, and wedge ring 4.
The upper injection pipe 5 can be connected by simply inserting it. Even if the internal pressure builds up, the wedge ring 4 prevents it from coming out. The O-ring 3 also serves to prevent fluid leakage. The insertion port 6 has a tapered diameter 2 to 3 times larger than the diameter of the upper injection pipe to facilitate alignment and insertion. An injection pipe 8 made of a steel pipe processed into an inverted T-shape is attached to the receiving port 7 on the opposite side using an adhesive 9 or a screw type.

Threaded joints are shown in Japanese Utility Model Application Publication No. 60-195328 and Japanese Patent No. 896630, but the manufacturing method of the threaded joint fittings used in the present invention is shown in Figs. 4 and 5, for example.
As shown in the figure, a commercially available vertical steel plate 17 with ridges 16 previously processed is cut to a predetermined size, and the ridges 16 are shifted by one to form a cylindrical side plate. In the case of the male screw 11, the threads 16 are placed on the outside, and in the case of the female thread 12, the threads 16 are placed on the inside so that they can be screwed together. Note that after processing, the end plate 13 is fixed at a predetermined position. As shown in FIG. 2, a skirt fitting 12 is arranged on the outer circumference at the upper end of the stake 10 and at the lower end of the male thread 11 or the female thread. The upper part of the joint to which the above-mentioned injection pipe 8 is attached is fixed to the center of the pile 10 by the upper anchor bar 14 protruding from the end plate 13 of the male screw 11.
It is best to leave it protruding 5 to 10 cm from the top of the 0 to prevent muddy water from entering the hole drilled during the installation.

The lower end of the injection pipe 8 is fixed to the pile body 10 and is arranged so as to penetrate through the cloth cylinder body 15. still,
It is preferable that the above-mentioned anchor bars are made of flat steel and that the injection pipe 8 is fixed from two directions as shown in FIG.

The cloth cylinder 15 is placed over the stake 10 as shown in FIG. 2, and both ends are tightened with bands 18.

Furthermore, Fig. 6 shows the state of connection between the upper injection pipe 5 and the ready-made pile 23 having a threaded joint, but in this case, if the upper injection pipe 5 is fixed, the wedge ring 4 of the joint 1 is unnecessary. .

The pile of the present invention has the following effects by having the above configuration.

First, when the pile is placed in a hole drilled to a predetermined depth, the pile has a threaded joint, which naturally makes it possible to center the pile. Since an injection pipe with a tapered insertion opening with an enlarged diameter is installed in the center of the hollow of such a pile, it is easy to align the injection pipe with the joint of the lower pile. This can be completed at the same time as the threaded joint of the connecting pile, and fluid can be easily pressurized into the fabric cylinder.

Therefore, in the conventional technique, as shown in FIGS. 7 and 8, the work of applying adhesive 9 to the socket joint 22, the work of inserting the upper injection pipe 26 into the socket joint 22, and the work of suspending the upper injection pipe 26 are required. However, in the present invention, as described above, the upper pile is formed into a tapered shape. All you have to do is drop it into the insertion slot and then screw it in.

Furthermore, since many manual work steps are not required, connection can be easily made even in corners, there is less danger in the work, and it is possible to improve the reliability of the connection.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view of a joint used in the present invention attached to an injection pipe, Fig. 2 is a longitudinal sectional view of an embodiment of the present invention, and Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2. Fig. 4 is a perspective view of a vertical steel plate that is a material for a screw-type joint fitting, Fig. 5 is a perspective view of a vertical steel plate processed into a fitting fitting, and Fig. 6 is a connection between an embedded pile of the present invention and a ready-made pile. FIG. 7 is an enlarged vertical cross-sectional view of a socket joint, and FIG. 8 is a vertical cross-sectional view of a connection between upper and lower piles according to the prior art. 1...Joint, 2...Body, 3...O ring, 4...Wedge ring, 5...Upper injection pipe,
6...Insertion port, 7...Intake port, 8...Injection tube,
9...Adhesive, 10...Pile, 11...Male screw,
12... Female screw, 13... End plate, 14... Upper anchor bar, 15... Cloth cylinder, 16... Mountain, 1
7... Vertical steel plate, 18... Band, 19...
Upper pile, 20...Lower pile, 21...Welded joint fitting, 2
2...Socket joint, 23...Ready-made pile.

Claims (1)

[Claims] 1. An injection pipe fitted with a plug-in joint with a tapered insertion opening with an enlarged diameter is placed in the center of the hollow of the pile, and threaded joints are installed at the top and bottom ends of the pile, and cloth fittings are installed around the outer periphery of the pile. A pile characterized in that a cylindrical body is provided, and a lower end of the injection pipe communicates with the cloth cylindrical body.