JPH0728464Y2 - Tube for propulsion method - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a pipe for a propulsion method.

Conventional technology Conventionally, as an example of laying a pipeline in the ground by the propulsion method, first construct a pipeline by laying a steel pipe in the ground by the propulsion method, and then install a resin pipe such as an FW pipe from the inside. There is a pipe method in which a plurality of pipes are inserted and joined to each other, and then a filler such as cement mortar is press-fitted into a gap between a steel pipe and a resin pipe to form one pipeline.

However, according to the above conventional method, the step of propelling the steel pipe into the ground, the step of inserting and joining the resin pipe into the steel pipe by the pipe-in-pipe method, and the steel pipe and the resin pipe. Since a step of press-fitting the filler into the gap is required, there is a problem that the construction period becomes long.

Therefore, an object of the present invention is to solve the above problems and provide a pipe for a propulsion method capable of shortening the construction period for laying.

Means for Solving the Problems In order to achieve the above object, the present invention provides a propulsion method pipe capable of transmitting thrust force from a succeeding pipe body to a preceding pipe body, by inserting a resin pipe into a steel pipe and The gap between the steel pipe and the resin pipe is filled with a filler to integrate the steel pipe, the filler and the resin pipe; the ends of the integrally formed pipe body are connected to each other. A slip-on structure in which the resin pipe of the other pipe can be inserted into the steel pipe of the one pipe; the end faces of the steel pipes of the one and the other pipes are brought into contact with each other, and the resin pipe of the one and the other pipes The cushioning member is sandwiched between the end faces of the.

Effect With such a configuration, since the integrated pipe body is used in the propulsion method, the process for laying is simplified and the pipe line can be laid in a short period of time. In addition, the thrust at the time of propulsion is transmitted from the steel pipe on the subsequent side to the preceding steel pipe, and the thrust corresponding to the strength is also transmitted between the resin pipes integrated with these steel pipes by the buffer member. . Further, by providing the buffer member, it is possible to prevent a harmful gap from being generated between the adjacent resin pipes.

Embodiment FIG. 1 shows a state in which a pair of tubes for propulsion method based on the present invention are joined to each other. Here, 1 is a tubular body, a resin pipe 3 such as a FW pipe is inserted into a steel pipe 2, and a gap between the steel pipe 2 and the resin pipe 3 is filled with a filler 4 such as a resin mortar.
The steel pipe 2, the filler 4, and the resin pipe 3 are integrated. The outer steel pipe 2 projects in the axial direction by a fixed length at one end of the tubular body 1, and the inner resin pipe 3 projects in the axial direction by a fixed length at the other end side of the tubular body 1.

As shown, the protruding portion 5 of the steel pipe 2 in the one pipe body 1
The protruding portion 6 of the resin pipe 3 of the other pipe body 1 is inserted into the inside of the inside. Between the inner peripheral surface of the protruding portion 5 of the steel pipe 2 and the outer peripheral surface of the protruding portion 6 of the resin pipe 3, an annular rubber sealing material 7 is provided.
Are arranged. Further, an annular cushioning member 8 made of rubber or the like is provided between the end surfaces of the resin tubes 3 adjacent to each other.
Is provided. At the inner periphery of the steel pipe 2 at the end of the pipe body 1 on which the protruding portion 6 of the resin pipe 3 is provided, an annular joining cylinder body protruding from the end face of the steel pipe 2 by a certain length in the axial direction. 9 is fixed.

With such a configuration, when the pipe line is laid by the propulsion method, the steel pipe 2 in the preceding pipe body 1 is shown as shown in the figure.
The resin pipe 2 in the pipe body 1 to be continued into the protruding portion 5 of the
The protrusion 6 of is inserted. Then, the end faces of the adjacent steel pipes 2, 2 are brought into contact with each other, the joining cylinder 9 is inserted into the inner circumference of the end of the other steel pipe 2, and the sealing material 7 is compressed between the both protruding portions 5, 6. In addition, the cushioning member 8 is sandwiched between the end faces of the resin pipe 3.

Then, thrust T is applied to the trailing pipes 1, particularly the end faces of the steel pipes 2, to push these pipes 1 into the ground. that time,
The thrust T is transmitted from the trailing steel pipe 2 to the preceding steel pipe 2. Further, the sealing material 7 ensures the water tightness of the joint portion. The cushioning member 8 also transmits a small amount of propulsive force between the resin pipes 3, 3 according to the strength thereof. Further, by providing the cushioning member 8, it is possible to prevent a gap from being formed between the end surfaces of the adjacent resin pipes 3, 3. Furthermore, the two tubular bodies 1, 1 are centered by the joining cylinder.

Similarly, the pipes are laid in the ground by joining and propelling the subsequent pipes 1 one after another.

In this way, since the pipe line can be laid by simply propelling the integrated pipe body 1, the pipe line can be laid by the propulsion method in a short work period with simple work. Further, since the resin pipe 3 is integrated, the thrust can be applied to the resin pipe 3, and the steel pipe can be thinned accordingly.

Effects of the Invention As described above, according to the present invention, the steel pipe, the filler, and the resin pipe are integrated to form the pipe body. Therefore, by using the integrated pipe body for the propulsion method, it is easy and quick. It is possible not only to lay a pipeline in the steel pipe, shorten the construction period for that, but also to transmit the thrust at the time of propulsion from the steel pipe on the subsequent side to the steel pipe on the preceding side, and to integrate it with these steel pipes. The cushioning member can also transmit the propulsive force according to the strength between the resin pipes that have been formed, so that the steel pipe can be thinned accordingly, and the cushioning member is provided. Thus, it is possible to prevent a harmful gap from being generated between the adjacent resin pipes.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a joined state of a pipe for a propulsion method according to an embodiment of the present invention. 1 ... Tube, 2 ... Steel tube, 3 ... Resin tube, 4 ... Filler.

Claims (1)

[Scope of utility model registration request] 1. A pipe for a propulsion method capable of transmitting thrust from a succeeding pipe to a preceding pipe; a resin pipe is inserted into the steel pipe, and a filler is placed in a gap between the steel pipe and the resin pipe. To integrate the steel pipe, the filler, and the resin pipe with each other; the ends of the integrally formed pipe bodies are connected to each other inside the steel pipe of one of the pair of pipe bodies. Slip-on structure in which the resin pipe of the other pipe body can be inserted; the end faces of the steel pipes of one and the other pipe body are brought into contact with each other, and the cushioning member is sandwiched between the end faces of the resin pipes of the one and the other pipe bodies. A pipe for propulsion method characterized by