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Jacking pipe cushioning material, and jacking pipe

A buffer material and pipe technology, applied in the direction of pipes/pipe joints/fittings, pipe protection, pipe laying and maintenance, etc., can solve the problem of reduced buffer performance, and achieve the effect of improved buffer effect, high stress dispersion effect, and easy positioning.

Active Publication Date: 2012-11-07
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the cushioning performance is reduced compared to a cushioning material that is in contact with the entire end surface of the jacking pipe and exhibits high stress dispersion.

Method used

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  • Jacking pipe cushioning material, and jacking pipe
  • Jacking pipe cushioning material, and jacking pipe
  • Jacking pipe cushioning material, and jacking pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0030] exist figure 1 Among them, 10 is, for example, a cylindrical jacking pipe made of concrete, and L is a central axis. A cylindrical ferrule 11 made of steel plate or the like is mounted on the rear end portion (the receiving port side) of the push pipe 10A on the front side, and the slightly reduced diameter front end portion (the insertion port side) of the push pipe 10B on the push rear side is installed. side) into the above ferrule 11. On the rear end surface 12 of the front jacking pipe 10A, an annular cushioning material 20 for jacking is pasted with an adhesive or the like so that the central axis becomes the above-mentioned central axis L. When pushing, the rear jacking pipe 10B As described above, the front end portion enters the ferrule 11 , and the front end surface 13 is in contact with the cushioning material 20 for pipe jacking. In addition, the ...

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Abstract

Provided is a jacking pipe cushioning material that exhibits a superior stress-dispersion effect and is easy to position. The jacking pipe cushioning material (20) (cushioning material pieces (20a)) is a ring-shaped plate member comprising a first side surface (21) and a second side surface (22), which are disposed so as to be substantially parallel at a prescribed distance (s) from one another, as well as an outer peripheral surface (25) positioned at the outer peripheral edges of both side surfaces. If the diameter (radius of curvature) from the center (L) of the ring to the outer circumferential edge (23) of the first side surface (21) is represented by A, the diameter (radius of curvature) to the outer circumferential edge (24) of the second side surface (22) is represented by B, and the diameter (radius of curvature) to an arbitrary position along the axial direction of the outer circumferential surface (25) is represented by C, then A >= B and A > C.

Description

technical field [0001] The present invention relates to a pipe jacking buffer material used for joints of pipe jacking (pipe jacking) in a pipe jacking method and a pipe jacking material having the buffer material. Background technique [0002] The pipe-jacking method is widely used as a construction method for laying pipes underground, such as public sewerage works. The pipe jacking method is a construction method in which pipes are buried underground by, for example, sequentially pushing out concrete pipes underground without excavating the entire range of buried pipes. Hereinafter, in this specification, the above-mentioned buried pipe is referred to as a "jack pipe". [0003] Among the pipe jacking methods used in the pipe jacking method described above, concrete, resin concrete, pottery, and iron pipe jacking pipes are often used as materials. Therefore, when the ejector pipes are pushed out, if the ejector pipes come into contact with each other, the contacted parts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06F16L1/024F16L57/00
CPCF16L21/02E21D9/005E21D9/06F16L1/024F16L57/00
Inventor 山田浩久
Owner SEKISUI PLASTICS CO LTD
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