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Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction

A technology of reinforced concrete and construction methods, applied in the direction of pipes/pipe joints/fittings, pipe laying and maintenance, mechanical equipment, etc., which can solve problems such as broken pipes and pipe joint damage

Inactive Publication Date: 2014-12-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the polyurethane plugging method is used to solve the problem of slurry leakage caused by pipe end damage or pipe joint damage, the consequences may cause continuous damage to the pipe joint, or even "broken pipe"

Method used

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  • Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction
  • Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction
  • Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction

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Embodiment Construction

[0029] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0030] Embodiments Take a certain section of a sewage treatment project in Shanghai as an example. This section of pipe jacking is a long-distance "S"-shaped curve pipe jacking, consisting of three sections of curves with a radius of curvature R=600 and a section of straight line, with a jacking distance of 747m. pipe jacking pipe Type pipe (2m / section), the wall thickness of the jacking pipe is 190mm. The problem of excessive jacking force was encountered when jacking 613m. In order to ensure the success of the project, the method of the present invention is adop...

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Abstract

The invention relates to a construction method for preventing reinforced concrete pipe joints from being damaged and leaking slurry in a pipe-jacking construction, which comprises the following steps: 1) examining overload stress generating parts in a jacking process so as to determine whether a pipe joint is damaged or not when jacking force is overlarge in the jacking process; 2) primarily processing a damaged part of the pipe joint; 3) carrying out a leakage-preventing processing on the damaged part of the pipe joint; and 4) carrying out reinforcing processing on the damaged part of the pipe joint according to the pipe joint damage degree judged in step 2) (1). With the construction method disclosed by the invention, secondary damage caused by the large inward deformation of concrete can be restrained, and a steel pipe can replace the damaged concrete part to play the function of transmitting the jacking force when the damage is relatively serious.

Description

technical field [0001] The invention relates to a construction technology in the technical field of underground construction engineering, in particular to a construction method for preventing damage and grout leakage of reinforced concrete pipe joints. Background technique [0002] Reinforced concrete pipe jacking technology has gradually become the main construction method for small and medium-diameter pipe jacking tunnels due to its good economy and quick construction. During the jacking operation of reinforced concrete pipe jacking, under the combined action of compression and bending, the concrete may locally reach its ultimate bearing capacity and be destroyed, resulting in damage to the pipe end and the closure of the drainage pipe. Functionality and overall strength of the joint are affected. When the damage is serious enough to produce "broken pipes", the whole project will be scrapped. Of course, the impact of the damage of the pipe end is not only reflected in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L1/028
Inventor 许烨霜沈水龙李博车东日
Owner SHANGHAI JIAOTONG UNIV