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Top pipe grouting reinforcing construction method

A technology of grouting reinforcement and construction method, which is applied in the field of building construction and pipe jacking construction, and can solve the problems of loss and waste, loss of grouting materials and grouting, pipeline consolidation and adhesion, etc., to avoid loss and waste, easy to operate, The effect of speeding up the construction period

Inactive Publication Date: 2018-01-05
CHINA CONSTR EIGHT ENG DIV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned shortcomings in the prior art, an object of the present invention is to provide a construction method for pipe jacking grouting reinforcement, which has a good grouting effect and can overcome the grouting problems caused by large water flow and high soil porosity. Problems such as material loss and grout return, solve the problems of pipeline consolidation and adhesion caused by the flow of grouting materials back into the pipeline, avoid the loss and waste of grouting materials, improve construction efficiency, and effectively reduce the probability of geological mutations after grouting, suitable for Large-scale promotion and application

Method used

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  • Top pipe grouting reinforcing construction method

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Experimental program
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Effect test

Embodiment 1

[0059] At the nozzle 2 of the pipe jacking 1, a lime-sand brick brick wall is used as the closed wall 3, and the nozzle 2 is sealed through the brick wall; when the brick wall is laid, a drain hole 4 and a valve switch are reserved in the center of the brick wall; After the wall reaches a certain strength, use a pneumatic drill to drill out the grouting hole 5 (which can be arranged in a plum blossom shape) on the brick wall. The diameter of the drilled hole is 3 mm larger than the diameter of the advanced small conduit and the locking foot anchor pipe that need to be arranged in the grouting hole 5 ; After the drilling is completed, install the advanced small conduit and the lock-foot anchor pipe in time to avoid hole collapse; the jacking of the advanced small conduit and the lock-foot anchor pipe adopts the combination of large hole guidance and pneumatic drilling, that is, first drill larger than the advance small conduit Use the punching force and thrust of the drilling ri...

Embodiment 2

[0063] At the pipe opening 2 of the pipe jacking 1, a lime-sand brick brick wall is used as a closed wall 3, and the pipe opening 2 is sealed through the brick wall; after the brick wall reaches a certain strength, a drain hole 4 is drilled in the center of the brick wall with a pneumatic drill And install the valve switch in the drain hole 4; Drill out the grouting hole 5 (can be arranged in a quincunx shape) with a pneumatic drill at other positions of the brick wall, and the diameter of the drill hole is greater than the grouting sleeve valve that needs to be arranged in the grouting hole 5 The diameter of the pipe is 5mm; after the drilling is completed, install the grouting sleeve valve pipe in time to avoid collapse; the jacking of the grouting sleeve valve pipe adopts the combination of large hole guidance and pneumatic drilling, that is, first drill larger than the grouting sleeve valve pipe diameter guide hole, use the punching force and thrust of the drilling rig to p...

Embodiment 3

[0067] At the pipe opening 2 of the pipe jacking 1, a lime-sand brick brick wall is used as a closed wall 3, and the pipe opening 2 is sealed through the brick wall; after the brick wall reaches a certain strength, a drain hole 4 is drilled in the center of the brick wall with a pneumatic drill And install the valve switch in the drain hole 4; Drill out the exhaust hole 6 (can be arranged at intervals along the circumferential direction of the nozzle 2) and install the exhaust pipe in the exhaust hole 6 at other positions of the brick wall Drill out the grouting hole 5 (can be arranged in a quincunx shape) with an air drill at another position of the brick wall, and the diameter of the borehole is greater than the diameter 4mm of the grouting sleeve valve pipe that needs to be arranged in the grouting hole 5; Install the grouting sleeve valve pipe to avoid collapse holes; the jacking of the grouting sleeve valve pipe adopts the combination of large hole guidance and pneumatic d...

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Abstract

The invention provides a top pipe grouting reinforcing construction method. The method is characterized by including the following steps of firstly, arranging a sealing wall at a pipe opening of a toppipe to seal the pipe opening; secondly, forming a drain hole and a grouting hole in the sealing wall; thirdly, arranging a grouting pipe in the grouting hole; fourthly, conducting grouting of a grouting material through the grouting pipe. Preferentially, the grouting pressure is 0.5-1.0 Mpa, and the grouting time is 3-5 min. The grouting amount Q of the single grouting pipe is the product of pi,R, 2, L, eta, alpha and beta or is 1.5 times of the size of the grouting hole. The method is good in grouting effect, ingenious in design, simple in operation and suitable for large-scale applicationand popularization, the problem that the grouting material runs off and returns due to the large water flow and high soil layer porosity can be solved, the problem that pipe solidification and adhesion happen when the grouting material flows back into the pipe is solved, the run-off waste of the grouting material is avoided, construction efficiency is improved, the probability of after-grouting geological change situations is effectively reduced, the construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to the technical field of pipe jacking construction, in particular to a construction method for pipe jacking grouting reinforcement. Background technique [0002] Pipe jacking construction is an underground pipeline construction method developed after shield tunneling construction. It does not need to excavate the surface layer, and can cross roads, railways, rivers, ground buildings, underground structures and various underground pipelines. The pipe jacking construction relies on the thrust of the main jacking cylinder and the relay room between the pipelines to push the tool pipe or roadheader from the working well through the soil layer to the receiving well for hoisting. At the same time, the pipeline following the tool pipe or the boring machine is buried between the two wells in order to realize the purpose of laying the underground pipeline without excavation. ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D9/00
Inventor 郭渊萍刘化勇陶暑生李少棚黄奎彰陆仕颖
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD