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Non-replacement construction method of reinforcing pipe jacking friction reduction slurry

A technology of anti-friction mud and construction method, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc. It can solve problems such as unsatisfactory filling and reinforcement effects of cement slurry materials, unsuitable for large-section pipe jacking construction, and unfavorable control of ground subsidence, etc. , to achieve the effect of maintaining pressure, reducing pressure loss, and good reinforcement

Active Publication Date: 2015-01-07
SHANGHAI TUNNEL ENG CO LTD +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a non-replacement construction method for reinforcing pipe jacking anti-friction mud, and solve the problem that the existing replacement construction method disturbs the tunnel soil layer and is not conducive to controlling ground subsidence. The problem of unsatisfactory filling and reinforcement effect of slurry material, and the problem that it is not suitable for large-section pipe jacking construction

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] refer to figure 2 , shows the flow chart of the non-replacement construction method of the invention for strengthening the anti-friction mud for pipe jacking. The non-replacement construction method of reinforcing the anti-friction mud for pipe jacking of the present invention adopts a kind of solidified mud material, and does not need to replace the anti-friction mud during the construction process, and directly injects the solidified mud into the anti-friction mud, and is combined with the anti-friction mud After mixing, the strength is the same as that of the surrounding soil or higher than the strength of the soil, so as to reduce the disturbance of the ground during construction, and to a greater extent reduce ground settlement and tunnel leakage and waterproofing. The solidified slurry is mixed with cement, lime, and water in a c...

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Abstract

The invention relates to a non-replacement construction method of reinforcing pipe jacking friction reduction slurry. The method comprises the following steps that: after the tunnel breakthrough, curing slurry is injected from a position of a slurry injecting hole in a pipe joint, so that the curing slurry is mixed with the friction reduction slurry injected outside the pipe joint; and curable mixed slurry is formed, wherein the curing slurry comprises cement, lime and water. The method of injecting the curing slurry to be mixed with the friction reduction slurry is adopted; the slurry replacement process in the conventional replacement construction method is omitted; and the mixture obtained after the curing slurry and the friction reduction slurry are mixed can be cured, and the intensity of the cured mixed slurry is higher than the intensity of soil bodies around a tunnel, so that a good reinforcing effect is achieved. Through adopting the curing slurry injection method, the disturbance on a soil layer in the tunnel can be reduced; the surface settlement can be effectively controlled; and the waterproof performance of the tunnel is improved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a non-replacement construction method for reinforcing pipe jacking and reducing friction mud. Background technique [0002] Pipe jacking tunnel construction technology has been more and more widely used in recent years. In the process of pipe jacking, in order to reduce the propulsion resistance, antifriction mud will be injected between the outer side of the pipe joint and the stratum. Since the antifriction mud is in a liquid state, it will Part of it penetrates into the formation, reducing the volume of the anti-friction mud, so that after the tunnel is penetrated, the ground will subside. In order to solve the problem of land subsidence in the prior art, a construction method of replacing anti-friction mud is proposed. The main method is: after the tunnel structure is penetrated, the anti-friction mud on the periphery of the pipe joint is replaced with cement slurry to fill ...

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Application Information

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IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/105E21D11/38
Inventor 黄德中黄俊李刚张荣辉田瑞端陈旭光刘喜东朱雁飞方涛蔡雯俊蒋威王浩顾眩曜石宇
Owner SHANGHAI TUNNEL ENG CO LTD
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