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Treatment method for soft soil foundation of existing shield rectangular tunnel

A base treatment and tunneling technology, applied in soil protection, underwater structures, infrastructure engineering, etc., to achieve the effect of ensuring reinforcement, controlling long-term uneven settlement, and avoiding damage

Inactive Publication Date: 2017-05-17
CHINA RAILWAY LIUYUAN GRP CO LTD +1
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Problems solved by technology

[0005] In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a shield that has little disturbance to the ground, will not damage the existing shield rectangular tunnel structure, and can solve the problem of subsidence of the soft ground beneath the tunnel. Treatment Method for Soft Soil Base of Rectangular Tunnel with Shield

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  • Treatment method for soft soil foundation of existing shield rectangular tunnel

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Embodiment Construction

[0011] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

[0012] like figure 1 As shown, an existing shield rectangular tunnel soft soil base treatment method provided by the embodiment of the present invention involves a shield rectangular tunnel 2 with a layer of concrete cushion 5 at the bottom. It is characterized in that the specific steps are as follows:

[0013] 1) On the left and right sides of the shield rectangular tunnel 2, a grouting pipe hole 3 is drilled symmetrically from the ground 1 down to the left and right (in order to ensure that the pressure balance on the left and right sides of the shield rectangular tunnel d...

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Abstract

The invention relates to the technical field of civil construction, in particular to a treatment method for a soft soil foundation of an existing shield rectangular tunnel. The technical problem of tunnel underlying soft soil stratum settlement is solved. The method includes the steps that two grouting pipe holes are drilled downwards in the left side and the right side of the shield rectangular tunnel from the ground in a bilaterally symmetrical mode separately, and forced mud discharging is carried out from bottom to top through an MJS construction method; and meanwhile concrete slurry swing spraying reinforcement is carried out on a stratum, and a left concrete reinforcement body and a right concrete reinforcement body for supporting the lower left portion and the lower right portion of a concrete cushion of the bottom of the shield rectangular tunnel are formed. By means of the method provided by the invention, the existing shield rectangular tunnel structure cannot be destroyed, and the problem of tunnel underlying soft soil stratum settlement can be solved.

Description

technical field [0001] The invention relates to civil construction technology, in particular to a technology for treating the soft soil base of an existing shield rectangular tunnel. Background technique [0002] With the continuous development of my country's transportation industry, a large number of shield tunnels have been built and put into operation one after another. According to the operation monitoring, a considerable part of the shield tunnels have experienced uneven settlement, especially in some cities, especially in soft soil areas. The situation in Shanghai, Nanjing and other places has become increasingly serious. In order to ensure the normal use of the shield tunnel, effective measures must be taken to deal with the weak ground at the base of the shield tunnel. [0003] The current actual treatment measures include: 1) To strengthen the strength of the tunnel itself, steel rings or secondary lining inside the tunnel are generally used; 2) Rotary spraying or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D29/045
CPCE02D3/12E02D29/045
Inventor 王怀东黄波姚利国张存彭红霞乔华山刘方明姜传斌陈长江王中兵
Owner CHINA RAILWAY LIUYUAN GRP CO LTD
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