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Treatment method of the bedding soft soil of existing circular shield tunnel

A technology for base treatment and tunneling, which is used in tunnels, tunnel linings, and earth-moving drilling and mining, etc., to ensure safety, less stratum disturbance, and solve the problem of reinforcement of weak strata.

Inactive Publication Date: 2017-05-24
CHINA RAILWAY LIUYUAN GRP CO LTD +1
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Problems solved by technology

[0005] Aiming at the defects 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 structure of the existing shield circular tunnel, and can solve the problem of subsidence of the soft ground beneath the tunnel. Soft Soil Base Treatment Method for Circular Tunnel with Shield

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  • Treatment method of the bedding soft soil of existing circular shield tunnel

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Embodiment Construction

[0012] 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.

[0013] Such as figure 1 As shown, an existing shield round tunnel soft soil base treatment method provided by the embodiment of the present invention is characterized in that the specific steps are as follows:

[0014] 1) On the left and right sides of the shield circular tunnel 2, drill a grouting pipe hole 3 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 circular tunnel does not produce additional horizontal displacement, grouting The pipe holes must be arranged symmetricall...

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Abstract

The invention relates to a treatment method of the bedding soft soil of existing circular shield tunnel aiming to solve the technology issue on the stratum subsiding of the auger ground, which relates to the civil construction technology field. The method comprise: drilling downward two eudipleural grouting pipes in the left and right sides of the circular shield tunnel; compelling the spoil disposal with the adaptation of MJS construction method from the bottom to the top; reinforcing the concrete and slurry with the swing grouting method; and forming concrete reinforced bodies in the left and right of the bottom-left of the circular shield tunnel and the bottom-right of the circular shield tunnel. The method won't ruin the existing circular shield tunnel and can solve the stratum subsiding of the auger ground.

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 circular 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 com...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D9/06
CPCE21D11/10E21D9/06
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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