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Shield tunnel reinforcement method

A technology of shield tunneling and grouting, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems that the shield tunnel reinforcement effect is not good enough, affects the smooth operation of the subway, and affects the integrity of the tunnel, etc., and achieves a good reinforcement effect , avoid the uplift of the tunnel strata, and improve the effect of operation guidance

Inactive Publication Date: 2018-05-08
GUANGZHOU METRO DESIGN & RES INST
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Problems solved by technology

However, this reinforcement method requires a large amount of cement slurry, and the construction period is long, while the mixing pile can only reinforce the ground as a whole, and the reinforcement effect for the shield tunnel is not good enough. In addition, too many mixing piles will cause the ground to bulge , affecting the integrity of the tunnel, leading to uneven subway tracks in the tunnel, thus affecting the smooth operation of the subway

Method used

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  • Shield tunnel reinforcement method

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and embodiment the technical solution of the present invention is further described:

[0040] Such as figure 1 As shown, the shield tunnel reinforcement method in the present embodiment comprises the following steps:

[0041] 1) Stirring piles 2 are formed on the outside of shield tunnel 1, and the number of stirring piles 2 will decrease accordingly due to compaction and grouting thereafter;

[0042] 2) A grouting hole is set between the stirring pile 2 and the shield tunnel 1, a sleeve valve pipe 3 is installed in the grouting hole, and a one-way valve 4 is installed on the upper end of the sleeve valve pipe 3, and the one-way valve 4 makes During the grouting process, the grout will not flow back, so that the grout can enter the soil smoothly. It should be pointed out that in this embodiment, the one-way valve 4 is connected to the sleeve valve pipe 3 through a flange. The structure of the flange is simple and can make ...

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Abstract

The invention provides a shield tunnel reinforcement method. The method comprises the following steps that stirring piles are formed at the outer side of a shield tunnel; mortar injection holes are formed between the stirring piles and the shield tunnel, sleeve valve pipes are arranged in the mortar injection holes, and single-way valves are arranged at the upper ends of the sleeve valve pipes; gaps are formed between the mortar injection holes and the outer walls of the sleeve valve pipes and sealed by adopting accelerated cement mortar; grouting is conducted in the mortar injection holes, the grouting effect is inspected after grouting, and unqualified sections are subjected to hole patching and grouting. According to the shield tunnel reinforcement method, the reinforcement effect on the shield tunnel is good, the tunnel stratum can be prevented from rising, the stability of a subway rail is guaranteed, and then stable running of a subway is guaranteed.

Description

technical field [0001] The invention relates to the reinforcement field of shield tunnels, in particular to a shield tunnel reinforcement method. Background technique [0002] The Huangsha-Changshou Road section of Guangzhou Metro Line 1 is a shield tunnel section, and the foundation pit and pile foundation of the project construction are close to the station and the section tunnel. Since January 2011, it has been found that there are many longitudinal cracks in the segment at the top of the K5+400~K5+483 tunnel at 10 o'clock~12 o'clock (facing the Huangsha Station). Running through the entire segment, the maximum crack width is approximately 0.58mm; most of the segments have longitudinal cracks at K5+411~K5+480 at 12 o'clock to 3 o'clock (facing Huangsha station), and the cracks are roughly in line with The descending lines are distributed in a mirror image. Among them, the segment cracking at 12 o'clock to 1 o'clock at K5+440 is more serious, and the maximum crack width ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/105
Inventor 农兴中翟利华王凌柳宪东顾锋阚少德卢小莉陈彦晖朱文彬何冠鸿袁泉阳彬武黄子进陈晓岚韦永美祝徐敏欧林夏
Owner GUANGZHOU METRO DESIGN & RES INST
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