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Construction method for stopping water and reinforcing end of shield tunnel in lithosphere

A technology for shield tunnels and rock formations, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as increasing construction costs, blocking imperfect construction methods, extending construction periods, etc., to ensure construction period, reduce construction costs, The effect of satisfying the intensity

Inactive Publication Date: 2015-04-22
HAINAN UNIVERSITY
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a water-stopping reinforcement at the end of a shield tunnel in a rock stratum in order to solve the problems of prolonging the construction period and increasing the construction cost caused by the imperfect construction method of blocking the fissure water in the existing rock strata construction method

Method used

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  • Construction method for stopping water and reinforcing end of shield tunnel in lithosphere

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Embodiment Construction

[0024] The construction method for water-stop reinforcement at the end of a shield tunnel in a rock stratum provided by the present invention, its specific method is as follows:

[0025] The first step, the formulation of the process flow, the specific process flow is as follows:

[0026] Remove surface obstacles→positioning and setting out→sinking into the grouting pipe→slurry mixing→sealing the upper part of the grouting→lifting the grouting pipe from top to bottom and grouting in sections→finishing the grouting→transfer to the next grouting hole;

[0027] The second step, the construction specific requirements are as follows:

[0028] 1. Arrangement of layered grouting holes: arrange a row of layered grouting holes close to the enclosure structure, the distance between the grouting holes is 0.5m, the diameter of the grouting pipe is Ф25mm, and the head of the grouting pipe is 1 ~2m flower tube with holes on the side wall, the hole diameter is Ф3~Ф4mm, arranged in a plum bl...

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Abstract

The invention discloses a construction method for stopping water and reinforcing an end of a shield tunnel in the lithosphere. The method specifically comprises the steps of 1, preparing technological process; 2, clearing the specific construction requirements, namely, 1, layered arrangement of grouting holes, namely, arranging in plum blossom shape; 2, requirement on grouting, namely, grouting in every other holes; 3, conditions for stopping grouting, namely, the pressure exceeds 1.5 to 2 times that in design requirement, the grouted cement overflows from the hole or other places, and the grouting quantity exceeds the specified value; 4, determination of construction parameters; 5, construction of sealing the holes. The method has the beneficial effects that the end project of the shield tunnel can be constructed smoothly, the requirements on strength and impermeability are met, the construction period of the end of the shield tunnel is ensured, and the construction cost of the end of the shield tunnel is greatly decreased.

Description

technical field [0001] The invention relates to a construction method for water-stop reinforcement at the end of a shield tunnel, in particular to a construction method for water-stop reinforcement at the end of a shield tunnel in a rock formation. Background technique [0002] At present, in the construction of the end of the shield tunnel, some soil strata need to be reinforced. If it is in the rock stratum, although conventional reinforcement is not required, it is necessary to adopt corresponding construction methods and technical measures for rock formation. The water-blocking reinforcement construction of the fissure water in the stratum is to ensure the normal construction of the end of the shield tunnel. In the existing construction method of blocking the fissure water in the rock stratum, the construction method is not perfect, which seriously affects the end of the shield tunnel. The normal construction of the shield tunnel end greatly prolongs the construction per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/105E21D11/38
Inventor 胡俊佳琳
Owner HAINAN UNIVERSITY
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