Top-down method secondary lining construction method for downslope inclined shaft of tunnel

A construction method and reverse method technology, which is applied in the direction of tunnel lining, tunnel lining, shaft lining, etc., can solve the problems of poor concrete pouring and adverse effects on the overall stability of the tunnel with the strength of the second-lined concrete, so as to ensure the quality of pouring and prevent trolleys Slip down and ensure the effect of safety

Inactive Publication Date: 2017-09-12
云南公投建设集团隧道工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a second lining construction method of the tunnel downhill inclined shaft using the upside-down method for the second lining of the tunnel downhill inclined shaft, so as to solve the problem that the concrete of the second lining is not densely poured at the top of the joint of the new and old second lining when the traditional method is used to construct the second lining Issues where the strength and overall stability of the tunnel are adversely affected

Method used

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  • Top-down method secondary lining construction method for downslope inclined shaft of tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown, the second lining construction method of the tunnel downhill inclined shaft reverse method, the steps include the following:

[0025] Step 1. Construction preparation: Before the secondary concrete lining, the following work must be carried out,

[0026] (1) Clean up the debris that affects the laying of the waterproof board, such as the bolt head and small pipe head that invaded the design range of the secondary lining during the initial support of the tunnel, and level it with sprayed concrete;

[0027] (2) After the assembly of the lining trolley is completed, check the rigidity of the formwork, the hydraulic system, the flatness of the formwork surface, the handling of formwork seams, and other indicators, and apply the release agent;

[0028] (3) Make a detailed map of the mileage position of the embedded parts and the embedded holes, and process the template of the embedded holes to ensure that the embedded positions are accurate;

[0029...

Embodiment 2

[0040] like figure 1 As shown, the second lining construction method of the tunnel downhill inclined shaft reverse method, the steps include the following:

[0041] Step 1. Construction preparation: Before the secondary concrete lining, the following work must be carried out,

[0042] (1) Clean up the debris that affects the laying of the waterproof board, such as the bolt head and small pipe head that invaded the design range of the secondary lining during the initial support of the tunnel, and level it with sprayed concrete;

[0043] (2) After the assembly of the lining trolley is completed, check the rigidity of the formwork, the hydraulic system, the flatness of the formwork surface, the handling of formwork seams, and other indicators, and apply the release agent;

[0044] (3) Make a detailed map of the mileage position of the embedded parts and the embedded holes, and process the template of the embedded holes to ensure that the embedded positions are accurate;

[0045...

Embodiment 3

[0056] like figure 1 As shown, the second lining construction method of the tunnel downhill inclined shaft reverse method, the steps include the following:

[0057] Step 1. Construction preparation: Before the secondary concrete lining, the following work must be carried out,

[0058] (1) Clean up the debris that affects the laying of the waterproof board, such as the bolt head and small pipe head that invaded the design range of the secondary lining during the initial support of the tunnel, and level it with sprayed concrete;

[0059] (2) After the assembly of the lining trolley is completed, check the rigidity of the formwork, the hydraulic system, the flatness of the formwork surface, the handling of formwork seams, and other indicators, and apply the release agent;

[0060] (3) Make a detailed map of the mileage position of the embedded parts and the embedded holes, and process the template of the embedded holes to ensure that the embedded positions are accurate;

[0061...

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Abstract

The invention discloses a top-down method secondary lining construction method. The construction method comprises the following steps of construction preparation, construction surveying, trolley stationing, concrete pouring, mold disassembly, tunnel lining maintenance and lining back grouting, wherein during the concrete pouring, starting from an inverted arch in the excavating face direction in the tunnel, pushing the trolley and pouring secondary lining concrete along the upslope direction, when the secondary lining concrete is reversely poured to connect secondary lining concrete with a completely poured front segment, then pushing the trolley to the inverted arch in the excavating face direction to perform secondary lining inversely, and conducting the secondary lining construction of the next circulation section. The construction method disclosed by the invention has the beneficial effects that the secondary lining is constructed by a top-down method, the concrete flows to the downslope direction during pouring as the concrete is under the action of self gravity, the concrete compactness at a secondary lining joint can be increased, the concrete pouring quality is guaranteed, meanwhile, when the top-down method is used for construction, the previously poured secondary lining is in the downslope direction of the newly poured secondary lining, and can play a part in supporting a model board trolley so as to prevent the trolley from sliding downwards, and the safety of the secondary lining construction is guaranteed.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a second lining construction method of a tunnel downhill inclined well reverse method. Background technique [0002] The second lining of the tunnel generally refers to the first ring of concrete lining in the primary support of the tunnel. "Second lining" is a term in tunnel construction. When the tunnel is excavated, move forward along the face of the tunnel, and the tunnel that has been dug thereafter needs primary support and reinforcement. "Second lining" is the molded concrete lining applied on the inner side of the primary support, which forms a composite lining together with the primary support. [0003] At present, the general tunnel secondary lining is constructed by advancing from the outside of the tunnel to the tunnel face. If the concrete is poured in the straight method, due to the large slope of the inclined shaft, the second lining concrete is easy to flow down...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/105E21D11/102E21D11/38
Inventor 李科
Owner 云南公投建设集团隧道工程有限公司
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