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Tunnel secondary lining surface water seepage prevention construction method

A construction method and tunnel technology, which is applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve the problems of dampness and non-compactness, and achieve the effects of improving water seepage, good flatness, and improving color inconsistency

Active Publication Date: 2021-10-01
中铁一局集团(广州)建设工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the problem of dampness and water seepage caused by the lack of compactness and small holes behind the second lining, this application provides a construction method for preventing water seepage on the surface of the second lining of the tunnel

Method used

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  • Tunnel secondary lining surface water seepage prevention construction method
  • Tunnel secondary lining surface water seepage prevention construction method
  • Tunnel secondary lining surface water seepage prevention construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] refer to figure 1 with figure 2 , the construction method for the prevention and control of water seepage on the surface of the second lining of the tunnel includes the following steps:

[0043] S1: Build a reinforcement frame on the surface of the primary lining of the tunnel, and the reinforcement frame is laid in a circular direction; provide the main keel 1, fix the main keel 1 on the surface of the primary lining, and build longitudinal reinforcement 2 and transverse reinforcement 3 on the main keel 1, to form a steel frame.

[0044] Specifically, refer to image 3 , in this embodiment, the main keel 1 is fixed on the surface of the primary lining through pre-embedded screws, and the main keel 1 is equidistantly provided with a number of positioning grooves 11 along the length direction, and the longitudinal reinforcement 2 is bent according to the contour of the tunnel, and the longitudinal The steel bar 2 is clipped in the positioning groove 11, and the longi...

Embodiment 2

[0057] refer to figure 1 , the construction method for the prevention and control of water seepage on the surface of the second lining of the tunnel includes the following steps:

[0058] S1: Build a reinforcement frame on the surface of the primary lining of the tunnel, and the reinforcement frame is laid in a circular direction; provide the main keel 1, fix the main keel 1 on the surface of the primary lining, and build longitudinal reinforcement 2 and transverse reinforcement 3 on the main keel 1, to form a steel frame.

[0059] Specifically, in this embodiment, the main keel 1 is fixed on the surface of the initial lining by a pre-embedded screw, and the main keel 1 is equidistantly provided with several positioning grooves 11 along the length direction, and the longitudinal reinforcement 2 is bent according to the contour of the tunnel. , the longitudinal steel bar 2 is clamped in the positioning groove 11, and the longitudinal steel bar 2 and the main keel 1 are welded....

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Abstract

The invention discloses a tunnel secondary lining surface water seepage prevention construction method, and belongs to the field of tunnel construction. The method comprises the following steps of S1, building a steel bar frame on the surface of a primary lining of a tunnel, and annularly laying the steel bar frame; providing a main keel, fixing the main keel on the surface of the primary lining, and building longitudinal steel bars and transverse steel bars on the main keel to form the steel bar frame; S2, pre-embedding grouting pipes in the steel bar frame, and enabling the grouting pipes to laid in the annular direction, wherein the grouting pipes are arranged at intervals in the length direction of the tunnel, and the grouting pipes are located at the construction joint position of a second lining; S3, building a formwork trolley, and performing secondary lining pouring on the position of the steel bar frame through the formwork trolley so as to form a secondary lining structure; S4, maintaining a second lining structure; and S5, after the second lining structure reaches the preset strength, performing back circumferential grouting through the grouting pipes. The surface water seepage condition of the secondary lining is effectively avoided.

Description

technical field [0001] The application relates to the field of tunnel construction, in particular to a construction method for preventing water seepage on the surface of the second lining of the tunnel. Background technique [0002] The second lining of the tunnel means that when the external support of the tunnel is completed, the reinforcement mesh is arranged around the tunnel, and then the second lining trolley is used to seal the mold, and concrete is poured at the same time, and finally an integral reinforced concrete structure is formed around the tunnel, which plays a role of responsibility. The effect of stress on the upper part and leaving enough space for the passage of the lower part. [0003] In the existing tunnel construction, the second lining is not dense and there are tiny cavities on the top. It is more common in the actual construction process. At present, the traditional preventive measures in the industry are to fully vibrate when the tunnel second lini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105E21D11/102
Inventor 姚顺顺梁勇徐成双张璞帅李祚旭黄汉超
Owner 中铁一局集团(广州)建设工程有限公司
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