Construction method for assembling lining grouting reinforcement cavity based on mining method tunnel construction

A technology for tunnel construction and grouting reinforcement, which is applied in the direction of tunnel lining, tunnel, shaft lining, etc., and can solve the problems of prefabricated segments and side wall voids, etc.

Pending Publication Date: 2021-09-10
中铁隧道集团一处有限公司 +2
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  • Abstract
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Problems solved by technology

[0004] The present invention aims to provide a construction method for assembling lining grouting to reinforce cavities based on mining method tunnel construction, with simple steps and clear operations, so as to solve the problems of cavities between prefabricated segments and primary support, and between prefabricated segments and side walls

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  • Construction method for assembling lining grouting reinforcement cavity based on mining method tunnel construction
  • Construction method for assembling lining grouting reinforcement cavity based on mining method tunnel construction
  • Construction method for assembling lining grouting reinforcement cavity based on mining method tunnel construction

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Embodiment Construction

[0026] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0027] according to figure 1 — Figure 4 As shown, a construction method for the assembled lining grouting reinforcement cavity based on the mining method tunnel construction, including the following steps:

[0028] Step A. Preliminary work preparation: The side wall 1 is poured on site, and the prefabricated segments 2 are prefabricated outside the tunnel and then transported to the tunnel for group installation along the longitudinal direction.

[0029] When the prefabricated segments 2 are constructed in groups, it is best to use 5 prefabricated segments 2 as a group for the first time, then 6 prefabricated segments 2 as a group, and the last group as 7 prefabricated segments 2 Install and backfill grouting.

[0030] The prefabricated segment 2 is provided with two radial grouting holes 21 whose outer wall does not penetrate, and the two radial grou...

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Abstract

The invention discloses a construction method for assembling a lining grouting reinforcement cavity based on mining method tunnel construction. The construction method comprises the following steps of: step A, preparing early-stage work; step B, backfilling concrete on an arch crown and then grouting; when mortar overflows from an exhausting pipe, stopping grouting; step C, carrying out radial grouting: after punching a radial grouting hole by utilizing an electric drill, carrying out grouting by utilizing the radial grouting hole; when the mortar overflows from the exhausting pipe, stopping grouting and blocking the radial grouting hole by utilizing a grouting hole spiral pipe; step D, carrying out longitudinal seam grouting: blocking the outer surface of a joint between a prefabricated pipe sheet and a side wall by utilizing the mortar and then grouting from a longitudinal seam grouting hole; and step E, carrying out construction of a next group of tunnel linings according to the sequence of the steps A to D until all construction of secondary linings of a tunnel is finished. The construction method disclosed by the invention can be used for solving the problem of cavities between the prefabricated pipe sheet and a primary support and at a splicing position of the prefabricated pipe sheet and the side wall.

Description

technical field [0001] The invention relates to tunnel concrete lining construction technology, in particular to a tunnel arch prefabricated segment and side wall cast-in-place grouting reinforcement cavity construction method. Background technique [0002] The mining method excavation adopts the traditional construction technology of the second lining of the tunnel by injecting concrete into the vertical pouring holes at the top hole by hole, which is the principle of filling the space of the second lining by gravity self-flow of concrete. Since the fluidity of concrete is difficult to achieve an ideal state, after the concrete is poured into the tunnel vault, the entire longitudinal section of the pouring is basically distributed normally in an isosceles triangle. The larger the opening distance, the longer the waist of the isosceles triangle, which means that the gap behind the second lining is larger. This phenomenon will also change with the pressure of the concrete po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/10E21D11/00
CPCE21D11/08E21D11/10E21D11/003
Inventor 宁远思王聚山杨光华陈海锋何泉蔡建刚李成立刘盛张蕉齐如见李洋司鹏江明锋
Owner 中铁隧道集团一处有限公司
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