Method for dismantling and replacing temporary support of tunnel inverted arch

A temporary support and tunnel technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of tunnel water leakage and the impact of waterproof layer construction, and achieve the effect of ensuring waterproof performance

Active Publication Date: 2021-07-13
CHINA RAILWAY NO 2 ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: in view of the prior art, the vertical temporary support of the tunnel interferes with the construction of the waterproof layer. If the vertical temporary support cannot be removed, th

Method used

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  • Method for dismantling and replacing temporary support of tunnel inverted arch
  • Method for dismantling and replacing temporary support of tunnel inverted arch
  • Method for dismantling and replacing temporary support of tunnel inverted arch

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the tunnel tunnel is temporarily supported by the removal method, and the steps are as follows:

[0043] Step 1: According to the shallow embedded subway station span, the steel pipe spacing, the top cover layer thickness, temporary support is subjected to load, and comprehensive analysis determines the length and construction seam position of the flying arch lining, and the segment length is usually two steels. The pile spacing, the construction seam is disposed in a span from the steel pipe pile 1 / 4-1 / 5, and the connecting member 5 is provided on the vertical temporary support 4 after segmented, that is, set on the vertical temporary support 4 that needs to be truncated. The length of the connecting member 5 needs to be greater than the length of the waterproof layer 2 waterproof board to facilitate the laying of the waterproof layer 2;

[0044] The connecting member 5 is arranged...

Example Embodiment

[0054] Example 2

[0055] Such as image 3 As shown in the present embodiment, the difference from the first embodiment is that the step 1 further includes setting a monitoring point on vertical temporary support 4, and collects the initial value of the settling deformation of the monitoring point, wherein the settlement deformation initial value means The position information of the monitoring point is calculated by the positional change of the monitoring point to calculate the settlement deformation of the tunnel, thereby enabling the deformation of the tunnel to obtain monitoring, reducing the probability of collapse collapse of the tunnel, improving construction safety.

[0056] Specifically, the height test of the reinforcing bar 9 is tested on the monitoring point of vertical temporary support 4, and the position change of the reinforcement 9 is measured by the whole station, thereby obtaining the settlement deformation of the tunnel.

[0057] Further, the step 2 is subjected...

Example Embodiment

[0058] Example 3

[0059] Such as Figure 8 As shown, in this embodiment, the difference from Embodiment 1 is that in the step 1, the connector 5 includes a first connecting member 51 and a second connecting member 52, the first connecting member 51 and the first The two connector 52 is provided on both sides of the vertical temporary support 4 such that both sides of the vertical temporary support 4 are supported by the connecting member 5, the support effect is better, and the stability of the tunnel structure is improved.

[0060] The first connector and the second connecting member are connected to the welding between the I22 steel, and the vertical temporary support 4;

[0061] Further, a first mounting groove 41 is provided on one side of vertical temporary support 4, and the first connecting member 51 is disposed in the first mounting groove 41, and the first connecting member 51 is respectively connected to the first mounting groove 41. Welding on both sides;

[0062] The s...

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Abstract

The invention relates to the technical field of underground engineering, in particular to a method for dismantling and replacing a temporary support of a tunnel inverted arch. The method includes the steps that step 1, connecting parts are arranged on vertical temporary supports; step 2, the vertical temporary supports below the connecting parts are cut off, a mounting window is formed between the vertical temporary supports and a tunnel wall, and the two ends of the connecting parts are connected with the vertical temporary supports on the two sides of the mounting window correspondingly; step 3, a waterproof layer is laid on the tunnel wall in the mounting window; and step 4, supporting parts are arranged between the waterproof layer and the connecting parts. Before the vertical temporary supports are cut off, the connecting parts are arranged in advance to bear force for the vertical temporary supports to be cut off, so that the structure of a tunnel can still keep stable when the vertical temporary supports are cut off, and the mounting window is formed between the vertical temporary supports and the tunnel wall under the condition that construction safety is ensured. Therefore, smooth construction of the waterproof layer is facilitated, and the waterproof performance of the tunnel is ensured.

Description

technical field [0001] The invention relates to the technical field of underground engineering, in particular to a method for removing and replacing a temporary support of a tunnel inverted arch. Background technique [0002] With the acceleration of the urbanization process and the continuous expansion of the city scale, the connections within and between the various regions of the city are becoming increasingly close. Due to the proportion of the urban road area in the urban area, traffic congestion often occurs. As a modern mode of transportation, the subway has gradually become one of the effective measures to improve the urban transportation system with its convenient, fast, and environmentally friendly design concept and efficient, safe, and punctual operation mode. [0003] In the construction of subway tunnels, large-section caverns are usually provided with vertical temporary supports to reduce the span. The vertical temporary supports include several support beams ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/105E21D11/381Y02E10/20
Inventor 刘泽刘星源刘彬蒲晓容
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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