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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, the construction of the waterproof layer is affected, and the tunnel is prone to leakage For the technical problems of water phenomena, provide a method for the removal and replacement of the temporary support of the tunnel inverted arch

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
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Embodiment 1

[0042] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the method for removing and replacing the temporary support of the tunnel inverted arch in this embodiment, the steps are as follows:

[0043] Step 1: According to the span of shallow-buried underground excavation subway station, the spacing of steel pipe columns, the thickness of the covering layer on the top of the station, and the load of temporary supports, comprehensively analyze and determine the longitudinal section length of the inverted arch lining and the location of the construction joint. The section length is usually two steel pipes. The distance between the pipe piles, the construction joint is set at a span of 1 / 4-1 / 5 from the steel pipe pile, and the connecting piece 5 is set on the vertical temporary support 4 after the segmentation, that is, the vertical temporary support 4 that needs to be cut off is set The connector 5, the length of the connector 5 needs to be greater than...

Embodiment 2

[0055] Such as image 3 As shown, in this embodiment, the difference from Embodiment 1 is that the step 1 also includes setting monitoring points on the vertical temporary support 4, and collecting the initial value of the settlement deformation of the monitoring point, wherein the initial value of the settlement deformation refers to The position information of the monitoring point can be used to calculate the settlement deformation of the tunnel through the position change of the monitoring point, so that the deformation of the tunnel can be monitored, the probability of tunnel collapse can be reduced, and the safety of construction can be improved.

[0056] Specifically, the height test steel bar 9 is bound on the monitoring point of the vertical temporary support 4, and the position change of the height test steel bar 9 is measured by a total station, so as to obtain the settlement deformation of the tunnel.

[0057] Further, in the step 2, each support beam of the vertica...

Embodiment 3

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

[0060] Wherein the first connecting piece and the second connecting piece are both made of I22 type steel, and are connected with the vertical temporary support 4 by welding;

[0061] Further, a first installation groove 41 is provided on one side of the vertical temporary support 4, the first connecting piece 51 is arranged in the first installation groove 41, and the first connecting piece 51 is connected with the first installation ...

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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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