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Construction method for opening of contact channel of existing shield tunnel

A construction method and communication channel technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as inadequacies, achieve the effects of shortening the processing period, ensuring safety and quality, and ensuring the construction period

Pending Publication Date: 2022-05-06
THE FIFTH ENGEERING OF CHINA RAILWAY 5TH BUREAU GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the rail roof structure, platform slab and track of the shield tunnel have been constructed, and the site does not have the conditions for segment openings, construction evacuation passages and entrance and exit passages, such as erecting full-section temporary steel supports as originally planned.

Method used

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  • Construction method for opening of contact channel of existing shield tunnel
  • Construction method for opening of contact channel of existing shield tunnel
  • Construction method for opening of contact channel of existing shield tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1: as Figure 1-16 As shown, a construction method for the opening of the connecting channel of the existing shield tunnel is as follows: firstly, the segment support and reinforcement device is used to complete the segment support reinforcement in the opening area and the affected area, and the advanced system grouting treatment is performed to achieve After the expected effect, adopt the three-pilot three-step construction method to construct the segment opening: first excavate the middle pilot tunnel, construct the middle pilot tunnel interface ring beam and column, and temporary steel support; then construct the left pilot tunnel and close the left ring beam ;Finally construct the right pilot tunnel and close the right ring beam, and remove the temporary support after the ring beam is closed and reaches the design strength; The segments are all broken in the shield tunnel and excavated outward; the internal support of the segment adopts the method of "rai...

Embodiment 2

[0120] Embodiment 2: as Figure 17-19 shown, for figure 1 The existing annular segment 1, the tunnel bottom backfill 2 installed at the bottom of the annular segment, the track 3 installed on the tunnel bottom backfill 2, the platform slab 26, the platform slab bottom side wall 4 and the rail top beam structure 5 In the existing structure, the rail top beam structure 5 is directly opposite to the track 3 and the track slab is arranged. The segment support and reinforcement device designed by the present invention includes a temporary concrete structure plate 6 on the rail top, a temporary concrete bottom longitudinal beam 7, a column 9, and a column 2 12 , column three 16, steel wedges 17 and circular arc-shaped I-steel 22, the temporary concrete bottom longitudinal beam 7 is arranged on the inner side of the bottom of the access passage opening 26, and the lower ends of a plurality of column one 9 and a plurality of column two 12 are respectively longitudinally spaced and fix...

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Abstract

The invention discloses a construction method for an opening of a contact channel of an existing shield tunnel, which comprises the following steps of: firstly, supporting and reinforcing duct pieces which do not occupy a road in an opening area and an influence range by adopting a duct piece supporting and reinforcing device; then a three-pilot-hole three-step construction method is adopted for duct piece opening construction, specifically, a middle pilot hole is excavated firstly, and a middle pilot hole connector ring beam, a stand column and a temporary steel support are constructed; a left pilot tunnel is constructed, and the left side ring beam is closed; finally, a right pilot tunnel is constructed, the right side ring beam is closed, and at the moment, totally-closed construction of the opening area ring beam is completed; and dismantling the temporary support after the ring beam is closed and reaches the design strength. According to the method, construction treatment of the existing shield tunnel evacuation channel and the entrance and exit duct piece opening can be safely and rapidly completed, the construction progress is fast, structural deformation is small, the safety quality is guaranteed, the treatment period is effectively shortened, it is ensured that a set target of a construction unit is smoothly achieved, and social benefits and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of construction and reinforcement equipment for openings of access passages of shield tunnels, and relates to a construction method for openings of connecting passages of existing shield tunnels. Background technique [0002] At present, in super-large developed cities such as Shenzhen, Guangzhou, Beijing, and Shanghai, due to the rapid development of the city and the rapid increase in social demand, it is inevitable that the government or other social institutions will require additional stations during the construction of urban rail transit. To meet the rapidly increasing traffic demand. Shenzhen Metro Line 14 started construction in early 2018 and is scheduled to open to traffic by the end of 2022. At the beginning of 2020, a tumor hospital station was added between Universiade Station and Baohe Station, about 3 kilometers away from Universiade Station and about 3 kilometers away from Baohe Station. Tum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/02E21D11/15E21D11/08E21D11/10
CPCE21D9/008E21D11/02E21D11/15E21D11/152E21D11/08E21D11/10
Inventor 周囿圆刘邦玺李红张伯湘刘坤李宣颖孙守军张俊山王国帅陈诚陶江航曾伟刘乐麻荣卿黄立斌吉斌麦柱祝涛涛晏禹
Owner THE FIFTH ENGEERING OF CHINA RAILWAY 5TH BUREAU GROUP
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