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An Assembled Jacking Method for Severe Collapse of Small Section Tunnel

A small-section, tunnel technology, applied in the direction of tunnels, tunnel linings, shaft equipment, etc., can solve problems such as small tunnel sections and difficult linings, achieve obvious effects, solve poorly handled problems, and have practical market application value

Active Publication Date: 2011-12-21
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of lining difficulties when the section of the tunnel is too small to be transported into the pipeline with the same diameter as the tunnel.

Method used

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  • An Assembled Jacking Method for Severe Collapse of Small Section Tunnel
  • An Assembled Jacking Method for Severe Collapse of Small Section Tunnel
  • An Assembled Jacking Method for Severe Collapse of Small Section Tunnel

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Take the diversion tunnel project of Yichang No. 2 Water Plant as an example. The tunnel mileage ranges from K0+154.85 to K2+687.585, with a total length of 2532.735m, a lining thickness of 0.35m, an inner diameter of 1.7m, an outer diameter of 2.4m, and a longitudinal slope of 1 / 1000. The tunnel adopts composite lining, and the initial lining is made of C25 concrete prefabricated blocks with a thickness of 0.15m, a width of 0.2m, an inner radius of 1.05m, an outer radius of 1.2m, and an angle of 45° at both ends. After the primary lining is completed, a 200mm thick reinforced concrete secondary lining is carried out.

[0025] During the construction process, the surrounding rock between the No. 1 flat tunnel and the No. 2 vertical shaft is pebble soil and there is a section of groundwater. The pebble soil poured into the cave in the form of mud-rock flow afte...

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Abstract

The invention relates to the field of tunnel construction, in particular to an assembling jacking method in relation to the serious collapse of a small-section tunnel. The assembling jacking method in relation to the serious collapse of the small-section tunnel is characterized by comprising the following steps: processing primary steel lining modules outside a tunnel; assembling the steel liningmodules (2) into a ring by bolts in the tunnel (1); then, jacking in by a jack (3); dividing each ring of primary steel lining into six primary steel lining modules of the same size; arranging a steel template panel on a soil facing surface; longitudinally and transversely arranging edges behind the panel; connecting the primary steel lining modules by bolts; installing the jack behind a collapsesection (4), and arranging the back rest (5) of concrete; jacking with a pipe jacking construction method; and carrying out secondary lining to reinforced concrete in the inner part by the collapse section. The assembling jacking method in relation to the serious collapse of the small-section tunnel has the advantages that the technical characteristics of the pipe jacking construction method and a shield construction method are combined, the effect is very obvious, the problem that the common collapse method cannot favorably handle can be solved, and the assembling method has practicality anda market application value.

Description

[Technical field] [0001] The invention relates to the field of tunnel construction, in particular to an assembled jacking method related to severe landslides of small-section tunnels. [Background technique] [0002] In water conservancy projects, in order to convey water or discharge floods, closed aqueducts are often excavated through mountains, called hydraulic tunnels. According to their different tasks, they can be divided into discharge tunnels and discharge tunnels. The water discharge tunnel is used to release the required water from the reservoir for irrigation, power generation and water supply; Empty reservoirs and sand discharge, etc. [0003] Because most of the tunnel areas to be excavated are groundwater breaks, and the soil quality is complex, it is easy to soften when exposed to water, the end face shrinks, and the self-stabilization ability is extremely poor, resulting in stress redistribution after the upstream of the tunnel section is poured in the early...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 岳立章张海涛张立新韩浩
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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