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Shield tunnel ventilation shaft construction method

A technology of shield tunnel and construction method, which is applied in well sinking, shaft equipment, earth-moving drilling and mining, etc., can solve problems such as affecting excavation, excavation suspension, affecting excavation efficiency, etc., so as to reduce project cost, speed up construction progress, and reduce construction costs. effect of risk

Active Publication Date: 2014-04-23
CCCC SECOND HARBOR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the shield machine's arrival at the wind shaft and its passing through the wind shaft will affect the normal excavation, resulting in a halt in the excavation, thereby affecting the excavation efficiency

Method used

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  • Shield tunnel ventilation shaft construction method
  • Shield tunnel ventilation shaft construction method
  • Shield tunnel ventilation shaft construction method

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] A kind of shield tunnel ventilation shaft construction method described in this embodiment, it comprises the following steps:

[0027] 1), reference Figure 5 , the shield tunnel is excavated and passes through the preset position of the ventilation shaft; the caisson structure 1 is prefabricated and positioned on the ground simultaneously, and the caisson structure 1 is used as the shaft of the ventilation shaft; the shield tunnel corresponding to the preset position of the ventilation shaft is formed by cutting Lining the segment 3 through the opening of the caisson structure 1, and reserving holes 4 in the well wall of the caisson structure 1;

[0028] 2), reference Image 6 , Figure 7 , the caisson structure 1 is excavated along the inner wall, so that the caisson structure 1 sinks to the range of 0.5 to 2 meters at the...

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PUM

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Abstract

The invention discloses a shield tunnel ventilation shaft construction method. A precast well-sinking structure is used as a tunnel ventilation shaft, positioning and sinking of the well-sinking structure and tunnel shield are synchronously performed, a bottom opening of the well-sinking structure and the top of a tunnel are connected into a whole by the aid of cast-in-place reinforced concrete, and an opening is formed in the top of the tunnel to form the ventilation shaft. By the method, construction risks of traditional underground continuous walls and deep foundation pits are avoided, the construction depth of the ventilation shaft is decreased, shield tunneling construction cannot be affected, risks of a shield machine entering and exiting the ventilation shaft are avoided, construction period between shield regions is shortened, and the shield tunnel ventilation shaft construction method has fine economic benefits for a shield highway or a subway tunnel needing the ventilation shaft.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a construction method for a ventilation shaft of a shield tunnel. Background technique [0002] Long-distance highway or subway shield tunnels generally need to set up ventilation shafts to meet the requirements of ventilation and smoke exhaust. At present, ventilation shafts generally use underground continuous walls to form a deep foundation pit, and the underwater concrete structure is sealed at the bottom, and holes for the shield machine to enter and exit are reserved on the wall. , and then remove the redundant tunnel segments in the air shaft, and finally construct the portal and complete the air shaft structure. This construction method requires the construction of an underground diaphragm wall structure exceeding a certain depth at the bottom of the shield tunnel. The foundation pit is deep, and the excavation of the foundation pit will cause the surrounding ground to s...

Claims

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Application Information

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IPC IPC(8): E21D1/00E21D5/04
Inventor 翟世鸿杨钊刘毅罗卫杨擎陈培帅姬付全唐炫
Owner CCCC SECOND HARBOR ENG