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Ultra-deep shield interval air shaft tunnel-ahead and main-body-following construction method

A construction method and wind shaft technology, which can be applied in the direction of sinking, tunnel, shaft lining, etc., can solve the problems of delay in construction period and failure to construct in time, and achieve the effects of saving construction period, simple construction process and reducing safety risks

Active Publication Date: 2020-02-21
NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem in the above-mentioned prior art that the construction period is delayed or cannot be constructed in time due to untimely demolition. The present invention adopts a shield machine to go through the section air shaft or station first, and then construct the section air shaft and station. The method of the main structure and the construction method of building first and then the main body can well reduce the risk of delaying the construction period

Method used

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  • Ultra-deep shield interval air shaft tunnel-ahead and main-body-following construction method
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  • Ultra-deep shield interval air shaft tunnel-ahead and main-body-following construction method

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Embodiment 1

[0048] Such as Figure 1-10As shown, the present invention provides an ultra-deep shield interval air shaft first tunneling and then the main body construction method, the construction method includes the following steps:

[0049] Step S1, prepare the materials and equipment for the shield machine to pass through the air shaft and construct the air shaft connection wall 1. After the construction of the air shaft connection wall 1 is completed, use a triple tube high-pressure rotating tube at the outer joint of the air shaft connection wall 1. Spray piles 3 to reinforce and stop water, 1 pre-embedded grouting pipe at the connection wall of the air shaft at the entrance; the connection wall of the air shaft is 8m wide, the steel cage is hoisted in sections, and the connection of the steel cage is welded method, after the construction of the air well ground connection wall 1 is completed, three triple tube high-pressure jet grouting piles 3 are used to reinforce the water stop at...

Embodiment 2

[0142] Kunming Rail Transit Line 4 civil engineering standard 10 screw section air shaft is located in the middle of the screw shield section, the depth of the foundation pit is 32 meters, and the base is located in the confined water layer. Affected by the requisition and demolition, the construction of the wind shaft started late, but the shield machine in the screw shield section has already started, and the construction progress of the wind shaft affects the normal reception and re-start of the shield machine.

[0143] The shield machine in the screw bucket section started from Luosiwan Station to Dounan Station on January 15, 2017, and will reach the wind shaft on September 30, 2017 according to the normal excavation speed, and the wind shaft will start on March 6, 2017. According to the original program implementation plan, the acceptance conditions of the shield machine will be provided on November 30, 2017, which will affect the construction period of the shield machine...

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Abstract

The invention provides an ultra-deep shield interval air shaft tunnel-ahead and main-body-following construction method. The method includes the following steps that firstly, an air shaft concrete diaphragm wall is constructed, an air shaft portal is reinforced, a shield tunneling machine excavates and penetrates through an air shaft after the portal is reinforced, and in the tunneling process, the connection area of the air shaft and a tunnel, the joint of the tunnel and the air shaft concrete diaphragm wall and duct pieces in the ten-ring range outside the air shaft are reinforced; then latticed columns and a precipitation well are constructed until the precipitation effect of a foundation pit meets a foundation pit excavation requirement, then the foundation pit is excavated, and the duct pieces are detached; and finally, a concrete ring beam is constructed. The method is simple in construction procedure, the shield tunneling machine does not need to be used for receiving, a receiving frame does not need to be installed or detached, precipitation outside the pit, portal blasting and the like are not needed, the safety risk that the shield tunneling machine passes through the airshaft is greatly reduced, and meanwhile, the construction period is saved. The construction method is suitable for the interval air shaft which starts to work late, and is also suitable for the conditions that a stratum, penetrated by the shield tunneling machine, of the air shaft is located in the middle of a confined water layer, underground water resources are rich and the water permeability of the stratum is large.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation, and in particular relates to a construction method for an air shaft in an ultra-deep shield tunnel first and then a main body. Background technique [0002] With the further development of cities in our country, urban subways are rapidly developing into the main means of transportation to relieve urban traffic pressure. Shield construction technology is currently the main construction method for subway tunnel construction. Most of the current subway construction methods require the demolition of the auxiliary buildings on the ground before the construction of the tunnel and air shaft. Building appendages need to be requisitioned and demolished during subway construction, and land requisition and demolition work involves a lot of work. In actual work, events often occur that affect the entire subway construction period due to the process of land requisition and demolition. During the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06E21D11/10E21D11/12E21D11/38E21D1/10E21D1/16
CPCE21D1/10E21D1/105E21D1/16E21D9/06E21D11/105E21D11/12E21D11/385
Inventor 王磊杨柳枝李辉王义平潘洪涛闫建伟许立泽闫国伟
Owner NO 4 ENG CO LTD OF CHINA RAILWAY NO 9 GRP
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