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Construction method for entering hole in vertical shaft directly above main line of subway section

A construction method and the above technology, applied in the field of urban rail transit construction, can solve the problems of inability to guarantee the construction period of undercut tunnels, long waiting time for tunnel construction, etc. Effect

Inactive Publication Date: 2018-11-13
CHINA RAILWAY ERJU 1ST ENG
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the station is large in scale, the site is narrow, the road traffic is heavy, the pipeline is dense, and the underground excavation project requires a large amount of relocation, the construction period of the underground excavation tunnel cannot be guaranteed due to the long waiting time for tunnel construction.

Method used

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  • Construction method for entering hole in vertical shaft directly above main line of subway section

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Effect test

Embodiment

[0017] Refer to attached figure 1 , this embodiment provides a construction method for entering a shaft directly above the main line of a subway section. The process is as follows: construction of the ring beam at the lock mouth of the shaft → installation of hoisting equipment → earth and stone excavation → support of the shaft wall → treatment of the horse head door → temporary guide Pit construction → middle pilot tunnel construction → construction of left line expansion excavation section.

[0018] The specific construction method is as follows:

[0019] Right above the main line of the subway section, select a suitable location to set up a shaft according to the structural form and geological conditions of the tunnel. Before the construction of the shaft, the construction of the lock ring beam is carried out first, the steel bars are tied on site, and the C25 lock ring beam concrete is poured with the supporting steel formwork. After the construction of the lock ring bea...

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Abstract

The invention provides a construction method for entering a hole in a vertical shaft directly above a main line of a subway section, and belongs to the field of urban rail transit construction. The construction method for entering the hole in the vertical shaft directly above the main line of the subway section comprises the following procedures of construction of a vertical shaft locking wellheadring beam, installation of hoisting equipment, excavation of earthwork and stonework, borehole wall supporting, horsehead door treatment, temporary pilot tunnel construction, middle pilot tunnel construction and left line excavation-expansion section construction. The construction method is used for effectively restraining the impact of vertical shaft excavation on the surrounding residents, shops and unit environment and ensuring construction safety and construction period.

Description

technical field [0001] The invention relates to a construction method for a subway section, which belongs to the field of urban rail transit construction. Background technique [0002] The line between Huansha Road Station and Zilin'an Station of Guiyang City Light Rail Line 2 is laid along Yan'an West Road, mainly located under the current main municipal road. The high-rise buildings are dense; the section is mainly located in the moderately weathered dolomite stratum, where karst is developed and the groundwater is abundant. Under such conditions, shaft construction is carried out, due to the high blasting technical requirements, the high risk of pipeline leakage, and the excavation is easy to cause support Subsidence deformation, ground and building subsidence and other accidents. The tunnel is a typical urban subway tunnel (the tunnel is located under the main municipal road in Guiyang City), shallow buried (maximum buried depth: 17m), large section (integral partition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D1/00E21D1/03
CPCE21D1/00E21D1/03
Inventor 胡崇高瞿国丽苏杰陈刚李启亮卢思维陈荣熊涛唐超龙苏凌峰王杰
Owner CHINA RAILWAY ERJU 1ST ENG
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