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Expansion method for existing subwayunderground excavationoverlapping island transfer station

An existing subway and underground excavation technology, applied to buildings, artificial islands, underground chambers, etc., can solve the difficulty of large-scale renovation and expansion. Complex environment and other issues, to achieve the effect of reducing construction risk, reducing project cost, and mature and reliable technology

Active Publication Date: 2019-06-07
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology

[0003] Underground excavation of subway stations with stacked islands is buried deep, construction is difficult, and the surrounding environment is generally more complex. The difficulty of large-scale renovation and expansion is significantly higher than that of open excavation stations.

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  • Expansion method for existing subwayunderground excavationoverlapping island transfer station
  • Expansion method for existing subwayunderground excavationoverlapping island transfer station
  • Expansion method for existing subwayunderground excavationoverlapping island transfer station

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Embodiment Construction

[0039] Hereinafter, the present invention will be described in detail with reference to the drawings and embodiments:

[0040] Such as Figure 1~8 As shown, an extension method of an existing subway digging an island transfer station includes the following steps:

[0041] Ⅰ. Dewatering construction is carried out through multiple dewatering wells to reduce the groundwater below the elevation of the bottom of the foundation pit.

[0042] Ⅱ. Construction of open-cut enclosure structure.

[0043] Ⅲ. Use the same method to construct the new open-cut platform structure, and reserve the interface ring beam on the side wall of the underground excavation connecting channel.

[0044] Ⅳ. Construct the initial support of the connection channel by digging the lowest layer, and construct the secondary lining of the channel after the monitoring data is stable.

[0045] Ⅴ. Construction of the initial support and the secondary lining of the underground excavated connecting channel from bottom to top.

...

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Abstract

The invention discloses an expansion method for an existing subway underground excavation overlapping island transfer station. Expansion can be conducted by constructing an external-hanging open excavation platform structure on one side of an existing transfer station, and the newly-established external-hanging open excavation platform structure and the existing transfer station are connected through an underground excavation connecting channel constructing from one side of the open excavation structure. According to the expansion method for the existing subway underground excavation overlapping island transfer station, by newly-establishing the open excavation platform structure, the width of the station platform doubled; transfer passengers in the existing overlapping island station halved, and thus the transfer ability of the existing station is improved in a multi-fold mode. According to the expansion method for the existing subway underground excavation overlapping island transferstation, the newly-established connecting channel is constructed by using an underground excavation method, the engineering occupation land is reduced, and influence on road traffic is avoided. According to the expansion method for the existing subway underground excavation overlapping island transfer station, construction such as construction of the newly-established channel and existing stationport, diversion of existing cables and transformation of station gates and signal systems are all conducted in skylight time to avoid the influence on operation of stations.

Description

Technical field [0001] The invention belongs to the technical field of expansion of existing subway stations, and specifically relates to an expansion method of an existing subway digging and island transfer station. Background technique [0002] With the population growth of many cities and the improvement of the subway line network, the passenger flow pressure of subway transfer stations is gradually showing. The existing transfer capacity cannot meet the actual passenger flow needs. The transformation and expansion of existing subway stations will be faced in the future for subway construction. The problem. [0003] The underground excavated island transfer station of the subway is buried deep, the construction is difficult, and the surrounding environment is generally more complicated. The difficulty of large-scale reconstruction and expansion of it is significantly higher than that of the open-cut station. Summary of the invention [0004] The present invention is proposed in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/15E02D29/045
Inventor 王奇邵标康直张建国王世清朱占国谭小兵关永平聂子云孙紫强吕宝伟俞尚宇
Owner CHINA RAILWAY DESIGN GRP CO LTD
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