Method for building subway station by expansively digging large-diameter shield tunnel

A technology for shield tunnels and subway stations, which is applied in tunnels, earth-moving drilling, mining equipment, etc., can solve problems such as increased construction risks and difficult subway line layout, and save engineering costs, shorten engineering construction period, safety and construction period. Guaranteed effect

Inactive Publication Date: 2012-03-28
BEIJING RAIL TRANSIT CONSTR MANAGEMENT +6
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Problems solved by technology

These complex construction environments have brought huge obstacles to the construction of subway projects, which may lead to difficulties in the la...

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  • Method for building subway station by expansively digging large-diameter shield tunnel
  • Method for building subway station by expansively digging large-diameter shield tunnel
  • Method for building subway station by expansively digging large-diameter shield tunnel

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Embodiment Construction

[0059] See Figure 1-3 , Respectively are schematic diagrams of the cross-section of the double-arch station of the present invention (expanded excavation by tunnel pile method), the upper cross-section of the excavated platform tunnel, and the lower cross-sectional view of the excavated platform tunnel. Taking the hole pile method in the shallow burying and undercutting method as an example, the specific construction method of the present invention when a large-diameter shield tunnel is expanded to construct a subway station includes the following steps:

[0060] (1) Large-diameter shield tunnel construction passes through the station, and large-diameter shield tunnel segments for the station are assembled within the station;

[0061] (2) Construct bottom beam-rectangular column 6-top beam in the large-diameter shield tunnel, and erect temporary supports 10;

[0062] (3) Adopt the tunnel pile method to symmetrically expand the upper part of the platform tunnel 8, including the excav...

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Abstract

The invention relates to a brand new method for building subway station by expansively digging large-diameter shield tunnel; namely, based on the large-diameter shield tunnel, the subway station is dug and built by shallow bedding and undercutting method. The invention mainly comprises the following steps: (1) assembling the large-diameter shield segments for the station in the range of the station; (2) building bottom girder, rectangular column and top girder in the shield tunnel, and establishing a temporary support; (3) symmetrically digging first supporting protection of the platform tunnel by the shallow bedding and undercutting method; (4) symmetrically removing the shield segments, the temporary support and other temporary structures; (5) constructing the second lining and platform panel of the platform tunnel. The invention gives full play of the advantages of the shield method and the shallow bedding and undercutting method, which can largely reduce the influence to the surrounding environment and adjacent building structures under complex construction environment of city; the construction period is shortened and the project cost is decreased.

Description

Technical field [0001] The invention relates to a method for expanding a large-diameter shield tunnel to construct a subway station, and belongs to the technical field of underground construction engineering. Background technique [0002] At present, the construction methods of Beijing subway mainly include open-cut method, shallow-buried and concealed method, and shield method. The construction of subway sections generally adopts the shield method; the stations generally adopt the open excavation method or the shallow buried excavation method. Interval shield construction is often restricted by station construction, which makes the advantages of shield construction not fully utilized, resulting in the extension of the construction period and the increase of construction costs of subway lines. [0003] With the densification of Beijing's rail transit network, subway construction is facing an increasingly complex environment: narrow roads, heavy ground traffic, a large number of ne...

Claims

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Application Information

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IPC IPC(8): E21D9/00
Inventor 魏怡乐贵平杨秀仁颜莓关龙刘军鲁卫东江玉生袁大军杨思忠李爱民丁德云刘维宁郭玉海曾德光郭德友赵衍发路宗存庞振勇张彦王文军程小虎李宏安徐凌汪挺杨寒冰陈衡达
Owner BEIJING RAIL TRANSIT CONSTR MANAGEMENT
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