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A construction method of shield over-invasion limited box culvert

A construction method and box culvert technology, applied in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve the problem of shield tunneling and other problems, and achieve the effect of good filling effect, stable strength and excellent durability.

Active Publication Date: 2020-08-28
URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of deficiencies in the prior art, the present invention provides a construction method for shield over-invasion limiting box culverts. This method is used to solve box culvert intrusion by adopting the construction technology of cleaning, backfilling and making anti-floating pressure plates for box culverts. The shield tunnel cannot be excavated due to the scope of the tunnel. This method can ensure that the shield passes through the box culvert quickly, smoothly and continuously

Method used

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  • A construction method of shield over-invasion limited box culvert
  • A construction method of shield over-invasion limited box culvert
  • A construction method of shield over-invasion limited box culvert

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The embodiment is that a certain subway depot (entrance and exit section) tunnel project shields a box culvert under a certain avenue section. The avenue is busy with traffic flow, heavy vehicles often travel, and the underground pipeline is complicated. The road and the on-bridge ramp are above the ground of the box culvert section under the outgoing line, the passage road above the ground of the box culvert section under the incoming line, and the road and on-bridge ramp above the ground of the box culvert section under the outgoing line. The shield machine adopts Tiejian heavy industry slurry shield. The total length of the box culvert is 80.5m, the width is 8.4-12.4m, the internal clear height is 3.0m, including 2 hole spans, the drainage of the box culvert is from north to south, and the south side is discharged into the sewage channel, the ...

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Abstract

The invention provides a construction method of a construction method of passing of a shield through an invading box culvert. The construction method specifically comprises the following steps: beforepassing of the shield, clearing the invading box culvert and chiseling bottom plate load-bearing bars, then, performing plain concrete backfill, and producing reinforced concrete anti-floating pressplates above the backfilled plain concrete; when the shield passes, pushing the shield through the box culvert rapidly, stably and continuously by controlling tunneling parameters, after the shield passes through the box culvert, and injecting inertia mortar adopting a special formula between a formed tunnel and the box culvert through segment lifting holes to serve as a buffer layer. Stress transfer between the formed tunnel and the box culvert is greatly guaranteed, meanwhile, seepage of underground water into bedrooms is prevented, and waterproof and anti-seepage effects of the tunnel are reinforced. By the adoption of the method, the problem that the box culvert invades the tunnel range is effectively solved, and safe and stable operation of the tunnel in the later period can be guaranteed.

Description

technical field [0001] The invention relates to a construction method of a shield over-invasion limited box culvert, which belongs to the field of urban rail transit engineering. Background technique [0002] As my country's infrastructure construction has entered a white-hot stage, urban rail transit construction has also followed the wave of infrastructure construction to continue to develop rapidly, but the underground construction situation is complicated, and there are countless underground pipelines, comprehensive pipe corridors, subway tunnels, underground buildings, etc. There are many projects under the subway passing through the existing buildings, and the domestic construction technology is still in the exploratory stage in the shield tunneling under the existing lines. Such projects have the problems of difficult construction, high technical requirements, and high risks. Once problems occur, they will be It will cause great economic loss and social impact. Therefo...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D11/08E21D11/10C04B28/14
Inventor 阳紫东李应姣张桥王智鑫郑东升李飞鹏李威
Owner URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP
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