Deep foundation pit structure above subway tunnel and construction method thereof

A construction method and technology of deep foundation pit, which is applied in the direction of basic structure engineering, underwater structures, excavation, etc., can solve the problems of poor strength and stability of support beams, large distance between two retaining walls, and large length of support beams, etc. Achieve the effects of improving construction efficiency, reducing the difficulty of transportation, and reducing the difficulty of installation

Active Publication Date: 2020-06-26
广东省构建工程建设有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The applicant found in the follow-up construction project that the above-mentioned technical scheme still has certain defects. Specifically, the area of ​​some deep foundation pits is relatively large, resulting in a lar

Method used

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  • Deep foundation pit structure above subway tunnel and construction method thereof
  • Deep foundation pit structure above subway tunnel and construction method thereof
  • Deep foundation pit structure above subway tunnel and construction method thereof

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] refer to figure 1 , is a deep foundation pit structure above a subway tunnel disclosed by the present invention, including a soil layer 1 and a subway tunnel 2 arranged in the soil layer 1, and also includes a bottom of the deep foundation pit for reducing the The towing beam 3 under the structural force of the soil layer 1, and several pile foundations 4 arranged in the soil layer 1 and located on both sides of the subway tunnel 2 are used to transfer the force of the towing beam 3 to the soil layer below the subway tunnel 2 1. The pile foundation 4 of the structure is set on the towing beam 3 and moved up to adjust the uneven settlement of the building. The raft 5 is set between the towing beam 3 and the raft 5 to improve the waterproof and shockproof of the towing beam 3 The earthquake-proof and waterproof layer (not marked in the figure); among th...

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PUM

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Abstract

The invention relates to a deep foundation pit structure above a subway tunnel and a construction method thereof, and relates to the technical filed of deep foundation pits. The deep foundation pit structure comprises a soil layer and a subway tunnel arranged in the soil layer, a pile foundation is arranged in the soil layer, an underpinning beam is poured at the upper end of the pile foundation,a raft is arranged on the underpinning beam, and a shockproof and water proof layer is arranged on the lower plane of the raft. Retaining walls are arranged on the deep foundation pit structure, the inner side walls of the retaining walls abut against the raft, and supporting beams are arranged between the inner side walls. A plurality of separation plates which are distributed in the length direction of the supporting beams are arranged on the raft, each separation plate is located between the two retaining walls which are symmetrical to each other, each separation plate is vertically arranged and perpendicular to the supporting beams, supporting rods are correspondingly divided into a plurality of outer supporting rods, and two ends of each outer supporting rod are correspondingly connected with the corresponding retaining walls or the separation plates. The deep foundation pit structure has the effect of improving the stability of the supporting beams.

Description

technical field [0001] The invention relates to the technical field of deep foundation pits, in particular to a deep foundation pit structure above a subway tunnel and a construction method thereof. Background technique [0002] With the development of urban subways, there are more and more foundation pit projects within the protected area of ​​urban subway tunnels. At present, there are more and more construction examples of deep foundation pits adjacent to urban subways at home and abroad, but there are relatively few construction practices of deep foundation pits above subway tunnels. The deep foundation pit project above the iron tunnel is a high-risk project. The uplift of the pit bottom caused by the excavation of the foundation pit will simultaneously drive the uplift and deformation of the tunnel below, which will cause deformation of the subway tunnel, and the allowable deformation of the subway tunnel is extremely strict; The structure of the deep foundation pit s...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D29/02E02D17/04E02D27/01E02D27/12
CPCE02D17/02E02D17/04E02D27/01E02D27/12E02D29/02
Inventor 李永文徐华勇陈壮飚余丹万霞林少鹏
Owner 广东省构建工程建设有限公司
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