Construction method for foundation pit deformation caused by insufficient rigidity of supporting system

A construction method and technology for foundation pits, which are applied in basic structure engineering, excavation, construction, etc., can solve problems such as foundation pit deformation, and achieve the effects of reducing foundation pit deformation, reducing space effects, and ensuring construction period.

Inactive Publication Date: 2021-06-18
YUNNAN CONSTR INVESTMENT FIRST SURVEY & DESIGN CO LTD
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Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a construction method for foundation pit deformation caused by insufficient rigidity of the support system in soft soil areas, which solves the deformation of the foundation pit caused by insufficient rigidity of the support system under the stress state, and at the same time ensures that the foundation Construction quality and construction period of foundation engineering

Method used

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  • Construction method for foundation pit deformation caused by insufficient rigidity of supporting system

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Effect test

Embodiment 1

[0028] A construction method of supporting support system in a soft soil region leads to a construction method of a restructuring of a foundation pit, and the construction order is first constructed from a foundation pit angle, and then the region between the angle of the base pit is taken, and finally constructs the intermediate region. , Greatly control the foundation of the foundation pit.

Embodiment 2

[0030] Such as figure 1 As shown, the stiffness of the supporting support system in the soft soil is insufficiently caused by the construction method of the foundation deformation, including the following steps:

[0031] Step 1, the foundation pit angular portion processing

[0032] The support beam is intensive, the support stiffness is large, and the deformation is characterized, the construction of the foundation pit angle is excavated, and the foundation pit angle is dug to the bottom of the four angular portion of the foundation pit, the foundation Board and foundation pit are supported by concrete backfilling, continuing to construct this area-2F underground chamber structure;

[0033] Step 2, longitudinal processing between the angle of the base pit

[0034] After the pouring base raft and concrete backfill formation is supported, the two-cross-construction, pouring two-cross foundation raft, base raft and foundation pit fertilizer grooves Concrete backfilling formation sup...

Embodiment 3

[0043] Jin Hui Financial Center project is based on the investment and development of Yunnan City Purchase Co., Ltd., of which foundation pit support project shall be treated by our company. The foundation pit area of ​​the proposed project is approximately 26,861.1 square meters, 651m per length, excavation depth 4.2m ~ 9.9m. Foundation pit support adopts single-row support pile (φ600, φ800, φ1000mm) +1 steel reinforced concrete support (1,150 * 800mm, supporting 700 * 700mm) enclosure structure;

[0044] During the completion of the construction completion, the earth-switched deformation appeared in the middle of the inner support middle support (the column spacing was too large, the transfrastation deflection) was discussed, and the participating meetings of the participating meetings were discussed. The reinforcement reinforcement scheme is taken for the support system after confirming the original design unit.

[0045] The specific operation is:

[0046]First, the support bea...

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Abstract

The invention discloses a construction method for foundation pit deformation caused by insufficient rigidity of a supporting system, and relates to the technical field of foundation engineering. According to the construction method for the foundation pit deformation caused by insufficient rigidity of the supporting system, construction is conducted from the corners of a foundation pit, then construction is conducted on an area between the corners of the foundation pit, and finally construction is conducted on a middle area, so that deformation of the foundation pit is controlled to the maximum extent. According to the construction method for the foundation pit deformation caused by insufficient rigidity of the supporting system, the problem of foundation pit deformation caused by insufficient rigidity of the supporting system in a stress state is solved by changing the construction method and the construction sequence, and meanwhile the construction safety, the quality and the construction period of foundation engineering are guaranteed.

Description

Technical field [0001] The present invention relates to the field of foundation, in particular, to a construction method of the stiffness of the supporting support system in the soft soil region. Background technique [0002] With the rapid development of urban construction and the development and utilization of underground space, the foundation pit project is more and more; foundation pit project refers to the foundation project or other underground engineering construction of foundation pit excavation, precipitation, support and Comprehensive project such as soil reinforcement, the depth of foundation pit excavation is generally ≥5m is called deep foundation pit project; foundation pit support refers to the pit wall support structure and anchor system set in the process of foundation pit excavation. The function is to stop the soil water, saving construction land, protecting the surrounding environment or utilizing exterior wall structure for building underground space, etc., t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 刘克文董天雷王城侯建伟秦庆发李廷雄李兴娥赵正高张洪宽谢志刚徐永兵王兴龙马贺雅罗予彤刘海芳
Owner YUNNAN CONSTR INVESTMENT FIRST SURVEY & DESIGN CO LTD
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