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Stress and formation analysis method for deep foundation pit engineering structure under complex conditions

A technology for engineering structure and deformation analysis, applied in basic structure engineering, excavation, construction, etc., can solve problems such as poor soil conditions and complex surrounding environments

Active Publication Date: 2012-07-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Application Information

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Problems solved by technology

The area has poor soil conditions, is rich in confined water layers, and the surrounding environment is complex. Its scale and complexity are unprecedented, and the design and construction are facing great challenges

Method used

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Embodiment

[0018] The stress and deformation analysis method of deep foundation pit engineering structure under complex conditions is as follows: the numerical analysis of the foundation pit excavation process is carried out using finite element analysis software such as PLAXIS and ANSYS, and the underground diaphragm walls in each main construction stage are obtained. Horizontal deformation, hoop stress, bending moment and shear force are used to study the influence of seepage, temperature, asymmetric construction load, lining and other factors on the internal force and deformation of the envelope. Analyze the vertical stiffness and bearing capacity of the upright piles, uplift piles, and ground connection walls during the excavation stage of the foundation pit and the normal use stage. On this basis, the finite element method is used to analyze the Deformations and internal forces of subsurface structures in stages. Based on the theory of transverse isotropic elasticity, a composite fo...

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Abstract

The invention relates to a stress and formation analysis method for a deep foundation pit engineering structure under complex conditions. The analysis method mainly comprises the following aspects of: (1) stress and deformation analysis of a space enclosing structure during the construction stage; (2) stress and deformation analysis of an underground structure during the construction and using stage; (3) contrastive analysis of measured data during excavation of a foundation pit. Compared with the prior art, the stress and formation analysis method disclosed by the invention has the advantages of reasonable design, effective guide of site construction and abnormal situation treatment, good safety and reliability of the structure and the like.

Description

technical field [0001] The invention relates to a deep foundation pit engineering, in particular to a method for analyzing the stress and deformation of the deep foundation pit engineering structure under complex conditions. Background technique [0002] Many important achievements have been made in the research of deep foundation pit engineering. my country's Ministry of Construction and the Ministry of Metallurgy have successively promulgated industry standards for building foundation pit engineering, and various localities have also successively promulgated local technical regulations for building foundation pits. However, with the deepening of foundation pit depth, the emergence of new support methods and construction techniques, and people's higher requirements for the safety of foundation pit engineering, ultra-deep foundation pit engineering has brought us more new problems. Ultra-deep foundation pit engineering is a more complex system engineering, and there are mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02
Inventor 陈祖元陈峥朱伟林王卫东王杰高倚山徐勍乐俊律王沪生刘晓东
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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