An inverse analysis of weak structural plane parameters for a limestone foundation pit based on critical stability

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Jun Yan, L.I.U.^1,2 ; Xiang Hua, Song^1,2 ; Yan, L.I.U.^1,2

School of Civil Engineering and Architecture, University of Jinan, Jinan

250022, China^1

Eng. Technol. Res. Ctr. for Urban Underground Eng. Supporting and Risk Monitoring of Shandong Prov., China^2

关键词: Critical inclination;    Deformation Characteristics;    Design and construction;    Fast Lagrangian analysis of continuum;    Mohr-Coulomb strength criterion;    Rock foundation pits;    Structural surfaces;    Weak structural plane;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012201/pdf
DOI  :  10.1088/1755-1315/94/1/012201

来源: IOP

【 摘 要 】

The article uses the Fast Lagrangian Analysis of Continua in 3 Dimensions (FLAC3D) to make an analysis of the deformation characteristics of the structural plane, which is based on a real rock foundation pit in Jinan city. It makes an inverse analysis of the strength of the surface structure and the occurrence of the parameters by Mohr-Coulomb strength criterion value criterion in the way of numerical simulation, which explores the change of stress field of x-z oblique section of pit wall and the relation between the exposed height of structural plane and the critical cohesion, the exposed height and critical inclination angle of the structure surface. We can find that when the foundation pit is in the critical stable state and the inclination angle of the structural plane is constant, the critical cohesive force of the structural plane increases with the increase of the exposed surface height. And when the foundation pit in the critical stability of the situation and the structural surface of the cohesive force is constant, the structural surface exposed height increases and the structural angle of inclination is declining. The conclusion can provide theoretical basis for the design and construction of the rock foundation pit with structural plane.