Research on Deformation Characteristics of Foundation Pit Support Structure

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Wang, Qingtao^1 ; Qian, Haoyong^2

College for Military Basic Education, National University of Defense Technology, Changsha, China^1

College of Aeronautics and Astronautics, National University of Defense Technology, China^2

关键词: Deformation Characteristics;    Empirical formulas;    Foundation pit excavations;    Foundation pit support;    Horizontal displacements;    Lateral displacements;    Retaining structure;    System stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022101/pdf
DOI  :  10.1088/1757-899X/452/2/022101

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Based on the theory of Bolton system stiffness, the factors of foundation pit excavation in Changsha area are analyzed, and an empirical formula is proposed. Taking Changsha Metro Line 3 as the background, Finite difference software Flac3D is adopted to simulate the excavation and analyze the law of horizontal displacement, the relationship between the system stiffness and the lateral displacement of the retaining structure is discussed. The results show that: 1) With the increase of the excavation depth of the foundation pit, the horizontal displacement of the l retaining structure is small at both ends, and the middle is large, showing a "bow" type; 2) Based on the data of foundation pit excavation of six stations in Changsha, the empirical formula for predicting the lateral displacement of retaining structure is given.