Analysis of Mechanical Characteristics of Foundation Pit Excavation of Super High-rise Building in Strong Weathered Sandstone Area

[摘要] The foundation pit excavation of the natural foundation of the super high-rise building in the strong weathered sandstone area of Lanzhou is the first foundation excavation project of Gansu Province. Excavation method and soil condition affect the excavation of foundation pits to different extents. In order to obtain the excavation method of foundation pit excavation in the area, based on the local soil conditions, he ABAQUS finite element software was used to establish the 3D numerical simulation of foundation pit excavation, and the stress and deformation curves during foundation excavation were drawn. The simulation results were compared with the specifications to obtain a feasible scheme for foundation pit excavation. Then a typical soil layer was selected for excavation, and the effects of elastic modulus and cohesion on the deformation of the foundation pit during excavation were studied, the model damage cloud diagram during the foundation pit excavation process is obtained. By comparing the deformation of a certain path in the model and drawing the curve, the influence of elastic modulus and cohesion force on the excavation deformation of the foundation pit is obtained. At the same time, this article can also provide reference for similar projects in the future.

[发布机构] College of Civil Engineering and Architecture, Hebei University, Baoding, HEBEI; 071002, China^1;Hebei University, Baoding, Hebei; 071002, China^2

[学科分类] 环境科学（综合）

[关键词] 3-D numerical simulation;Abaqus finite element software;During excavations;Foundation excavations;Foundation pit excavations;Mechanical characteristics;Stress and deformation;Super high-rise building