Based on the engineering background of Clinical Research Hospital of Chinese Academy of Sciences,a support system combining row piles and diagonal bracing is adopted,and the ABAQUS finite element software is used to establish the constitutive model.The change law of the horizontal displacement of the pile top and the axi-al force of the diagonal bracing during the construction of foundation pit in hospital is analyzed,and its diagonal bracing spacing is changed to analyze the impact on it.Firstly,the horizontal displacement of the pile top and the axial force of the inclined support are simulated,and it is found that both the horizontal displacement of the pile top and the axial force of the inclined support increase with the increase of the excavation depth of the foundation pit.The maximum value occurs at the depth of 10 m,and the maximum horizontal displacement of the pile top is 24.13 mm.The maximum axial force of the inclined support is 600.85 kN,both of which do not exceed the warn-ing value;Compared with the on-site monitoring data,it is found that the variation patterns of the two are basical-ly consistent,which verifies the effectiveness of the numerical analysis.Finally,the diagonal support spacing is changed to 6 m,8 m,and 10 m,respectively,and compared with the original diagonal support spacing.Through a-nalysis,it is found that the original engineering plan has the most reasonable diagonal support spacing.
关键词
排桩+斜支撑支护/有限元分析/桩顶水平位移/斜支撑轴力/斜支撑间距
Key words
pile arrangement+diagonal support/finite element analysis/horizontal displacement of pile top/di-agonal support axial force/diagonal support spacing
维普
万方数据