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应用ABAQUS有限元软件,采用Mohr-Coulomb土体本构模型对武汉地区某深基坑双排桩支护结构进行三维数值计算,得出如下结论:桩间土受到挤压,并与前、后排桩协同作用;冠梁大大约束了桩顶的侧向变形,并使前后排桩的变形协调一致;随着开挖深度的增加,双排桩的挠曲变形更加明显,其反弯点有向下移动的趋势,直至基坑开挖的深度位置附近.把计算结果与工程的监测数据进行比较分析,两者变化趋势基本一致,数据相差不大,说明本次计算与工程监测基本吻合.
By using ABAQUS finite element software and Mohr-Coulomb soil constitutive model, the three-dimensional numerical calculation of the double-row piles supporting structure of a deep foundation pit in Wuhan area is carried out. The conclusions are as follows: The interaction between the piles and piles is very significant. The crown beam greatly restrains the lateral deformation of the piles and makes the deformations of front and back piles consistent. With the increase of excavation depth, the deflection of double-row piles becomes more obvious, The trend of downward movement until the depth of excavation near the location of the calculation results and the monitoring data to compare the analysis of the trend of the two basically the same, the data is not much difference, indicating that this calculation basically consistent with the project monitoring.