摘要
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.
Three-dimensional FEM and three-dimensional modeling technology are applied to simulating pile-soil interaction.Using finite element analysis（FEA） software ABAQUS,a three dimensional model is established;and soil nonlinearity is modeled using Mohr-Coulomb constitutive relationship.Through analyzing a deep foundation with double-row piles in Wuhan area,some conclusions are drawn,including the cap beam＇s contribution to reduce the lateral deformation;synergy between two piles;with the increased depth of excavation,deflection of the double-row piles increased and the point of anti-bend move downward and getting more close to the pit bottom.A comparison in deformation and moment between calculation results and monitoring data has been carried out.The variation trend of calculation results is consistent with the monitoring data.The difference between them is small enough and the result of analysis is credible.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2010年第2期227-231,238,共6页
Engineering Journal of Wuhan University
关键词
深基坑
双排桩
支护结构
数值计算
桩土作用
deep foundation
double-row piles
retaining structure
numerical calculation
pile-soil interaction
