深基坑开挖过程及空间效应影响的数值模拟  

Numerical Simulation on Space Effect for a Deep Foundation Pit Excavation

作　　者：商卫东[1] 聂庆科[1] 白冰[2] 吴刚[2] 

机构地区：[1]河北建设勘察研究院有限公司,河北石家庄050031 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《探矿工程（岩土钻掘工程）》2009年第1期34-37,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：结合工程实例,利用FLAC3D有限差分法分析软件对某双排桩深基坑的开挖和支护过程进行模拟,分析了开挖过程中土体位移场的变化规律。研究表明,支护结构和土体的空间受力性状、土与支护结构之间的相互作用以及施工开挖过程等均会对支护结构的受力状态和变形特性产生显著影响。此外,还讨论了双排桩之间土体刚度的变化对位移和沉降的影响,表明适当地增加两排桩之间土体的刚度能有效地减小基坑外侧土体的位移。Using the finite difference procedure FLAC^3D to simulate the excavation process of a deep foundation pit by a double-row piles retaining structure, the paper analyzed the change of soil displacement fields in the excavation process. The studies showed that the space mechanics character of retaining structure and soils, the interaction between soil and retaining structure and the excavation procedure obviously affect the displacement and settlement of the retaining structure. The paper also discussed influence of stiffness change of soil between double-row piles on displacement and settlement, the displacement and settlement of lateral soil of foundation pit could be decreased by properly increasing the stiffness change of soil between double-row piles.

关 键 词：深基坑开挖 支护结构 双排桩 空间效应 数值模拟 

分 类 号：TU473.2[建筑科学—结构工程]