摘要
当前的深基坑工程设计多以变形控制为主。对于特定地层条件下,增加支护结构体系的整体刚度是控制基坑变形的主要途径。提高围护结构的抗弯刚度可以降低基坑的变形,且通过增加围护结构刚度的方式来控制变形,不会对基坑后续施工产生影响。借助PLAXIS2D有限元软件,并采用土的HS本构模型,系统研究了悬臂支护、单支点支护以及多支点支护条件下,支护桩墙抗弯刚度对基坑最大水平位移和最大地表沉降的影响规律。通过对不同支撑条件下,抗弯刚度对变形的影响规律总结分析,为深基坑支护变形控制优化设计提供参考。
The deformation control is as the main in deep foundation pit engineering design in current. For the specific stratum conditions, increasing the overall stiffness of the supporting structure system is the main way to control the deformation of the foundation pit. Improving the bending rigidity of the retai- ning structure can reduce the deformation of the foundation pit, and by increasing the stiffness of the building envelope to control the deformation will not affect the subsequent construction of the foundation pit. With the help of PLAXIS2D finite element software, using the HS constitutive model of soil,the in- fluence law for the maximum horizontal displacement and the maximum ground settlement by the bending stiffness of the support pile wall is studied systematically under the condition of cantilever support, single point support and multi points support. Through analysing and summaried the influence rule of the ben- ding rigidity to the deformation under different supporting conditions, the paper provides reference for the deformation control optimization design of the deep foundation pit supporting.
出处
《勘察科学技术》
2017年第1期1-6,共6页
Site Investigation Science and Technology
基金
中建股份技术中心科技研发课题(CSCEC-2015-JQ-02)
关键词
深基坑
桩墙刚度
有限元
变形控制
deep foundation pit
pile wall stiffness
finite element
deformation control
作者简介
秦会来（1979-），男，博士、博士后，主要从事基坑工程设计与研究。
