摘要
运用有限元计算软件Plaxis,对珠海十字门商务区一期工程的深基坑变形及整体稳定性进行数值计算。研究结果表明:围护结构水平位移的计算值与实测值吻合较好,采用Plaxis软件进行的数值计算结果是可靠的;随着开挖深度的逐渐增大,基坑整体稳定性安全系数逐渐减小,且第二次开挖对基坑稳定性安全系数影响较大;根据《建筑基坑支护技术规程》(JGJ 120-2012)整体稳定性安全系数不小于1.35,坑内土体开挖到设计标高后,深基坑整体处于安全状态。
With FEM software, Plaxis, deformation and global stability of the deep foundation pit in Zhuhai Shizimen Business District Phase I was calculated numerically. The study results show that the calculated and measured values of horizontal displacement of the envelop enclosure agree so well that the numerical analysis with Plaxis is reliable; as the excavation depth increases, the global stability safety factor gradually decreases, and the secondary excavation has greater influence on this factor; and according to the Technical Specification for Retaining and Protection of Building Foundation Excavations （JGJ 120 -2012）. factor is not less than 1.35. The foundation pit is in a safe state after the soil designed elevation. The global stability safety therein is excavated to the
出处
《路基工程》
2014年第4期178-182,共5页
Subgrade Engineering
关键词
桩锚支护
深基坑变形
基坑稳定性
有限元
pile-anchor support, deep foundation pit deformation, foundation pit stability, finite element
