基于PLAXIS基坑围护桩水平位移特性的分析  

Study of horizontal displacement of pile enclosure based on PLAXIS

作　　者：刘霁[1,2] 贺晨[3] 

机构地区：[1]中南林业科技大学土木工程与力学学院,湖南长沙410004 [2]湖南城市学院土木工程学院,湖南益阳413000 [3]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中南林业科技大学学报》2011年第8期142-146,共5页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金资助项目(50774092);全国优秀博士学位论文专项资金资助(200449)

摘　　要：在实际的基坑工程中,使用大型有限元软件PLAXIS对基坑开挖阶段时支护结构变形特性进行了分析,对开挖时围护桩的水平位移变化进行了分析。结果表明:施加预应力对围护桩位移影响较大,是控制围护结构的一种较为有效的方法;而使用Hardening-soil模型进行分析时,可以更好地描述土体卸载的特性,结果也更准确。By taking a real foundation pit engineering as an example, the deformation characteristics of supporting structure of a deep foundation pit at excavation stage was simulated by means of a finite element software PLAXIS, and the horizontal displacement of supporting pile was measured and analyzed. The results show that the prestressed pile had a great impact on displacement of pile enclosure, which is a more effective way to control the envelope; the Hardening-soil model analysis was used to describe the characteristics of the soil unloading, and the results indieate that the Hardening-soil model had a better analytical accurate.

关 键 词：岩土工程 基坑支护 围护桩 预应力锚杆 PLAXIS程序 

分 类 号：TU413.62[建筑科学—岩土工程]