不同支护形式下基坑坑底回弹隆起数值分析  

Numerical Analysis of Foundation Pit Rebound Uplift under Different Supporting Forms

作　　者：王福彬[1] Wang Fubin(Nanjing Municipal Design and Research Institute Co.,Ltd. Nanjing 210008,China)

机构地区：[1]南京市市政设计研究院有限责任公司,南京210008

出　　处：《广东土木与建筑》2019年第1期24-30,共7页Guangdong Architecture Civil Engineering

摘　　要：采用三维有限元方法研究了不同支护形式下对坑底回弹隆起的影响,讨论了基坑位置,预加轴力,支撑间距、入土深度以及围护刚度对坑底回弹隆起的影响分析;研究表明,基坑围护结构对坑底回弹隆起有限制作用,基坑坑底回弹隆起具有明显的空间效应;改变锚固段的长度对坑底回弹隆起的影响不是很大。对于内支撑的形式,支撑等间距的增大,坑底回弹隆起却随之减小,而且减少的幅度大致相同。The effect of different support forms on the rebound uplift of the bottom of the pit is studied by the three-dimensional finite element method,and the influence of the position of the foundation pit,the preloading force,the spacing of the support,the depth of the earth and the stiffness of the enclosure on the rebound uplift of the bottom of the pit are discussed. The results show that the retaining structure of foundation pit has limited effect on the rebound uplift at the bottom of the pit,and the rebound uplift at the bottom of the pit has obvious spatial effect. The effect of changing the length of anchorage segment on rebound heave is not great. For the form of internal support,the rebound heave at the bottom of the pit decreases with the increase of the equal spacing of the support,and the reduction amplitude is approximately the same.

关 键 词：基坑支护 ABAQUS 坑底回弹隆起 数值分析 

分 类 号：TU433[建筑科学—岩土工程]