上海软土地区深基坑回弹引起桩拉力的探讨  

Discussion on Tensile Force of Piles Caused by Subsoil Rebound in Soft Soil Area

作　　者：巢斯[1] 王磊[2] 雷小虎[2] 张金[2] 刘伟伟[2] 

机构地区：[1]同济大学建筑研究设计院,上海200092 [2]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2009年第5期88-92,共5页Structural Engineers

摘　　要：大型深基坑的基坑回弹引起的桩拉力不容忽视,工程界就发生过工程桩被拉断的案例。由于现行规范中没有相关基坑回弹引起桩拉力计算设计的规定,基坑回弹引起桩拉力的设计缺少可靠的依据。结合《建筑地基基础设计规范》(GB 50007—2002)中基坑回弹的计算方法、工程实例以及ABAQUS有限元软件,对基坑回弹和基坑回弹引起桩拉力进行了分析、探讨。考虑了基坑开挖面积、深度、工程桩的桩长、桩径和桩距等影响因素,提出了基坑回弹引起桩拉力的经验计算方法。The tensile force of piles caused by subsoil rebound of large and deep pile foundation can not be ignored, the cases have been found that the piles were pulled off in projects. As there is no normative criterion of design and calculation about tensile force of piles caused by subsoil rebound, civil engineers lack reliable basis to make a design about it. In this paper, the method about calculation of subsoil rebound in Building Foundation Design Code (GB 50007—2002 ), project examples and finite element sof...

关 键 词：基坑回弹 桩拉力 有限元 数值模拟 规范 

分 类 号：TU473.1[建筑科学—结构工程]