路基工程Issue(4)：175-179,195,6.DOI:10.13379/j.issn.1003-8825.2017.04.36
北京某深基坑开挖过程的阳角效应分析
Analysis on External Angle Effect in Excavation of a Deep Foundation Pit in Beijing
董淑海 1张雪东 2沈宇鹏 3左瑞芳3
作者信息
- 1. 中交第三航务工程勘察设计院有限公司,上海200032
- 2. 中交铁道设计研究总院有限公司,北京100088
- 3. 北京交通大学土木建筑工程学院,北京100044
- 折叠
摘要
Abstract
A deep foundation pit supporting project in Beijing was taken as an example in this paper.By using the ABAQUS finite element software,a pile anchor supporting system analysis model is established and the external angle effect in excavation of a foundation pit under different construction conditions is analyzed and compared with the actual engineering measurement results.The results showed:(① The maximum deformation of foundation pile top at the protruding position is larger than that of other parts,and the anchor force of this position is also larger in the whole excavation process;(②) The size of the external angle restricts the excavation process of the foundation pit.The smaller the size of the external angle is,the more difficult the excavation is.(③) The external angle's protruding length of the pit has a significant effect on the deformation of the pile top and the bending moment of the pile,but the effect is weaken with the increase of the protruding length.(④) Both the lateral displacement and bending moment of the pile are increased with the increase of excavation depth gradually.⑤ The maximum bulge of the foundation is greatly affected by the protruding length of the external angle and the excavation depth of the foundation pit,moreover,the longer the protruding length and the excavation depth,the more obvious the effect is.关键词
深基坑/阳角效应/桩锚支护体系/空间效应Key words
deep foundation pit/external angle effect/pile anchor supporting system/space effect分类
建筑与水利引用本文复制引用
董淑海,张雪东,沈宇鹏,左瑞芳..北京某深基坑开挖过程的阳角效应分析[J].路基工程,2017,(4):175-179,195,6.
