非对称荷载下基坑支护结构变形计算方法
Calculation Method for Deformation of Foundation Pit Support Structure under Asymmetric Load
刘逸敏 1林彤 2唐宏华 1李明广 2陈锦剑2
作者信息
- 1. 中铁二十四局集团有限公司,上海 200433
- 2. 上海交通大学,上海 200240
- 折叠
摘要
文章针对非对称受荷基坑的位移特点,基于弹性地基梁模型,以支撑轴力联系两侧墙体,提出非对称受荷基坑的整体计算模型.通过有限宽度土体的土压力求解公式计算,引入墙土摩擦角和土体内摩擦角随墙体位移的发挥公式,考虑墙体变形与坑外主动土压力的耦合作用.根据非对称受荷计算模型,得到了非对称受荷下支护结构变形控制方程,最后结合实际工程验证了算法.
Abstract
In view of the displacement characteristics of asymmetric loaded foundation pit,based on the elastic foundation beam model,the overall calculation model of asymmetric loaded foundation pit is proposed by connecting walls on both sides by supporting axial force.Through the solution formula calculation of the earth pressure of the limited width soil,the formula of the wall-soil friction angle and the internal friction angle of the soil displacing with the wall is introduced,and the coupling effect of the wall deformation and the active earth pressure outside the pit is considered.According to the calculation model of asymmetric load,the deformation control equation of support structure under asymmetric load is obtained.Finally,the algorithm is verified by practical engineering.
关键词
弹性地基梁法/有限宽土体/非极限土压力/非对称受荷/基坑开挖Key words
elastic foundation beam method/limited width soil/non-ultimate earth pressure/asymmetric loading/foundation pit excavation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据