摘要
根据条形基坑的变形特征,构造出含有待定参数并满足边界条件的支护墙变形方程,将支护墙、内支撑及坑底土体视为共同作用的系统,采用土弹簧模拟被动区土体与支护墙的相互作用关系,考虑了主动土压力与墙体变形的非线性相互作用,基于最小势能原理推导出支护墙侧向变形的计算公式。结合工程实例对基坑的变形进行了分析,计算结果与监测结果吻合较好,表明所得变形解析公式能较好地反映支护体系的工作性状。
According to the deformation characteristics of strip foundation pit,the lateral deformation equation of retaining wall with undetermined parameters and satisfactory boundary conditions is put forward. The retaining wall,an inner support and the bottom soil are regarded as a system of interaction,the soil spring model is used to imitate the interaction between soil in passive area and retaining wall,at the same time considering the nonlinear relationship between active earth pressure and the deformation of the retaining wall,the calculation formula of lateral deformation of retaining wall is derived based on the minimum potential energy principle. Finally,combined with the engineering example the foundation pit deformation is analyzed,the calculation results agree well with the monitoring results,it shows that the formula can reflect the deformation behavior of supporting system.
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第S2期1859-1862,共4页
Chinese Journal of Underground Space and Engineering
关键词
条形基坑
弹性地基梁
变形
最小势能原理
解析计算
strip foundation pit
elastic foundation beam
deformation
minimum potential energy principle
analytic calculation
