Deformation Analysis of Enclosure Structure of Ultra-deep Subway Foundation Pit Excavation
Based on the analysis of deformation data of the enclosure structure of ultra-deep subway foundation pit excavation,the following re-sults are obtained:With the excavation of foundation pit,the horizontal displacement of underground diaphragm wall increases with the increase of excavation depth,showing a"bow"type with large middle and small two ends.At the standard section of foundation pit,the ratio of the maximum horizontal displacement of the underground diaphragm wall to the excavation depth is between 0.069%and 0.397%,and the aver-age value is 0.213%;At the end well,the ratio of the maximum horizontal displacement of the diaphragm wall to the excavation depth is be-tween 0.030%and 0.228%,and the average value is 0.093%.The relationship between the excavation depth of foundation pit and the depth of the maximum horizontal displacement of the diaphragm wall is hyperbolic.
Subway foundation pitEnclosure structureHorizontal displacement
国家科技期刊平台
NSTL
万方数据
