Case analysis of large deformation for staggered pit in soft soil foundation
The staggered layout of basements often leads to the formation of graded foundation pits,and further research is needed on the de-formation and mechanism of graded support.This paper analyses deeply the large deformation of a staggered pit in the soft soil foundation.And,the finite element model is used to comparing the huge impact of the excavation of the underground second floor pit to the underground first floor pit.The analysis results show that the support structure and the soil deformation increase significantly after the excavation of the underground second floor pit.Therefore,an overall deformation analysis should be conducted for the staggered foundation pits,and the separate design between t staggered pits is not safe.The conclusion is that the staggered distance of the basement should be maintained at 5 times or more of the excavation depth of the foundation pit.
万方数据
维普
