上海软土地区深大基坑的卸荷变形及控制

Deformation and control measures of deep and large foundation pits in Shanghai soft clay area

通过室内试验和数值分析以及工程实测,结合近年来上海软土地区深大基坑的工程实践,对深大基坑卸荷变形的影响因素和卸荷的坑内土体回弹特性以及坑周的地表沉降影响进行了研究、分析和归纳。并针对性地提出减少和控制深大基坑卸荷变形的设计对策和施工措施,以保护周边设施和环境,为软土地区的深大基坑工程提供借鉴和参考。

Based on the experiments,numerical analysis,in-situ measurement and combined with the engineering practices of deep and large foundation pits in Shanghai soft clay area,some researches were carried out on the influencing factors,the characteristics of bottom upheaving and the surrounding ground settlement of deep and large foundation.Through the above researches some measures on the design and construction to reduce the deformation of deep and large foundation pits were put forward so as to protect the surrounding facilities.It will provide some reference to similar projects.