考虑支护结构变形的基坑土压力计算

The calculation of excavation earth pressure considering deformation of retaining structure

针对基坑土压力计算存在的不足,基于朗肯土压力理论,建立了考虑支护结构与土体相互作用的土压力计算模型。结合温克尔假定,推导出考虑基坑支护结构变形的非极限主动、被动土压力计算公式。同时,对支挡式基坑支护结构的变形分布进行了简化,提出了适用于支挡式基坑支护结构设计阶段的土压力简化计算方法。

For lack of foundation soil pressure calculation. Based on Rankine＇s earth pressure theory,and established the calculation model of soil pressure that considering retaining structure and soil interaction. In addition,according to Winkler assumption,the calculation formula for non-limiting state active earth pressure and non-limiting state passive earth pressure that considering the displacement of supporting structural was deduced. Meanwhile,the displacement distribution of retaining structure of piles in the pile anchor foundation pit was simplified. Finally,put forward a simplified calculation method of earth pressure suitable for design the pile anchor foundation pit.