Baishe villagers have inhabited loess pitted courtyard cave dwelling for hundreds of years in Sanyuan County of China.The sizes of local cave dwellings are mastered by field measurements,and variational regularity is summarized of average annual and monthly rainfall.By the soil routine and triaxial test,the physical and mechanical parameter is acquired with loess samples in different water content.At the same time,based on the literature datas,the relationship is established between rainfall and water content.Then,the definition of safety factor is given for loess cave dwellings in different depths,making use of the expressions of the surrounding rock loop stress and the Mohr-Coulomb intensity criterion.In the end,the variation of stability of loess cave dwelling could be analysed under different rainfall.
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