关键词:  , 临坡地基承载力, 极软岩, Hoek-Brown准则, 压缩波速, 极限分析, 上下限定理

Abstract: In view of the current literature on the bearing capacity of foundation near slope，most of the discussion focuses on the situation of soil slope，while the ultimate bearing capacity of foundation of rock slopes，especially the very soft rock slopes，is rarely discussed.The problem of ultimate bearing capacity of foundation near slopes in the very soft rock site area is discussed in this paper.The parameters of Hoek-Brown criterion are calculated by means of compression wave speed and the Moor-Coulomb shear strength index of rock mass is calculated.The rationality of Hoek-Brown criterion parameters is verified by the test results of plate loading.The upper bound and lower bound limit theorem of limit analysis is briefly introduced and applied to the calculation of ultimate bearing capacity of foundation near the very soft rock slopes.According to the calculation results，the rock slope is reinforced.The limit analysis results show that the ultimate bearing capacity of foundation near the very soft rock slopes after reinforcement meets the requirements.A new numerical method has been added to calculate the bearing capacity of foundation near the very soft rock slopes.

Key words: ultimate bearing capacity of foundation near slopes, very soft rock, Hoek-Brown criterion, compression wave speed, limit analysis, the upper bound and lower bound limit theorem