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

摘要： 关于临坡地基承载力问题的讨论大多集中于土质边坡的情况,而对岩质边坡,特别是软岩边坡的临坡地基承载力,甚少涉及。文中讨论了极软岩厂址区的临坡地基承载力问题,采用压缩波速计算Hoek-Brown准则的各个参数,并反算岩体的摩尔-库伦抗剪强度指标,用平板载荷试验结果验证了参数的合理性;简述了极值分析的上下限定理,并将之应用于极软岩临坡地基承载力的计算;根据计算结果对极软岩边坡进行了加固,极限分析结果表明加固后极软岩临坡地基承载力满足要求。文中提出的方法为极软岩岩质边坡临坡地基承载力的计算提供了一个新的数值方法。

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