针对上硬下软近水平双层岩基的破坏过程，考虑软弱下伏岩层对应力分布的扩散效应，提出双层岩基极限承载力的计算方法。
On the basis of analyzing the failure process and considering the influence of stress spreading, the method determining ultimate bearing capacity of double layer rock foundation is put forward.
特殊岩性地层的存在往往会干扰其下伏正常地层在地震剖面上的真实反映。
Existence of special lithologic strata often causes interference with actual reflection of its underlying normal formation on profile.
华北石炭纪岩溶型铝土矿的主要物质来源为下伏的晚寒武世—中奥陶世碳酸盐岩。
The material source of the Carboniferous karst type bauxite in North China mainly came from the underlying Late cambrian-middle Ordovician carbonate rock.
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