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在长冈电站大坝坝基白垩纪地层中的夹层,因受邻近断层与火成岩体的侵入影响,基岩硅化变质,岩性致密坚硬,力学强度甚佳,夹层虽较上下围岩为差,属坝基剖面中的一个弱面,但却仍具有一定的强度,工程建筑特性并不很低劣,很有其特殊性。笔者系根据它的成因,分布与性状,命名为块裂岩体缓倾角层面裂隙挤压破碎夹层,以软弱夹层中的一种特例进行工程地质条件的论述与评价,同时对该坝基深层抗滑稳定及其侧向切割面的抗滑力问题进行了分析,并对加固处理措施进行了探讨。但由于笔者水平所限,不当之处,敬希指正。
Because of the invasion of adjacent faults and igneous rocks, the bedrock metamorphism, the lithology is dense and hard, and the mechanical strength is very good. The interlayer is inferior to the upper and lower surrounding rocks in the Cretaceous, A weak surface in the dam foundation profile, but still has a certain strength, engineering construction characteristics are not very poor, very particularity. Based on its genesis, distribution and traits, the author named as the crushing and crushing interlayer at the gentle dip angle of block rock mass, and discusses and evaluates the engineering geological conditions with a special case of weak intercalation. At the same time, Stability and lateral sliding surface of the anti-sliding force were analyzed, and reinforcement measures were discussed. However, due to the author’s level of limitations, inappropriate, King Greek correction.