葛洲坝水利枢纽坝基岩体,岩层产状平缓,地层走向北东20—40度,倾向南东,倾角4—8度。坝基地层为白垩系下统河流相红色碎屑岩,是一套粘土质岩石与砂岩的互层,成岩作用差,层面结合不牢,并夹有大量的软弱夹层。是一个较典型的多层面、多夹层、由多种岩性组合、产状平缓的层状结构岩体。 Gezhouba dam foundation rock mass, rock formation is gentle, the formation to the east 20-40 degrees, the tendency of the south east, dip 4-8 degrees. The dam foundation is a Cretaceous lower fluvial red clastic rock. It is a set of interbedded layers of clayey rocks and sandstone with poor diagenesis, poor combination of layers and a large number of weak intercalations. Is a more typical multi-layer, multi-sandwich, a combination of a variety of lithology, smooth-shaped layered rock mass.