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大坝的安全一般受岩体稳定条件的控制。影响岩体稳定的地质因素较多,其中软弱结构面的影响极为重要。软弱结构面即夹有软弱物质的结构面,例如夹有泥质充填物的裂隙,夹有断层泥、糜稜岩、角砾岩的断层破碎带等。软弱夹层为软弱结构面的一种,即除夹有软弱物质这一特征外,在产状上大致和岩层产状一致,并和成岩作用有一定关系。含有泥质物的软弱夹层一般俗称为“泥化夹层”。
Dam safety is generally controlled by the stability of rock mass. There are many geological factors that affect the stability of rock mass, and the influence of weak structural plane is very important. Weak structural surface is the structural surface with weak material, such as fractures with muddy filling, fault mud with mound, mylonite and breccia. The weak interlayer is a kind of weak structural plane, which is similar to the rock formation in its shape except for the feature of the weak matter, and it is also related to diagenesis. The weak intercalation of muddy matter is commonly known as “muddy intercalation.”