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我国幅员辽阔,地质条件复杂多样。这些复杂的自然条件不可避免的给水利工程的兴建带来一系列的工程地质问题,软弱岩石就是其中之一。有人对大中型水利建设的混凝土坝和砌石坝作了统计,其中四分之三的工程都遇到软弱岩石或软弱夹层问题。由此可见这一工程地质问题的普遍性。 一、软弱岩石(层)的主要工程特性 通常认为,软弱岩石具有下列四方面特征: 1.强度低:包括抗压强度和抗剪强度。成岩作用差或后期变化(风化、溶滤、构造破坏)导致强度降
Our country is vast in size and diverse in geological conditions. These complex natural conditions inevitably bring a series of engineering geological problems to the construction of water conservancy projects, of which weak rocks are one of them. Statistics were made on concrete dams and masonry dams for large and medium-sized water conservancy projects, of which three-fourths of the projects encountered weak rock or weak interlayer problems. This shows the universality of this engineering geological problems. First, the main engineering characteristics of soft rock (layer) It is generally believed that the soft rock has the following four characteristics: 1. Low strength: including the compressive strength and shear strength. Diagenesis is poor or late changes (weathering, leaching, tectonic damage) lead to decreased strength