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一、对破碎带地基的鉴别所谓破碎带地基,主要是由于岩体原生结构面受到地壳运动形成褶曲与断层,继而在长期大气或水的影响下,产生风化或侵蚀的破坏面。大者与溶隙、溶沟、溶洞相串连,小者形成风化软弱夹层,其破裂缝隙不仅随层理发育,而且由于各种应力的作用,断裂缝往往又是多向交错的。总之,破碎带就是整体岩层被裂隙分割而成的片状、块状或犬齿交错互相楔合,但又不尽规则的岩石地基。作为工程地基的破碎岩带,是指其岩体厚度至少有数米以上,而且没有软弱下卧层者。
First, the identification of the fracture zone foundation The so-called fracture zone foundation is mainly due to the rock body’s primary structural surface is formed by crustal movement and fault formation, and then under the influence of long-term atmospheric or water, produce weathering or erosion damage surface. The big ones are connected with gaps, dissolved channels, and caverns in series, and small ones form weathered weak interlayers. The fracture gaps are not only developed with bedding, but also due to the effects of various stresses, fractures are often multi-directionally staggered. In short, the fracture zone is a rocky foundation in which the entire rock formation is divided into flaky, massive, or dog-to-tooth interlaces, but it is not always regular. The crushing rock zone as the engineering foundation means that the thickness of the rock body is at least several meters and there is no weak substratum.