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水电工程地质勘察中,当坝型选择、枢纽布置确定后,基岩利用高程、开挖深度和稳定坡角的确定都与岩体风化特性和风化程度有着密切关系。因此,风化岩体的工程地质特性及其分带进行深入而详细地研究,对减少开挖量,降低工程造价,加快施工进度具有重要意义,是水电工程地质勘察中一项极为重要的工作。 岩体风化是一种自然地质作用,它是岩体特性与气候(太阳幅射、大气、水)因素综合作用的结果,即随地区的岩性、构造、地貌和气候的不同而异。以往在岩体风化带的划分上,考虑了岩体的颜色变化、结构变化、破碎情况以及矿物成分和物理力学性
Hydropower Engineering Geological Survey, when the dam type selection, hub layout is determined, the use of basement elevation, excavation depth and stability of the angle are determined with the weathering of rock mass and degree of weathering are closely related. Therefore, studying the engineering geological characteristics and zoning of the weathered rock mass in-depth and detailed study is of great significance to reduce the excavation volume, reduce the project cost and speed up the construction progress. It is an extremely important work in geological survey of hydroelectric engineering. The weathering of rock mass is a natural geological effect. It is the result of the combination of rock mass characteristics and climate (solar radiation, atmosphere, water) factors, which varies with the lithology, structure, topography and climate of the area. In the past, the division of rock weathering belts, taking into account the rock color change, structural changes, broken and mineral composition and physical and mechanical properties