大朝山水电站枢纽区工程地质条件

通过深入、细致的勘测实践和研究工作，对大朝山水电站的工程地质条件进行了充分的揭露，并对主要建筑物的工程地质条件、主要地质缺陷以及对工程的影响进行了分析。在考虑了岩性、构造、岩体结构、卸荷和风化等诸因素后，对大坝坝基岩体进行了岩体质量类别划分。根据岩体的可利用性，将岩体划为３种：可直接利用的岩体（Ⅰ、Ⅱ类岩体）；经处理可利用的岩体（属中等岩体）；开挖清除或特殊处理岩体（Ⅴ类岩体，部分Ⅳ类岩体）。从整

Engineering geological conditions in the area of key control works of Dachaoshan Hydropower Station

Through the deep and painstaking survey and study, the engineering geological conditions in the site of Dachaoshan Hydropower Station have been fully uncovered and the engineering geological conditions and geological defects in the site of main structures and their effects on the structures have been analyzed. In consideration of the rock characteristics, formation, rock structure, unloading and weathering, the quality of rock body in the dam foundation has been classified. According to the availability of rock body, it was divided into three types: (1) directly available rock body (I and II type); (2) available rock body after treated (middle type); (3) The rock which is should be excavated to clear out or needed to specially treat (V type, part IV type). In general, the engineering geological conditions of Dachaoshan Hydropower Station is comparatively good.