达友水库坝址工程地质比选

Dam site engineering geological comparison and selection for Dayou Reservoir project

根据国际大坝失事和事故委员会的统计,由坝基工程地质缺陷引起的大坝失事占到了失事原因的36%,是各个专业之首。由此可知,工程地质在可行性研究阶段对坝址的选择起到至关重要的作用。以达友水库为例,从区域构造稳定性、地形地貌、河流条件、地层岩性、地质构造、岩体风化、水文地质、不良地质现象等方面综合比对坝址的工程地质条件。最终从地质的角度选取下坝址为推荐坝址。

According to the statistics of the International Commission On Large Dams,geological engineering defects led to the largest proportion of dam accidents up to 36%.Engineering geology plays an important role in the selec⁃tion of dam sites at the feasibility study stage.Taking Dayou Reservoir project as example,the engineering geologi⁃cal conditions of dam sites were compared in respects of regional structural stability,landform,river condition,stratigraphic lithology,geological structure,weathering of rock mass,hydrogeology and adverse geological phenome⁃na before the lower dam site was recommended finally.