蒋家窑则水库工程地质分析及坝址比选

Engineering Geology Analysis and Dam Site Comparison of Jiangjia Yaoze Reservoir

蒋家窑则水库是一座大型拦沙水库,是符合国家水利改革发展要求的重要工程,肩负着防洪拦沙、改善生态的重要任务,文章以实地勘察资料为基础,对蒋家窑则水库工程的主要地质环境问题进行了讨论,并对坝址进行了对比分析,发现蒋家窑则水库存在库区的塌岸问题,且存在不稳定的滑坡,但不会对枢纽安全有太大影响,同时蓄水后可能会出现淹没和浸没的地质问题,建议采取措施进行预防;下坝址的右坝可能存在绕坝渗漏,上、下坝址的坝基存在变形稳定问题,应进行排水固结处理;对上、下两个坝址进行对比后,发现下坝址存在一定地质问题,因此认为上坝址的地质条件较优,应作为选定坝址。

Jiangjia Yaoze Reservoir belongs to a large sand retainingreservoir.It is an important project meeting the requirements of the national water conservancy reform and development.It shoulders important tasks offlood control,sand retainingand ecological improvement.The paper is based on field investigation data.The main geological environment problems of Jiangjia Yaoze Reservoir are discussed.The dam site is compared and analyzed.It is discovered that Jiangjia Yaoze Reservoir has the problem of bank collapse in the reservoir area.It also has unstable landslides.However,it will not have a great impact on the safety of the hub.Meanwhile,there may be inundation and immersion geological problems after water storage.It is suggested to take preventive measures.The right dam of the lower dam site may have leakage around the dam.The dam foundation of the upper and lower dam sites has deformation and stability problems.It should be treated with drainage consolidation.It is found that the lower dam site has some geological problems afterthe upper and lower dam sites are compared.Therefore,it is considered that the upper dam site has better geological conditions,which should be chosen as the dam site.