不同抛投料和抛投方式下的截流试验及截流效果

针对某电站二期大江截流具有戗堤龙口落差大、水流流速高、河床抗冲能力低、地质条件复杂等特点,利用水工模型试验获得了采用不同抛投料截流时的最大流速、单宽流量、单宽功率和上下游落差等龙口水力特性,提出结合当地材料同时配合一定比例大粒径材料进行截流合龙的较为经济合理的抛投方式,确定了不同抛投料投放位置、强度、次序等截流施工参数,解决了实际工程截流面临的难题。

Experimental Study on Closuer with Different Throwing Materials and Mode

According to the characteristics of big drop of gap,high flow velocity,low riverbed erosion resistance ability and complex geological conditions in second-stage river closure dike of a power station,different throwing material hydraulic characteristics of gap are obtained with the hydraulic model experiments,such as maximum velocity,discharge per unit width,unit width power and drop between upstream and downstream.The actual preparation of smaller particle size in the project closure are studied and a economic reasonable way is put forward by combining with local materials and cooperating with certain proportion large particle size materials.The closure construction parameters are determined,which include placement,strength and order of different throwing material.Thus,it solves the problems of the actual project closure.