硗碛水电站大坝高123 m，采用宽级配碎石土作为高土石坝心墙防渗料。对全料场进行了大量的室内工程特性试验研究以论证使用该材料的可行性，提出了设计及施工控制标准；选用代表性土料通过现场碾压试验验证该控制标准的合理性；对坝体、坝基进行了整体三维应力应变和渗流计算，分析了各种材料控制标准的合理性和共同作用下大坝的安全性；详实论述了防渗料工程特性研究方法、过程、成果，提出了心墙防渗料设计及施工控制标准。

The dam of Qiaoqi Hydropower Project is 123m high, in which it is the first time for the spreading gradation crushed stone-earth to be adopted as the impervious material for so high an earth — rock dam in China. Study about the engineering application is conducted. First, a lot of experiments about the engineering characteristics are done indoors to analyze the feasibility fo this kind of material in whole material storage, based on which, the control standards of design and construction are recommended. Second, the representative earth sample is selected to verify if the control standard is reasonable by rolling experiments on site. Finally, the three -dimension stress and strain and seepage about the dam body and foundation are calculated to analyze the rationality of the control standard for these materials and the safety factor of the dam under all the actions together. This article states the methods, process and results of the study on the impervious materials and proposes the design and construction control standards for the impervious material used as the core wall.