通过对已建的一些采用表孔宽尾墩加消力池的重力 坝调研资料及理论分析，表明宽尾墩可增加水流的三维特性，降低形成水跃的第二临界 水深，从而可以使消力池底板抬高、池长缩短。因此，建议皂市水电站的泄洪消能布置亦可 采取此种形式。

Through investigating the prototype materials and th eoretical analyses of some completed gravity dams in which the composite energy dissipation systems of stilling basins with flaring gate piers of the surface ou tlets have been adopted,the study results show that the flaring gate piers can p lay the roles of increasing the threedimension character of water jet ,decreas ing the secondary conjugate depth of water jump,and thus the basin floor can be made higher and its length shorter.It is that this kind of energy di ssipation system may be used for the Zhaoshi Project. 