【摘要】 针对某电站在开挖中因出现大量地下水而采取回填措施致使水头下降１５．６％的状况，采取了提高前池水位和降低尾水位等措施，达到了额定功率，论证了这些措施的技术可行性和经济性，并以空化为约束条件，对尾水位的降低值进行了优化计算。更多还原

【Abstract】 A large amount of water gave off as digging base foundation of Hexi hydraulicplant in Juquan of Gansu Province , and measure of backfill was adopted. This decreases15.6%head. Therefore,rising forebay water level and reducing tail water level were done tomeet the rated power; The technical feasibility and economy of these measures are provedand the falling value of the downflow level is optimized with the restrictive conditions of cavi-tation in this paper. The consequences of operation of the sets in the power station show run-ning stable and little cavitataion. So the project suggested is feasible and it will have a re-markable advantage.更多还原