三里坪水利枢纽引水发电建筑物总体布置设计

Overall design and layout of water diversion and power generation structure of Sanliping Hydropower Station

为了适应三里坪大坝坝区河段的地形特点,确定了其引水发电建筑物应布置在右岸的总体思路,且输水线路应采用直线形布置以使线路长度最短。该电站引水发电建筑物包括进水口、引水和尾水隧洞、地下厂房和尾水出口等,介绍了其具体布置和设计要点。结合电站复杂的地形地貌情况,分析了地下厂房洞室群的围岩稳定性,提出在局部塑性区加强支护的措施来保障洞室安全性。

According to the characteristics of topography of river reach at dam site,the overall layout of water diversion and power generation system of Sanliping Hydropower station is designed,in which,the water diversion and power generation structures should be placed in the right bank and straight water conveyance line is adopted to make it the shortest.The water diversion and power generation structures include intake,water diversion tunnel and tailrace tunnel,underground powerhouse and tail water outlet.The specific layout and key points of its design are introduced.The stability of surrounding rock of the underground powerhouse are analyzed aiming at the complex topography and geomorphology of the dam,and the measures of enhancing the support of local plastic zone are suggested to ensure the safety of the caverns.