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拉西瓦水电站引水发电系统布置在拱坝右岸山体内,原1、2号进水口为低位进水口,原定1、2号机组先发电。但由于地形、地质条件不利,进水口边坡施工比预计的难度大,开挖及支护工程严重滞后,影响了右坝肩开挖关键工期的实现;1、2号引水压力钢管也只能最后安装,影响初期发电的时间。优化设计中调整了机组发电次序,6、5号机先发电,优化了进水口的布置,使右岸坝肩槽开挖工程提前20 d完工;解决了原方案压力钢管的安装顺序与发电次序完全相反的矛盾,使引水系统工程完工时间缩短约6个月,对确保初期发电意义重大。
Laxiwa hydropower station diversion power generation system is arranged in the right bank of the arch dam mountain, the original inlet No. 1 and No. 2 for the low water inlet, the original unit 1,2 generating power. However, due to the poor topography and geological conditions, the water inlet slope construction is more difficult than expected and the excavation and support works lag seriously, which has affected the key construction period of the right abutment excavation. The final installation, affecting the initial power generation time. In the optimized design, the order of unit power generation was adjusted. The power generation of generators 6 and 5 was optimized first to optimize the arrangement of water intakes so that the excavation of the right bank abutment and shoulder trench was completed 20 days ahead of schedule. The installation procedure of the pressure pipe and the complete sequence of power generation were solved The opposite contradiction, shortening the completion time of the water diversion system project by about 6 months is of great significance to ensure the initial power generation.