小湾工程引水发电系统布置优化研究

Study on the layout optimization of power tunnel system and powerhouse of Xiaowan Hydropower Project

小湾水电站的引水发电系统位于工程枢纽区的右岸,均为地下布置,有3条三级断层F5、F10、F11通过,对三大洞室群围岩稳定有影响。为此,根据工程枢纽区地形、地质、枢纽布置、围岩稳定等条件,结合国家“九五”科技攻关和国家电力公司科技攻关项目的研究成果,在各阶段设计工作中,对地下厂房洞室群的合理布局和结构形式进行了不断地优化设计,较好地适应了实际地质地形状况,避开了主要地质缺陷。

The water diversion and power generation system of the Xiaowan Hydropower Station are arranged on the right bank where three faults F5, F10 and F11 of grade-III traverse and exert influences on the stability of surrounding rocks of their respective three groups of underground chambers. The design of both layout and structure of the underground powerhouse and other associated underground chambers is constantly being optimized at various stages according to the topographical and geological conditions, layout of the project complex, stability of surrounding rocks in the project area, taking into account the study results obtained in the key projects programs in science and technology put forward by the State in the 9th Five-Year Plan and by State Power Corporation respectively, so that it can comparatively suitable to the actual geological and topographical situations and avoid main geological defects.