【摘要】 茨坪水电站厂区地质构造较为复杂，形成该区域的不稳定边坡，前池工程不得不由边坡明挖改为洞式前池。并在前池内选用曲线形布置的实用堰设计方案，达到了在不增加洞室跨度的前提下加大了堰的泄流能力，满足了机组弃荷溢流时引水隧洞保持明流的设计要求。更多还原

【Abstract】 The geologic structure at Ciping Hydropower house zone is rather complicated and unstableslope has been shaped in the zone.Therefore, the fore bay of the station has to change its shape fromopen excavation to tunnelled excavation and the spocific shaped vacuum weir is selected.The curveshape was selected in the plan layout of weir, so that the overflow capacity increases, whereas the ex-cavation span does not increase and the flow with a free surface in diversion tunnel is achieved duringload shedding of unit occur.更多还原