大春河二级电站引水道滑坡体上渡槽设计

Upper Aqueduct Design for Landslide Mass at Headrace of Dachun River 2nd Cascade Power Station

大春河二级电站1、2号隧洞连接段大部分布置于红河大断裂及滑坡体上,连接段采用箱涵与渡槽相结合的方案,通过断裂带及滑坡地带的渡槽基础均采用排架及桩基础处理。最大限度减小了施工对滑坡体的扰动问题,同时渡槽基础的抗滑桩设置也有效保证了渡槽在滑坡体发生滑动时的稳定性,对于无压引水线路中的滑坡体上过水建筑物的设计有一定的借鉴意义。

The connecting section between 1 # and 2 # tunnels of Dachun River 2nd Cascade Power Station is mostly built on major fracture and landslide mass of the Red River, for which the scheme of combining box culvert and aqueduct is adopted. Bent and pile foundation are applied to aqueduct foundation built at fracture zone and landslide zone, which is able to minimize the interference of construction engineering on landslide mass, In addition, the design of anti-slide pile for aqueduct foundation can effectively maintain the stability of aqueduct when landslide mass slips. Such design may be referred to by discharge structures built on landslide mass in free diversion line.