摘要
思林水电站溢流表孔堰上水头与单宽泄量两项指标远远超过已建同类工程，而且最大泄洪总水头在百米左右。通过分析比较和模型试验论证，表孔采用X型宽尾墩＋台阶坝面＋戽式消力池联合消能的消能工，适应大流量低佛氏系数泄流消能的特点，利用宽尾墩三元漩滚水跃消能特性，提高了消力池的消能率，缩短了池长，节省了工程量。
Silin hydropower project has surpassed the built projects of the same kind far away on the two indexes of weir head and discharge for unit width of overflowing surface orifices and its largest total head is 100 m high or so. Through analyzing, comparing, and model testing and proving, the combined energy dissipation method of ＂X -shaped flaring pier, dam face bench and flaring-pier stilling basin＂ is adopted on the surface orifice, which adapts to the flood discharging and energy dissipation character of big flow and low Fr current. By making use of ternary -jump energy dissipation character of flaring pier, the energy dissipation ratio of stilling basin can be improved, the basin can be shortened of its length and engineering work load can be reduced.
关键词
思林水电站
泄洪消能
X型宽尾墩
Silin hydropower project
flood discharging and energy dissipation
X -shaped flaring pier
