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溢洪道最主要的用途是渲泄通过工程的大量洪水、确保大坝安全和避免洪水给上下游造成危害。设计时应尽力满足下述要求並使投资节省:(1)渲泄设计流量的足够长的堰顶;(2)容许的最小压力;(3)容许的最大堰上水头;(4)水力的稳定性和限定的水力特性;(5)结构的稳定性;(6)在容许出流
The main purpose of the spillway is to excrete a large amount of floods through the works, ensure the safety of the dam and prevent floods from causing harm to upstream and downstream. The design shall endeavor to satisfy the following requirements and to save on investment: (1) a sufficiently long weir crevasse for the design flow to be rendered; (2) the minimum allowable pressure; (3) the maximum allowable head weir; (4) hydraulic stability Sexual and defined hydraulic characteristics; (5) Structural stability; (6) Allowable outflow