关键词: 堰式进口, 明流设计, 水力计算, 试验验证, 溢洪洞

Abstract:

A spillway structure with an overflow weir at the inlet was adopted for Xiaojiehe Reservoir in Yunnan Province. The open spillway is at the inlet and the discharge chute is a tunnel-type. Because of the special release structure with water head of 79m, the hydraulic characteristics are complicated. By hydraulic calculation on discharge capacity, flow regime and water surface curve and in combination with hydraulic model test verification, the design requirement of the layout, size and structure of the spillway tunnel and the hydraulic characteristics are analyzed. The verification results show that the designed spillway with better flow regime meets the discharge requirements.

Key words: weir inlet, free flow design, hydraulic calculation, test verification, spillway tunnel