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GAO Xing- zhong, ZHAO Feng and PENG Wei
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高兴中, 赵锋, 彭维
Abstract: In accordance with the experimental results, the contraction angles of the abutment walls on both side of side upper outlet are increased from 8°to 11.314°, and the end of the abutment wall is extended 3 m. The top elevation of the end of abutment walls is increased from160 mto 165 m. Thus, it is basically not to change the original design type, and the nappe is basically not to scour the slopes.
摘要: 1999 年江垭大坝三中孔首次泄洪发现, 在216 m 库水位, 水舌出挑坎后, 向二侧扩散, 部分水体落到岸坡, 引起局部冲刷。根据泄洪调度的要求, 在库水位216 m 以上, 仍存在中孔单孔单独泄流工况, 而随库水位升高, 水流扩散落入岸坡的范围可能增大。为了大坝安全泄洪, 有必要进行局部体型优化, 避免大坝下泄水流因扩散过度造成对岸坡的冲刷。另外,根据1998 年洪水条件及新的城市防洪标准, 经有关部门批准, 江垭水利枢纽将大坝抬高3 m。虽然泄洪建筑物体型不作较大修改, 但泄洪调度方式需根据抬高水
高兴中, 赵锋, 彭维. 江垭大坝水工模型水力学试验研究[J]. .
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