某特高堆石坝溃决过程及下游梯级水库群风险防控研究  

Study on Failure Process of a Rockfill Dam with Extra Height and Risk Control of Cascade Reservoir Group Downstream

作　　者：唐荣婕 何成荣 石雨亮 陈含墨 TANG Rongjie;HE Chengrong;SHI Yuliang;CHEN Hanmo(Power China Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南省昆明市650051

出　　处：《水电与抽水蓄能》2024年第4期26-32,共7页Hydropower and Pumped Storage

基　　金：国家自然科学基金黄河自然科学基金黄河水科学研究联合基金项目“黄河上游水资源演变对水光风储多能互补影响”(U2243232);中国电力建设股份有限公司科技项目“水风光储基地一体化运行关键技术研究”(DJ-ZDXM-2022-10);中国电力建设股份有限公司核心攻关技术项目“新时期云南水资源配置与水网构建关键技术研究与应用”(DJ-HXGG-2021-04);云南省科技厅重点研发计划“云南省水网空间规划与智慧水网关键技术研究”(202203AA080010)。

摘　　要：水库大坝是重要的基础设施,其运行安全事关人民生命财产安全和社会稳定。应用DB-IWHR模型模拟某特高堆石坝因超标准洪水、泄洪建筑物失控、安全事件等原因导致坝体溃决的洪水过程。利用HEC-RAS软件模拟安全事件情景下的溃坝洪水演进,并对比分析通过预警提前降低水位与否对下游水库群受溃坝洪水影响程度的差异。研究结果表明,降低水位能够显著减小溃坝洪峰洪量,梯级水库群可通过预警腾库、减小蓄水量,有效削弱、截断上游溃坝风险的传导;水库调节性能、坝体抗风险能力等是梯级水库群布置应予考虑的重要因素。Safe operation of reservoir dams is crucial for the safety of people's lives and property and social stability.The DB-IWHR model is used to simulate the flood process of a special high rockfill dam break due to flood exceeding the designed level,failure of spillway structures,safety incidents,etc.Evolution of dam break flood due to safety incidents is simulated using HEC-RAS software,and impact of lower water level with advance risk warning is analyzed.The research results show that lower water level is conducive to reducing the flood peak and volume of the dam failure,and the cascade reservoir group can effectively weaken and block the upstream dam failure risk by releasing water from the reservoir in advance.The reservoir regulation performance,dam body resistance to risk,etc.are important factors to be considered in the cascade reservoir group layout aimed at reducing the systemic risk of the river basin.

关 键 词：特高坝 溃坝 梯级水库群 数值模拟 风险防控 

分 类 号：TV122.4[水利工程—水文学及水资源]