水力发电2025，Vol.51Issue(4)：25-30,47,7.
考虑帷幕损伤的重力坝稳定性演化规律与应急放空方案研究
Stability Evolution of Gravity Dam Considering Curtain Damage and Emergency Emptying Plan
摘要
Abstract
When the concrete dam encounters extreme loads,structural issues or other emergencies,it is crucial to take appropriate emergency emptying measure to enhance stability and safety.As a vital component of the anti-seepage system of dam foundation,the curtain is susceptible to damage from erosion,aging and seismic blasting,leading to deterioration that adversely affects the stability of the dam.Based on the engineering case of high gravity dam,the stability evolution law and emergency emptying plan are studied considering curtain damage.According to the characteristics of various damage level of curtain,the distribution of seepage field and the evolution of foundation stability under different emptying depth and rate are simulated,and corresponding emergency emptying plans are further proposed.The study finds that when the curtain is severely damaged or fails,the seepage pressure contour lines become notably sparse at the curtain,significantly weakening the seepage prevention effect,and consequently,the anti-sliding stability factor of the gravity dam decreases by 7.8%and 12.7%compared to the initial state respectively,and falls below the standard regulated value.In order to ensure the overall operational safety of the gravity dam,it is necessary to promptly lower the reservoir water level and develop a well-structured emergency emptying plan,providing suggested values for emptying depth to guide relevant emergency operation.关键词
高重力坝/帷幕损伤/应急放空/坝基渗流/抗滑稳定Key words
high gravity dam/curtain damage/emergency emptying/foundation seepage/anti-sliding stability分类
建筑与水利引用本文复制引用
牛瑞琦,林潮宁,郑雪玉,刘晓青,李同春..考虑帷幕损伤的重力坝稳定性演化规律与应急放空方案研究[J].水力发电,2025,51(4):25-30,47,7.基金项目
国家自然科学基金资助项目(52309151) （52309151）
国家重点研发计划项目(2021YFC3090105) （2021YFC3090105）
水利部水库大坝安全重点实验室开放研究基金(YK323007) （YK323007）
中国电建集团科技项目(DJ-HXGG-2022-02) （DJ-HXGG-2022-02）
