摘要
常规封闭抽排式坝后水垫塘结构止水、排水系统较为复杂,运行期需要持续抽排和长期运行维护,成本较高。西南某水电站坝址区天然覆盖层深厚,挖除后形成天然水垫优势,工程首创半封闭无抽排复合式新型水垫塘结构。水垫塘充水后监测数据显示:透水板块基底渗压水位与水垫塘内水位持平,不透水板块基底无渗压作用,水垫塘渗流性态正常;板块与基岩间结构锚杆应力水平较低,存在较大安全储备。综合监测数据分析情况认为水垫塘运行状态良好。
The water stopping and drainage systems of conventional closed pumping-type cushion ponds behind dams are relatively complex,and continuous pumping and long-term operation and maintenance are required during operation,which is costly.The natural cover layer at the dam site of a hydropower station in the southwest is thick,and after excavation,a natural water cushion is formed.The project pioneered a semi-closed,non-pumping,composite,and new cushion pond structure.After the cushion pond was filled with water,the monitoring data showed that the seepage pressure water level at the base of the permeable plate was the same as the water level in the cushion pond,there was no seepage pressure at the base of the impermeable plate,and the seepage properties of the cushion pond were normal;the stress level of the structural anchor between the plate and the bedrock was low,and there was a large safety reserve.According to the comprehensive monitoring data analysis,it is believed that the cushion pond is in good operating condition.
作者
朱宝强
张秋实
马云龙
马志坚
Zhu Baoqiang;Zhang Qiushi;Ma Yunong;Ma Zhijian(PowerChina Guiyang Engineering Co.,Ltd.,Guiyang 550081,Guizhou)
出处
《陕西水利》
2025年第1期1-3,共3页
Shaanxi Water Resources
基金
贵州省科技计划项目(黔科合支撑[2023]一般251)。
关键词
上部封闭
下部透水
水垫塘
监测
渗压
锚杆应力
Upper closed
lower permeable
water cushion pond
monitoring
seepage pressure
anchor stress
