摘要
大型水电站的安稳运行是保障我国流域梯级综合开发效益的基础。水库蓄水后的库岸变形和大坝性态稳定性相关,被广泛关注。以典型水电站为例,阐述了库岸变形的监测与防护,从不同维度研析了典型库岸变形问题的主要预测方法。分析表明:离散滑坡体、谷幅变形和库盘变形均属于流-固耦合问题,形成机制复杂;是库水位变化长期作用下的时变结果,且存在联动反应;现阶段主要以原型观测进行现象认知,采用数值模拟进行防控预测。鉴于目前原型观测范围和深度不一,监测方法有待进一步统一规范,预测范围和广度有待进一步拓展;同类工程的共性特征预测时,普适性的预测应用结果宜及时更新,并集成至高坝安全预警管理信息系统中。研究成果旨在为大坝安全监测设计与管理分析提供参考。
The stable operation of large-scale hydropower stations is the basis of guaranteeing the comprehensive development benefits of cascade development in China’s river basin.The reservoir bank deformation problem after storage of water is related to the stability of the dam,which has been widely concerned.With typical hydropower stations,this paper expounds the monitoring and protection of reservoir bank deformation and analyzes the main forecasting methods of typical reservoir bank deformation from different dimensions.The analysis shows that the discrete landslide,valley amplitude deformation and reservoir basin deformation are all fluid-solid coupling problems with complex formation mechanism.Under the long-term effect of reservoir water level change,the time-varying results all have linkage reaction.At present,such problems mainly use prototype observation for phenomenon cognition and numerical calculation for prevention and control prediction.As the current monitoring range and depth are different,monitoring methods need to be further standardized,and the prediction range and depth need to be further improved.When predicting the common characteristics of similar projects,the results of universal prediction should be updated in time and integrated into the high dam safety early warning management information system.The research results can provide reference for dam safety monitoring design and management analysis.
作者
石继忠
Shi Jizhong(Zhejiang Huadong Engineering Consulting Co.,Ltd.,Hangzhou 310014,China)
出处
《山西建筑》
2021年第22期168-171,共4页
Shanxi Architecture
基金
2019年浙江省水利厅重大科技项目--古城墙加固和保护关键技术研究(RA1904)。
关键词
水电站边坡
离散滑坡体
库盘变形
谷幅变形
slope of hydropower station
discrete landslide
reservoir basin deformation
valley amplitude deformation
作者简介
石继忠(1989-),男,硕士,工程师。
