高混凝土坝蓄水河谷-库坝变形规律

General rules of dam-valley deformation due to reservoir impoundment

本文基于二滩、龙羊峡、李家峡、小湾、锦屏一级、大岗山、溪洛渡、三峡、胡佛(美国)、江垭和铜街子等11座高混凝土坝工程的现场监测数据,研究上下游河谷与库坝受水库蓄水运行引起的变形响应规律。通过综合分析库坝的基本参数、工程水文地质条件以及蓄水后河谷–库坝时空变形的内在关联,重点讨论了库盆沉降与下游河谷竖向变形、谷幅变形以及坝体结构变形的一般性规律。本文研究结果可为相关高坝工程的设计分析与安全监测提供重要参考。

This paper presents an investigation on dam-valley deformation responses to reservoir impoundment by analyzing the field data of 11 high concrete dams,including Ertan,Longyangxia,Lijiaxia,Xiaowan,Jinping I,Dagangshan,Xiluodu,Three Gorges,Hoover(USA),Jiangya and Tongjiezi hydropower projects.We collect and analyze the fundamental design parameters,geological and hydrogeological conditions,and field measurements of dam-valley deformation caused by reservoir impoundment,and reveal several general rules of reservoir settlement and downstream valley vertical movements,valley deformation along horizontal direction,and dam structure displacements.The findings can provide valuable references for the design,analysis,and safety monitoring of high dams.