摘要
为保证丹江口水利枢纽左岸加高土石坝的正常运行,根据GB 18306-2015《中国地震动参数区划图》,对土石坝工作安全性态和抗震安全性进行复核。充分考虑了左岸加高土石坝结构特点,结合两次170 m高水位运行监测资料,对左岸土石坝在蓄水运行期变形和渗流变化规律进行分析;采用有限元方法,重点研究了左岸土石坝在遭遇设计地震动情况下的抗震安全性。结果表明:①土石坝和混凝土坝结合部位置沉降变形(108.78 mm)最大,坝体沉降变形变化速率减缓,渐趋稳定;②心墙内渗压水位随库水位平稳变化,整体渗流性态稳定,左岸土石坝运行工作性态正常;③坝体地震动力响应规律正常,抗震安全性能良好,满足相关规程规范要求。研究成果可为该工程安全运行评价提供技术支撑,并为其他类似工程提供参考。
To ensure the normal operation of the left bank elevated earth-rock dam, the safety status and seismic safety of the earth-rock dam work were reviewed according to the GB 18306-2015 Seismic Parameter Zoning Map of China.The structural characteristics of the left bank elevated earth-rock dam were fully considered, and the deformation and seepage changes of the left bank earth-rock dam during the water storage operation period was analyzed based on two monitoring data of 170 m high water level operation.The finite element method was used to study the seismic safety of the left bank earth-rock dam under design seismic conditions.The research results indicated that:(1) The settlement deformation(108.78 mm) at the junction of the earth-rock dam and the concrete dam was the largest, and the settlement deformation rate of the dam body slowed down and gradually stabilized.(2) The seepage pressure water level in the core wall changed smoothly with the reservoir water level, and the overall seepage flow state was stable.The operating working condition of the left bank earth-rock dam was normal.(3) The seismic dynamic response law of the dam body was normal.The seismic safety performance was good and met the requirements of relevant regulations and specifications.The research results can provide a technical support for the operation evaluation of the earth-rock dam of this project and provide a references for other similar projects.
作者
梅润雨
周荣
魏匡民
MEI Runyu;ZHOU Rong;WEI Kuangmin(Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430014,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan 430014,China;South to North Water Transfer Middle Route Water Source Co.,Ld.,Danjianghou 442700,China;Geotechnical Engineering Research Institute,Nanjing Institute of Water Resources Science,Nanjing 210024,China)
出处
《水利水电快报》
2025年第2期61-67,共7页
Express Water Resources & Hydropower Information
基金
长江设计集团自主创新项目“水库大坝震后安全检查技术研究”(2022WBBZ003)
长三角区域中部水资源配置工程方案研究(CX2021Z10-1)。
关键词
丹江口水利枢纽
加高土石坝
安全性态
抗震安全性
Danjiangkou Water Control Project
elevated earth-rock dam
safety state
seismic safety
