加高重力坝长期运行工作性态预测分析--以丹江口大坝为例  

Prediction and analysis of working behavior of heightened gravity dam during long term operation:case of Danjiangkou Dam

作　　者：沈思朝 颉志强[1,2] 祁勇峰[1,2] SHEN Sichao;XIE Zhiqiang;QI Yongfeng(Changjiang River Scientific Research Institute,Changjiang Water Resources Commission,Wuhan 430010,China;Research Center on Water Engineering Safety and Disaster Prevention of the Ministry of Water Resources,Wuhan 430010,China)

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]水利部水工程安全与病害防治工程技术研究中心,湖北武汉430010

出　　处：《水利水电快报》2021年第12期76-81,共6页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金资助项目(51509020);中央级公益性科研院所基本科研业务费项目(CKSF2019394/GC)。

摘　　要：丹江口水利枢纽于1973年建成,是南水北调中线水源工程,为满足调水要求于2005年进行大坝加高。为了分析预测丹江口大坝加高之后在正常蓄水位下长期运行的工作性态,采用三维有限元仿真计算技术,对大坝在正常蓄水位170 m持续运行20 a整个过程中的大坝温度、应力进行了仿真模拟,对大坝工作性态进行了预测分析。结果表明:正常蓄水位下持续运行20 a后,丹江口大坝温度场基本达到稳定状态,内部温度、应力变幅较小。大坝边界温度、应力、坝踵和坝趾竖向应力、结合面开度均受年内温度影响,呈周期性变化。长期运行状态下坝踵坝趾竖向应力变幅无明显增大,结合面工作性态稳定,能够有效传力。Danjiangkou Reservoir built in 1973 is the water source project of the Middle Route Project of South-to North Water Diversion and the dam was heightened in 2005 to meet the water diversion requirement.In order to an⁃alyze and predict the working behavior of Danjiangkou reservoir dam during long-term operation,by employing 3D finite element method,the temperature and stress of the dam under the normal water level of 170m for operation of 20 years were simulated and the working behavior of the dam was predicted and analyzed.The results showed that the temperature field of the dam was basically stable and the variation amplitudes of internal temperature and stress were small.Also,the boundary temperature and stress of the dam,the vertical stress of the heel and toe of the dam,and the opening of the interface were periodically affected by the annual temperature.Under the long term operation condition,the variation amplitudes of the vertical stress at the toe and the heel of the dam would not increase obvi⁃ously.The working behavior of the interface was stable,which could effectively transmit the force.

关 键 词：加高重力坝 工作性态 有限元法 丹江口大坝 南水北调中线工程 

分 类 号：TV698.1[水利工程—水利水电工程]