摘要
锦屏一级拱坝坝高305 m,运用有限元仿真分析方法模拟了锦屏一级特高拱坝自第一仓混凝土浇筑至蓄水运行全过程,基于监测资料对后期发热温升、坝体与基础弹性模量等主要热力学参数进行了反演分析,并对下一阶段蓄水的工作性态进行了预测。计算结果表明,锦屏一级拱坝后期发热温升约为5~6℃,短期蓄水过程中混凝土和地基弹性模量约为设计初始值的1.65倍左右。在水位上升至1 880 m时,径向最大变形出现在1 730.0 m高程的PL13-4监测点。预测值与监测值吻合较好,证明仿真分析成果能基本反映大坝实际工作性态,分析结果也为其他特高拱坝的设计提供了参考。
The arch dam of Jinping Ⅰ Hydropower Station is 305 m high. The full construction process of the dam from the beginning of the concrete placement to the impounding and operation is simulated with the method of the finite element simulation analysis,and then the inversion analyses on the main thermodynamics parameters,such as the late heat-generation and temperature rise,dam body and its foundation elastic modules,etc.,are made,while the working behavior of the next impounding stage is predicted as well. The calculation result shows that the late heat-generation and temperature rise of the dam is about 5～6 ℃ and the elastic modules of concrete and foundation are about 1. 65 times of the initial design values. When the water level reaches up to El. 1 880 m,the radial deformation occurs at the location of El. 1 730. 0 m of PL13- 4 monitoring point. Basically,the predicted values better coincide with the monitored ones,thus it is demonstrated that the actual working behavior can be generally reflected by the results from the simulation analysis,moreover,the analysis results can provide references for the design of the other super-high arch dam concerned as well.
出处
《水利水电技术》
CSCD
北大核心
2017年第1期46-51,共6页
Water Resources and Hydropower Engineering
基金
国家重点研发计划项目(2016YFB0201000)
国家科技支撑计划课题(2013BAB06B01)
中国水科院科研专项(SS0145B392016)
流域水循环模拟与调控国家重点实验室基金项目(2016ZY10)
关键词
工作性态仿真
特高拱坝
有限元
仿真分析
变形预测
反演分析
锦屏一级水电站
simulation of working behavior
super-high arch dam
finite element
simulation analysis
deformation predicition
inversion analysis
Jinping Ⅰ Hydropower Station
