摘要
坝基防渗是影响超深覆盖层上高面板坝建设的关键技术问题之一。笔者以建于93m深覆盖层上165m高的某面板坝为例,基于河海统一广义塑性模型和参数,采用三维有限元法对坝基混凝土防渗墙-连接板-趾板的防渗方案进行弹塑性应力变形数值计算,并将计算结果与现场实测结果进行对比分析。结果表明,大坝防渗结构的变形与应力均在安全范围内,防渗结构设计方案可行;计算值与实测值两者变化规律基本一致且量值吻合较好,说明大坝计算预测精度较高。研究结果可为同类面板堆石坝的设计和建设提供参考。
The anti-seepage of dam foundation is one of the key technical problems affecting the construction of high concrete face rockfill dams on ultra-deep overburden.Based on the Hohai unified generalized plastic model and parameters the three-dimensional finite element method is used to calculate the elastic-plastic stress and deformation of the anti-seepage scheme of the concrete cutoff wall-connecting plate-toe plate of the dam foundation by taking a face rockfill dam with a height of 165 m built on a 93 m deep overburden as an example.The calculation results are compared with the field measurement results.The results show that the deformation and stress of the dam anti-seepage structure are within the safe range and the design scheme of the anti-seepage structure is feasible The calculated values are basically consistent with the measured values and the values are in good agreement indicating that the calculation and prediction accuracy of the dam is high.The research results can provide reference for the design and construction of similar concrete face rockfill dams.
作者
王旭峰
周芳
王文康
钟春欣
韩朝军
朱晟
WANG Xufeng;ZHOU Fang;WANG Wenkang;ZHONG Chunxin;HAN Chaojun;ZHU Sheng(Shandong Electric Power Engineering Consulting Institute Corp.Ltd.,Jinan 250013 China;Hohai University,Nanjing 210024 China)
出处
《红水河》
2024年第6期5-10,共6页
关键词
面板堆石坝
深覆盖层
防渗结构
三维有限元
变形
应力
face rockfill dam deep overburden
cutoff structure
three-dimensional finite element
deformation stress
