摘要
混凝土面板堆石坝的面板是防渗的主要措施,但是由于蓄水,在水压力作用下,面板的拉应力经常超过抗拉强度,产生破坏,影响防渗效果。首先研究了面板堆石坝在国内的工程应用情况,分析了面板拉应力出险原因。在此基础上,建立了面板堆石坝的三维数值模型,设计了竣工期、蓄水期和不同面板形式等计算工况。根据计算结果分析了其应力应变情况,研究发现:拱形面板的抗压强度提高,拉应力减小,受力状态相对于直线型面板改善较大。
Face of concrete face rockfill dam is the main anti-seepage measure of the dam.Anti-seepage effect is lowered for local failure of face concrete because of tensile stress large than tensile strength in face.So cause of tensile stress in face is analyzed.Furthermore,the engineering application cases of concrete face rockfill dam in china are studied based on these,three dimensional numerical model of concrete face rockfill dam is set up.The computing schemes of completion period,storage period and different types of concrete face are designed.According to the numerical calculation results,their stress and strain in face are studied.Found that compressive strength in face increases,tensile stress in face decreases and the force situation of arch one is improved that of linear face.
出处
《中国农村水利水电》
北大核心
2010年第8期113-117,119,共6页
China Rural Water and Hydropower
关键词
混凝土面板堆石坝
拱形面板
抗压强度
拉应力
concrete face rockfill dam
arch face
compressive strength
tensile stress
