二滩拱坝极限承载力分析  

Analysis of ultimate bearing capacity of Ertan arch dam

作　　者：杨剑[1] 金峰[1] 王进廷[1] 徐艳杰[1] 

机构地区：[1]清华大学水利水电工程系,水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第9期1488-1491,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50539020)

摘　　要：作为小湾拱坝的坝踵开裂及极限承载力研究的一部分,采用有限元方法对二滩拱坝进行了极限承载力分析。首先模拟正常蓄水运行情况,计算的大坝拱冠梁顶点位移与大坝实测位移基本吻合,计算采用的模型和参数是合理的。在此基础上,对二滩拱坝进行了水压超载计算,分析了二滩拱坝正常蓄水阶段的运行状态及极限承载力。分析结果表明:二滩拱坝在正常蓄水工作条件下是安全的,且帷幕的安全裕度有充分保障。The ultimate bearing capacity of the Ertan arch dam was analyzed using finite element method （FEM） as part of the stability evaluation of the Xiaowan arch dam based on comparative studies. Normal water levels were simulated first with the predicted top displacements consistent with measured horizontal displacements. Then, several overloaded hydraulic pressure scenarios the Ertan arch dam were analyzed with four safety factors developed to describe the corresponding working states. The results show that the entire dam and specifically the grouting curtain of the Ertan arch dam are safe.

关 键 词：极限承载力 工程类比 超载 安全系数 

分 类 号：TV31[水利工程—水工结构工程]