水力发电学报2017，Vol.36Issue(12)：87-94,8.DOI:10.11660/slfdxb.20171210
高拱坝坝踵应力实测与计算的比较研究
Determination of high arch dam heel stress: A comparison between monitoring and calculating methods
周建平 1杜小凯 2张礼兵 3周秋景4
作者信息
- 1. 中国电力建设集团有限公司,北京100048
- 2. 水电水利规划设计总院,北京100120
- 3. 中国电建昆明勘测设计研究院有限公司,昆明650041
- 4. 中国水利水电科学研究院,北京100038
- 折叠
摘要
Abstract
The stress state at high arch dam heel is an important index for evaluating dam safety,but its variation and influencing factors are complicated due to its statically indeterminate structure,concrete placement during dam construction,changes in water level during reservoir operation,and changes in the intemal and extemal temperature of the dam.To determine the dam heel stress,in-situ monitoring and numerical analysis are two main methods,but they often produce significantly different results.This paper discusses the difference between these two methods in dam heel stress evaluation.For in-situ monitoring,through the analysis of the working principle of the compressive stress meter and strain gauge,we suggest the evaluation of effective stress at dam heel,and an improvement on the arrangement of osmometers,compressive stress meters and strain gauges.For numerical analysis,we examine the relationship of dam heel equivalent stress versus mesh size along dam thickness,and give suggestions for effective mesh partition in calculation of dam heel stress.Results show that although both methods have their own influencing factors,the improved monitoring method combined with the numerical calculation of high accuracy can give a satisfactory evaluation of dam heel stress.关键词
高拱坝/坝踵应力/安全监测/数值分析/等效应力Key words
high arch dam/dam heel stress/in-situ monitoring/numerical analysis/equivalent stress分类
建筑与水利引用本文复制引用
周建平,杜小凯,张礼兵,周秋景..高拱坝坝踵应力实测与计算的比较研究[J].水力发电学报,2017,36(12):87-94,8.
