过水土石围堰下游冲刷计算及其模型试验  

Scour calculation and model experiments of overflow earth-rock cofferdam

作　　者：左勤思[1] 李云辉[1] 胡志根[1] 冀培民[2] 杨鑫平[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]中国水电顾问集团西北勘测设计研究院,陕西西安710065

出　　处：《武汉大学学报（工学版）》2008年第6期55-58,61,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:50579056);国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(编号:50539120)

摘　　要：针对土石围堰过水时淘刷围堰堰脚和下游河床的问题,基于面流冲刷理论的计算方法,对围堰下游的冲刷及其相关水力指标进行了仿真计算;通过模型试验得到过堰水流冲刷产生的坑深、坑距以及水位、流速等水力参数,比较分析表明计算成果与试验成果吻合较好.同时发现当导流河床的特性和围堰结构型式使过堰水流产生收缩与不均匀分布,仿真计算相关水力指标值会略小于试验值.In light of that the security of cofferdam is controlled by scouring situation, a method for calculating the scour of cofferdam basement and downstream riverbed is proposed based on surface flow scour theory. Comparison of results shows that the calculation results meet with the experiment results well. And it was observed that when the overflow shrunken and unequal distributing by the characteristic of riverbed and the structure of cofferdam, the calculation results are less than the experiment results.

关 键 词：过水土石围堰 堰脚冲刷 围堰稳定判别 

分 类 号：TV641[水利工程—水利水电工程]