工程科学与技术2018，Vol.50Issue(2)：60-66,7.DOI:10.15961/j.jsuese.201700828
土石坝溃坝参数模型研究
Parametric Model for Breaching Analysis of Earth-rock Dam
摘要
Abstract
After collecting and analyzing the data of existing dam failure cases summarized in foreign references,as well as extra cases in China,a basic database containing 154 dam breaching cases with detailed information is constructed.Taking dam type,reservoir shape coefficient, ratio of water level to breach depth and dam height,which are all expressed in dimensionless forms,as independent variables into account,the regression analysis is adopted to establish dimensionless formulas for calculating peak outflow discharge,final average breach width and failure time.The new empirical model considers the influences of dam type,failure type,storage capacity,water level,dam height and breach depth.Comparing to the existing models for dam breaching parameters,the present model has the advantage of using larger database,easier acquisition of input variables,and including more influence factors of dam breaching parameters,in particular,the dam characteristics and current hydraulic conditions.Then,for all the dam breach cases collected in the database,the calculation using different models is carried out.The result shows that the present model has better adaptability and prediction accuracy based on the statistics of overall computing error,the value of root-mean-squared error and coefficient of determination,by comparing to the previous models.Furthermore,four typical breach cases of different dam types and fail-ure types are selected to verify the rationality and superiority of the present model,and the calculation results of present model are more accurate in most of the cases than those of the other models.关键词
土石坝/溃坝数据库/溃坝参数模型/模型对比Key words
earth-rock dam/database of dam breach/parametric model for dam breaching/model comparison分类
建筑与水利引用本文复制引用
梅世昂,陈生水,钟启明,阎志坤..土石坝溃坝参数模型研究[J].工程科学与技术,2018,50(2):60-66,7.基金项目
国家重点研发计划基金资助项目(2017YFC0404805) （2017YFC0404805）
国家自然科学基金资助项目(51379129) （51379129）
