三峡大学学报（自然科学版）2025，Vol.47Issue(3)：36-42,7.DOI:10.13393/j.cnki.issn.1672-948X.2025.03.006
堤坝水泥土桩防渗墙渗透系数的概率分布类型研究
Study on Probability Distribution Type for Permeability Coefficient of Soil-Cement Pile Grouting Wall in Levee or Earth-Rock Dam
摘要
Abstract
It's necessary to determine the distribution type for permeability coefficient in the risk assessment and reliability analysis of seepage failure for levee or earth-rock dam.Based on the test data of soil-cement piles in 15 levees and earth-rock dams,K-S test is used to determine distribution type pass or not,the minimum summation of squared errors criterion to identify the best distribution type,and the statistical uncertainty by Bootstrap method for the K-S test and the identification of the best distribution type.The results show that the distribution type with the K-S test is inconsistent with the minimum summation of squared errors criterion in 2 reservoirs.Weibull distribution is identified as the best distribution type for permeability coefficient of soil-cement pile grouting wall in 14 projects,while lognormal distribution only in 1 project.The difference between the cumulative distribution function(CDF)lognormal distribution and Weibull distribution increases with the coefficient of variation,and the maximum difference reaches 0.088 when the coefficient of variation is 0.75.When the truncated normal distribution,lognormal distribution,the truncated extreme value I-type distribution,and Weibull distribution are chosen as the alternative probability distribution types,the dominant and best distribution type of permeability coefficient of soil-cement pile cutoff wall is Weibull distribution.The research results can provide a reference for the permeability reliability calculation of levee or earth-rock dam with soil-cement pile.关键词
堤防/土石坝/水泥土桩/渗透系数/概率分布类型/统计不确定性Key words
levee/earth-rock dam/soil-cement pile/permeability coefficient/distribution type/statistical uncertainty分类
水利科学引用本文复制引用
何金文,张诗瑶,潘春玲,胡世燃..堤坝水泥土桩防渗墙渗透系数的概率分布类型研究[J].三峡大学学报（自然科学版）,2025,47(3):36-42,7.基金项目
国家自然科学基金项目(51909137) （51909137）
福建省水利科技项目(MSK202502,MSK202305) （MSK202502,MSK202305）
