低弹模混凝土防渗墙材料参数统计特性及相关分布模型  

Statistics Characteristics and Correlation Distribution Model of Material Parameters of Low Elastic Modulus Concrete Cut-off Wall

作　　者：何金文[1,2] 贾舒 潘春玲 陈朝 张诗瑶 HE Jin-wen;JIA Shu;PAN Chun-ling;CHEN Zhao;ZHANG Shi-yao(Hubei Key Laboratory of Hydropower Engineering Construction and Management,China Three Gorges University,Yichang 443002,China;College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China;Fujian Research Institute of Water Conservancy and Hydropower,Fuzhou 350001,China)

机构地区：[1]三峡大学水电工程施工与管理湖北省重点实验室,湖北宜昌443002 [2]三峡大学水利与环境学院,湖北宜昌443002 [3]福建省水利水电科学研究院,福建福州350001

出　　处：《水电能源科学》2024年第2期104-107,156,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51909137);长江科学院开放基金项目(CKWV2019755/KY)。

摘　　要：为获取低弹模混凝土防渗墙渗透系数、弹模和抗压强度3个材料参数的统计特性及相关分布模型,基于2座土石坝的检测数据,根据赤池信息准则(AIC)识别材料参数的最优分布类型及相关分布模型的最优Copula函数、Bootstrap方法模拟识别结果的统计不确定性。结果表明,抗压强度、渗透系数和弹模分别服从极值Ⅰ型、对数正态、威布尔或极值Ⅰ型分布,变异系数均值分别为0.17、0.40、0.11;抗压强度与渗透系数、弹模与抗压强度、弹模与渗透系数之间的Pearson相关系数均值分别为-0.79、0.67、-0.55,最优Copula函数分别为Plackett Copula、Gaussian Copula、Gaussian Copula。研究结果可为低弹模混凝土防渗墙的渗流和强度可靠度计算提供参考。In order to obtain the statistics characteristics and correlation distribution models of permeability coefficient,elastic modulus(E-modulus)and compressive strength of concrete cutoff wall with low E-modulus,based on the test data of 2 earth-rockfill dams,AIC method was used to identify the optimum distribution of material parameters and best Copula functions for correlation distribution model.The statistical uncertainty was simulated by Bootstrap method.The results show that compressive strength,permeability coefficient and elastic modulus obey Extreme type I distribution,Lognormal distribution and Weibull distribution or Extreme type I distribution,respectively,with coefficient of variation being 0.17,0.40 and 0.11.The average Pearson coefficient of correlation between compressive strength and permeability coefficient,E-modulus and compressive strength,E-modulus and permeability coefficient are-0.79,0.67 and-0.55,and the best Copula are Plackett Copula,Gaussian Copula and Gaussian Copula,respectively.The results can provide reference for seepage and strength reliability calculation of low E-modulus concrete cutoff wall.

关 键 词：低弹模混凝土 材料参数 统计特性 相关分布 抗压强度 渗透系数 弹模 

分 类 号：TV223.42[水利工程—水工结构工程] TV543