土石坝高喷桩防渗墙抗压强度与渗透系数相关性及分布模型研究  

Correlation and Distribution Model between Compressive Strength and Permeability Coefficient for High-pressure Jet Grouting Wall in Earth-rock Dam

作　　者：何金文[1,2] 张诗瑶 胡世燃 潘春玲 HE Jin-wen;ZHANG Shi-yao;HU Shi-ran;PAN Chun-ling(Hubei Key Laboratory of Hydropower Engineering Construction and Management,China Three Gorges University,Yichang 443002,Hubei Province,China;College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,Hubei Province,China;Fujian Research Institute of Water Conservancy and Hydropower,Fuzhou 350001,Hubei Province,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：《中国农村水利水电》2025年第1期193-200,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51909137)。

摘　　要：防渗墙的抗压强度与渗透系数之间的相关性及其分布模型是影响土石坝防渗墙强度及大坝渗透可靠性的关键因素。收集了9座土石坝高喷桩防渗墙检测数据,采用AIC准则识别抗压强度与渗透系数的最优边缘分布类型与构造相关联合分布模型的最优Copula函数,Bootstrap方法模拟识别结果的统计不确定性。结果表明:抗压强度和渗透系数之间存在显著负相关性、主要服从威布尔分布,构造两参数相关非正态联合分布的最优Copula函数为Frank Copula,识别结果差异主要来源于防渗墙施工质量导致的频率分布差异。研究结果可为土石坝高喷桩防渗墙强度可靠度与坝体/坝基渗透稳定可靠度分析提供简单、有效的分布模型。Correlation and distribution model between compressive strength and permeability coefficient of cutoff wall are the key factors affecting the reliability analysis of cutoff wall strength and permeability failure of earth-rock dam.The testing data of high pressure jet grouting wall of 9 earth-rock dams are collected.AIC criterion is used to identify the best marginal distribution type of compressive strength,permeability coefficient and the best Copula function of correlation joint distribution model.The Bootstrap method was used to simulate the statistical uncertainty of the identification results.The results show that there is a significant negative correlation between compressive strength and permeability coefficient,which mainly obeys Weibull distribution.Frank Copula is identified as the best function used to construct the non-normal joint distribution between the two parameters.The identification difference of the best distribution type and best Copula function is mainly due to the different frequency distribution caused by the construction quality of cutoff wall.The research results can provide a simple and effective distribution mode for the reliability analysis of strength reliability of high-pressure Jet cutoff wall and permeability stability of earthrock dam.

关 键 词：土石坝 高喷桩防渗墙 联合分布模型 抗压强度 渗透系数 COPULA 

分 类 号：TV641.2[水利工程—水利水电工程] TV543