黏土心墙坝水力劈裂特性试验研究  

Experimental Study on Hydraulic Fracturing Characteristics of Clay Core Dam

作　　者：廖会文 Liao Huiwen(Jiangxi Provincial Water Conservancy&Hydropower Construction Group Limited Company,Nanchang 330000,China)

机构地区：[1]江西省水利水电建设集团有限公司,南昌330000

出　　处：《黑龙江水利科技》2023年第12期5-8,共4页Heilongjiang Hydraulic Science and Technology

摘　　要：为探索适合黏土心墙坝水力劈裂特性试验的通用模式,设计出水力劈裂试验装置,并采取预设裂缝的做法展开试验。考虑到室内试验的局限性,进而通过有限元技术对黏土心墙“拱效应”展开模拟分析。结果表明,完全均质心墙最大干密度和最佳含水率下填料抗水力劈裂性能最强;心墙坝厚度越大,抗水力劈裂性能也越强。引发心墙水力劈裂的主要原因是裂缝、水库快速蓄水及拱效应,故应从这几个方面着手,加强黏土心墙坝稳定性控制。In order to explore a general model suitable for hydraulic fracturing test of clay core dam,a hydraulic fracturing test device is designed and the test is carried out by presetting the crack.Considering the limitation of laboratory test,the"arch effect"of clay core wall is simulated by finite element technique.The results show that the maximum dry density and optimum moisture content of the completely homogeneous core wall have the strongest hydraulic fracturing resistance;the greater the thickness of the core dam,the stronger the resistance to hydraulic fracturing.The main reasons for the hydraulic fracturing of the clay core wall are cracks,rapid reservoir filling,and arching effect,therefore,efforts should be made to enhance stability control of the clay core dam from these aspects.

关 键 词：黏土心墙坝 水力劈裂试验 拱效应 模拟 

分 类 号：TV641.26[水利工程—水利水电工程]