大型输水渠道渗透破坏问题分析  

Summary on seepage failure problem of large-scale water conveyance canals

作　　者：周嵩 熊焰 倪锦初 ZHOU Song;XIONG Yan;NI Jingchu(Changjiang Survey,Planning,Design and Research Co.,Ltd,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司

出　　处：《人民长江》2019年第12期152-156,共5页Yangtze River

基　　金：国家重点研发计划项目(2017YFC0405001)

摘　　要：基于南水北调中线工程大量渗透破坏问题的调研成果,从特征和表象上将大型渠道的主要渗透破坏现象归结为管涌型、流土型、集中渗漏型、散浸型、顶托型5种主要型式。结合大型输水渠道的相关特点,系统总结与分析了各种渗透破坏模式的成因、易发部位、特点及诱因。结合南水北调中线一期输水工程干渠典型渠道断面渗流计算成果,分析了堤身渗透破坏的可能性。分析表明,正确判断渗透破坏是否发生要综合考虑渗流部位、渗流方向、渗透介质、渗流场分布等因素。Based on the investigation on seepage failure problems in the Middle Route Project of South-to-North Water Diversion,the main types of seepage failure phenomena of large conveyance canals were summarized as 5 main modes on the basis of the characteristics and appearance,namely the piping failure,soil flow,concentrated leakage,scattered leaching and lifting.Combined with the characteristics of large-scale water conveyance canals,the causes,prone sites,characteristics and incentives of 5 seepage failure types were analyzed in detail.Combined with the results of seepage calculation of a typical section of the Main canal of first-stage Middle Route Project of South-to-North Water Diversion,the possibility of seepage failure of the embankment was analyzed.The analysis concludes that it is necessary to comprehensively consider the factors such as seepage location,seepage direction,seepage medium,and seepage field characteristics when the possibility of seepage failures is analyzed.

关 键 词：渗透破坏 输水渠道 管涌破坏 流土 南水北调中线工程 

分 类 号：TV672[水利工程—水利水电工程]