大型引调水工程典型渠道衬砌失稳成因及防控措施  

Causes of Lining Instability of Large Water Diversion Channel and the Effects of Prevention and Control Measures

作　　者：苏霞 魏凯 郝泽嘉 李少龙[3] 崔皓东[3] SU Xia;WEI Kai;HAO Ze-jia;LI Shao-long;CUI Hao-dong(China South-to-North Water Diversion Middle Route Co.,Ltd.,Beijing 100038,China;Changjiang Institute of Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Changjiang River ScientificResearch Institute,Wuhan 430010,China)

机构地区：[1]中国南水北调集团中线有限公司,北京100038 [2]长江勘测规划设计研究有限责任公司,武汉430010 [3]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《长江科学院院报》2025年第2期188-193,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家重点研发计划项目(2023YFC3209504);中央级公益性科研院所基本科研业务费项目(CKSF2023306/YT)。

摘　　要：大型引调水渠道工程高地下水位挖方段在运行期易发生衬砌失稳,合理设置渗控措施是保障渠道衬砌安全的关键。针对河南省2021年“7·20”特大暴雨后南水北调中线工程某渠段衬砌失稳问题,通过监测资料和三维渗流模拟对渠道衬砌板失稳成因进行了分析,并利用三维模型分析了增设渠坡竖向减压井和横向排水管措施的效果。研究表明:渠基存在的透水地层为降雨入渗和地下水侧向补给提供了渗透通道,极端降雨导致地下水位升高是渠道衬砌板失稳的关键诱因,增设排水措施可有效消减衬砌板下扬压力。研究成果可为类似渠段险情分析和整治及运行管理提供参考。Lining instability is common in excavation sections of large water diversion channels with high groundwater levels during the operation period.Effective seepage control measures are crucial for ensuring channel lining safety.This study addresses the lining instability issue in a canal section of the middle route of the South-to-North Water Diversion Project following the‘7·20’heavy rainstorm in Henan in 2021.Based on monitoring data and three-dimensional seepage simulation,the causes of the canal lining plate instability were analyzed,and the effects of additional vertical relief wells and transverse drainage pipes on the canal slope were evaluated using a three-dimensional model.Results show that the permeable strata in the channel foundation provide a seepage pathway for rainfall infiltration and lateral groundwater recharge.The rise in groundwater level due to extreme rainfall is the primary cause of canal lining plate instability.Drainage measures could effectively reduce the uplift pressure beneath the lining plate.These findings offer insights for the risk analysis,regulation,and operational management of similar canal sections.

关 键 词：引调水挖方渠道 高地下水位 扬压力 衬砌失稳 渗流分析 

分 类 号：TV672[水利工程—水利水电工程] TV223.4