湿陷性黄土区渠道防渗体不均匀沉陷破坏治理技术研究  

Research on the Treatment of Collapse and Destruction of Wetted Loess Channels in Guhai Uplift

作　　者：王绪存 张海军 李建国 许军 高阳 党泽川 WANG Xucun;ZHANG Haijun;LI Jianguo;XU Jun;GAO Yang;DANG Zechuan(Ningxia Hui Autonomous Region Guhai Water Lifting Management Office,Zhongning 755100,China)

机构地区：[1]宁夏回族自治区固海扬水管理处,宁夏中宁755100

出　　处：《人民黄河》2025年第4期127-132,共6页Yellow River

基　　金：宁夏水利科技项目(宁水科信发[2019]5号)。

摘　　要：为解决湿陷性黄土区渠道不均匀沉陷、混凝土衬砌板沉陷滑塌严重、影响渠道安全运行的问题,通过对宁夏固海扩灌十干渠沉陷原因进行分析,对渠道基土进行翻夯,增设土工格栅,增加基土的承载力;采用弧底梯形现浇混凝土断面、铺设复合土工膜和苯板等综合措施对渠道沉陷进行治理。结果表明:渠道基土经过翻夯后密度达到1.78 g/cm~3,孔隙比大幅度减小,密实度增大;采用现浇弧底梯形断面,其结构受力条件好,受到的冻胀力和不均匀沉陷有均匀化的调整;渠道改造治理后的基土含水量、混凝土板的冻胀量和沉降量均得到有效控制。通过对湿陷性黄土区渠道的综合治理,完善了对渠道沉陷及混凝土板滑塌破坏等进行治理的理论设计和方法。In order to solve the issue of uneven subsidence of the channel,serious subsidence and slide of the concrete lining plate in the collapsible loess area,the reasons for subsidence of the No.10 main canal in Guhai extention irrigation in Ningxia were analyzed,and the foundation soil of the channel was ramped,and the bearing capacity of the foundation soil was increased.The channel subsidence is treated by arc bottom trapezoidal concrete section,composite geomembrae and benzene plate.The results show that the density of the channel reaches more than 1.78 g/cm3,the pore ratio of the base soil is greatly reduced,and the density is increased.The castin place arc bottom trapezoid sec-tion has good structural loading condition and uniform adjustment of frost heave force and uneven subsidence.The analysis of the effect after the reconstruction and treatment of the channel shows that the water content of the foundation soil,the frost heaving amount and the settlement amount of the concrete slab has been effectively controlled.Through the comprehensive treatment of collapsible channels,the theoretical design and methods for the treatment of collapsible channels and the collapse of concrete slabs are improved.

关 键 词：湿陷性黄土 渠道 沉陷破坏 混凝土板滑塌 预防措施 

分 类 号：TV698.232[水利工程—水利水电工程] P642[天文地球—工程地质学]