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1、宁夏渠道衬砌防冻胀试验研究陆立国1，周玲2，王堂1(1.宁夏水利科学研究所，宁夏银川750021；2.银川市西夏区国土资源水务局，宁夏银川750021)摘要：衬砌渠道冻胀破坏多年来一直影响着宁夏渠道的使用年限和安全运行。本文是在对宁夏灌区多年来渠道衬砌型式及应用效果调查、分析、总结，并借鉴国内研究成果和成功经验的基础上，选取具有代表性的渠道汉渠作为试验段，设计12种不同衬砌结构型式，通过三年的试验观测，取得了大量的试验数据。对不同衬砌型式的防冻胀效果和技术经济指标进行综合分析比较，提出适合宁夏灌区
2、特点、满足渠道安全运行、经济实用、防冻胀效果显著的混凝土板＋土工膜＋苯板＋砂砾石换填等多种衬砌结构型式。其研究成果目前已应用于灌区续建配套和节水改造工程实践中，具有广泛的推广和适用价值。关键词：防冻胀；试验研究；效果分析；衬砌技术中图分类号：TV270文献标识码：BTheNingxiachannelliningsteppreventsfrostbiteswellingtotestresearchLULi-guo1，ZHOULing2，WANGTang1(1.NingXiaInstituteofHy
3、draulicResearch,Yinchuan,Ningxia750021,China;2.TheWaterConservansyofTerritoryResources,XixiaDistrict,Yinchuan,Ningxia750021,China)Abstract:TheliningworkchannelheavedestructionformanyyearshasalwaysbeenaffectingservicetimeandsafeoperationtheNingxiachann
4、el.ThisarticlehasbeenintotheNingxiairrigationareaformanyyearsthecanalliningpatternandtheapplicationeffectinvestigation,theanalysis,thesummary,andthemodeldomesticresearchresultsandinthesuccessexperiencefoundation,theselectionhastherepresentativechannel
5、Handitchtotaketheexperimentalsection,designs12kindofdifferentliningworksstructurespattern,throughthreeyearsexperimentalobservation,hasobtainedthemassivetentativedata.Guardsagainsttheheaveeffectandthetechnologyeconomicindicatortothedifferentliningworkp
6、atterncarriesonthegeneralizedanalysiscomparison,proposedsuitstheNingxiairrigationareacharacteristic,thesatisfiedchannelsafeoperation,theeconomyispractical,guardsagainsttheheaveeffectremarkableconcreteslab+earthlabormembrane+polystyreneboard+Sandandgra
7、veltotradefillsinandsoonthemanykindsofliningworksstructurepattern.Itsresearchresultshasatpresentappliedtotheirrigationareacontinuesconstructsformsacompletesetandsaveswaterinthetransformationprojectpractice,hasthewidespreadpromotionandissuitablethevalu
8、e.Keywords:Guardsagainstheave；Experimentalstudy；Theeffectanalysis；Liningworktechnology宁夏地处季节冻土区，气候寒冷，因冻胀使衬砌工程均有不同程度的破坏，特别是地下水位较高的地区，冻胀破坏尤为严重，致使工程效益不能充分发挥，维修费用也大为增加。为探索灌区渠道衬砌防冻胀应用技术，消减冻胀破坏，延长工程使用寿命，提高工程投资效益，宁夏水科所经过大量的灌区渠道现状调查，结合灌区续建配套，选取具有代表性的渠
