Page 129 - 2023年第54卷第2期
P. 129

[28] 李安国,陈瑞杰,杜应吉,等.渠道冻胀模拟试验及衬砌受力分析[J].防渗技术,2000,6(1):5 - 16.
                [29] 肖,王正中,刘铨鸿,等.考虑冻土双向冻胀与衬砌板冻缩的大型渠道冻胀力学模型[J].农业工程学
                       报,2018,34(8):100 - 108.
                [30] 陈肖柏,刘建坤,刘鸿绪,等.土的冻结作用与地基[M].北京:科学出版社,2006.
                [31] 李安国,李浩,陈清华.渠道基土冻胀预报的研究[J].西北水资源与水工程,1993,4(3):17 - 23.
                [32] 李世萍.解析型弹性地基梁单元构造[D].北京:中国农业大学,2013.
                [33] 李顺群,郑刚.复杂条件下 Winkler地基梁的解析解[J].岩土工程学报,2008,30(6):873 - 879.
                [34] 刘旭东,王正中,闫长城,等.基于数值模拟的 “适变断面” 衬砌渠道抗冻胀机理探讨[J].农业工程学
                       报,2010,26(12):6 - 12.
                [35] 江浩源,王正中,王羿,等.大型弧底梯形 渠 道 “适 缝” 防 冻 胀 机 理 及 应 用 研 究 [J].水 利 学 报,2019,
                      50(8):947 - 959.
                [36] 李宗利,姚希望,李云波,等.冻胀反力系数在渠道衬砌冻胀弹性地基梁模型中的应用[J].农业工程学
                       报,2021,37(17):97 - 106.




                            Elasticfrozensoilfoundationbeam modelfortrapezoidalcanallined
                                         withconcreteprecastslabsincoldregions
                                                                                        4
                                                                                                    5
                                                                       1
                              1
                                                 2,3
                                                             1
                     XIAOMin,WANGZhengzhong ,WULang,CUIHao,YANGXiaosong,GEJianrui
                           (1.CollegeofArchitecturalEngineering,JiangxiS&TNormalUniversity,Nanchang 330013,China;
                    2.AridandColdRegionsWaterEngineeringSafetyResearchCenter,KeyLaboratoryofAgriculturalSoilandWaterEngineering
                          inAridandSemiaridAreasofMinistryofEducation ,NorthwestA&FUniversity,Yangling 712100,China;
                  3.StateKeyLaboratoryofFrozenSoilEngineering,NorthwestInstituteofEco - EnvironmentandResources,CAS,Lanzhou 730000,China;
                           4.CollegeofWaterConservancyandConstructionEngineering,TarimUniversity,Alaer 843300,China;
                          5.CollegeofEnergyandPowerEngineering,LanzhouUniversityofTechnology,Lanzhou 730050,China)
                  Abstract:BasedonWinklerelasticfoundationbeamtheoryandfinitebeamelementmethod,thedeflectiondiffer
                  entialequationforasingleprefabricatedslabisputforwardandsolved.Onthisbasis,consideringinteractionbe
                  tweenfrozensoilandconcreteliningplateandinteractionbetweenprecastslabs ,elasticfrozensoilfoundationbeam
                  modeloftrapezoidalcanallinedwithprecastslabsisproposedthroughintroducingendboundaryconditions ,conti
                  nuityconditionsbetweenslabsandconditionsthatbendingmomentonjointsiszero.Thetangentialgoverningequa
                  tionisderivedfromtangentialstaticequilibriumcondition.Thenanalyticexpressionsforbothnormalandtangential
                  frostheavedisplacementofconcreteliningplatesarepresented.BytakingatrapezoidalcanalinnorthXinjiangas
                  prototype,normalfrostheavedisplacement,tangentialdisplacement,normalstressoncontactinterface,tangential
                  freezingforceanduppersurfacestressofeachsectionofliningplatesarecalculated.Theresultsprovethatthenor
                  malfrostheavedisplacementcalculatedbythepresentedmethodareingoodagreementwithobservedvalueandis
                  betterthanthatcalculatedbyelasticsupportmethodandfinitebeamelementmethod.Thecrackingrangeestimated
                  byanalyzingdistributionofuppersurfacestressofliningplateisbasicallyconsistentwithfieldinvestigation.Dueto
                  discontinuityofliningplates ,distributionofnormalfrostheavedisplacement,stressoncontactinterface,bending
                  momentanduppersurfacestressofconcreteliningplatesallshowsomefluctuations ,andtherearepositiveand
                  negativealternatingphenomena.Thereistangentialdisplacementineachcross - sectionofslopeplateofthecanal
                  causedbypushingforce ,andtangentialdisplacementdecreasesnonlinearlyfromslopetoetothetopofslop,then
                  theminimumisreachedatthetopoftheslopeplate.
                  Keywords:frozensoilengineering; canallinedwithconcreteprecastslabs; frostheave; elasticfoundation
                  beam ;analyticsolution

                                                                                    (责任编辑:韩 昆)







                                                                                                —  2 5 3 —
   124   125   126   127   128   129   130   131   132