预览加载中,请您耐心等待几秒...
1/2
2/2

在线预览结束,喜欢就下载吧,查找使用更方便

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

大振次列车动荷载作用下桩网加筋路堤土拱效应模型试验研究 Title:ExperimentalStudyontheArchingEffectofPile-reinforcedEmbankmentunderDynamicLoadingofHigh-frequencyTrain Abstract: Withtherapiddevelopmentofhigh-speedrailways,thereisanincreasingneedfortheconstructionofpile-reinforcedembankments.Theseembankmentsplayacrucialroleinprovidingstablesupporttotherailwaytracksandensuringthesafetyandstabilityofthetrains.However,underthedynamicloadingofhigh-frequencytrains,thebehaviorandperformanceofthesepile-reinforcedembankmentsarestillnotwellunderstood. Thisstudyaimstoinvestigatethearchingeffectofpile-reinforcedembankmentsunderthedynamicloadingofahigh-frequencytrainusingamodeltest.Aphysicalmodelofthepile-reinforcedembankmentwascreatedinthelaboratory,simulatingtheactualfieldconditionsascloselyaspossible.Thedynamicloadingconditionofthehigh-frequencytrainwasappliedusingashakingtablesystem. Theexperimentalprogramconsistedoftwomainstages.Inthefirststage,thebehaviorandperformanceofthepile-reinforcedembankmentunderstaticloadingconditionswerestudied.Variousparameterssuchaspilespacing,pilelength,andsoilstiffnesswerevariedtounderstandtheirinfluenceonthearchingeffect.Theresultsshowedthatpilespacinghadasignificanteffectonthearchingeffect,withnarrowerpilespacingleadingtoamorepronouncedarchingeffect.Thelengthofthepileandthestiffnessofthesoilalsoinfluencedthearchingeffectbuttoalesserextent. Inthesecondstageoftheexperiment,thedynamicloadingconditionofthehigh-frequencytrainwasappliedtothepile-reinforcedembankment.Accelerometerswereusedtomeasurethedynamicresponseoftheembankment,andstraingaugeswereusedtomeasurethestraindistributioninthepile.Theresultsshowedthatunderdynamicloading,thearchingeffectwasfurtherenhancedcomparedtostaticloadingconditions.Thedynamicresponseoftheembankmentwasalsoaffectedbythetrainfrequencyandvelocity. Basedontheexperimentalresults,anumericalmodelwasdevelopedtoanalyzeandpredictthebehaviorofpile-reinforcedembankmentsunderdynamicloadingconditions.Themodelwascalibratedandvalidatedusingtheexperimentaldata.Th