高速鐵路富水黃土隧道激振試驗研究分析.pdf

1、西南交通大學碩士學位論文高速鐵路富水黃土隧道激振試驗研究分析姓名：陳沖申請學位級別：碩士專業(yè)：巖土工程指導教師：馬建林20100601西南交通大學碩士研究生學位論文第1I頁AbstractTheconstructionofbigcrosssectionwaterrichloesstunnelinrailroadpassengel“transportationspecial1inewasstillforthefirsttimeindome

2、sticandforeigntherewillbemoreandmoreresemblingprojectsinthewaterrichloessareawiththeinfrastructureconstructionanddevelopmentofwesternregionofourcountryTheoldloessLocatedatsaturatedloesstunnel’Sbasis，underpresentsubterran

3、eanbottomstrengtheningworksmeasure，whethernottobeargillitizationorsoftening，satisfiesthesubsidencerequest，guaranteesline’ssecurity，thestabilityandsmoothnessonhighspeedtrainsmovingloadsvibration—excitingtestisthemostdirec

4、tefficientandreliableProoftechniqueInthispaper，vibration—excitingtestiscarriedonthetunnellocatedinMianchitoLingbaosectionofZhengxirailroadpassengertransportationspeciallinenamedZhangmaoSimulateddynamicloadsoftrainontunne

5、lrailbaseplate，verticalvibrationspeedandsoilpressurefromTunnelrailbaseplatetopsurfaceto3metersbelOWtheInvertaremasured，soilpressureandwaterpressurealonetheinvent，thestressinsidetheconcretefilledinInvertarealsobemasured，d

6、istributionandVariationofvibrationvelocitysoilpressure，waterpressure，dynamicstressinDifferentvibrationfrequencyarefinedThroughtheanalysisandcomparisonofthevibrationVelocity，thedynamicsoundingandthegradingcurvebeforeandaf

7、terthevibration—excitingtest，consideringtheaccumulationsubsidence205mm，thestabilityandlong—termsecuritythetunnelindynamicloadingbeverifiedWhendynamicpressureisabout30kPauponthebaseplatetop，themaximumdynamicstrainofconcre

8、tefilledis1ps，farlessthanconcretecrackedstrain；Convertedtothebiggestdynamicstressis30kPaO2％oftheC30concretecompressivestrengthdesignvalue；ThethicknessofpackingconcretedefinitelymayoptimizeThroughfiniteelementmethod，takes

9、hakingspeedastheindexstudying，analysethestabilityofwaterrichloessconsolidatingtwokindsconditionwithbottom1oessinhavingthejettingconcreteornotgottheconclusionthatthe20cmjettingconcreteunderInvertshoudbeoptimizeKeywords：wa