路基變形及結(jié)構(gòu)適應(yīng)性研究.pdf

1、圈內(nèi)圖書(shū)分類號(hào)：U2132西南交通大學(xué)研究生碩士學(xué)位論文路基變形及結(jié)構(gòu)適應(yīng)性研究年級(jí)三雯委亙塑一姓名塑睦靖申請(qǐng)學(xué)位級(jí)別王堂亟專業(yè)道墮生迭道王猩指導(dǎo)教師墅延蝰麴撞!j蔓昱2二零零七年六月西南交通大學(xué)碩士研究生學(xué)位論文第11頁(yè)AbstractAsthepassengerspeciallinesstartup，suchasBeijingShanghaihigh—speedrailway、WuhanGuangzhouhighspeedrailw

2、ay、ZhengzhouXi’anhigh—speedrailwayandSOonTheconstructionofhigh—speedballastlesstrackcomestoanewperiodInordertostudyfurtheronthemechanicalresponseandbehaviorandthedesignmethod，theMinistryofRailwaysofChinadecidedtobuildate

3、stsectionoftheballastlesstrackThefulllengthofSuiYumain1ineiS1265kmwhichisthefirsttestsectioninChinaSui(Suining)Yu(Chongqing)testsectionTheinternalstressofsubrailfoundationofhighspeedballastlesstrackiSverycomplexMainlyapp

4、earsintwoaspects：oneistheinstabilityofstrengthfatigueofsubgrade；theotherisinstabilityofdeformationfatigueofsubrailfoundationSothecontrolofdeformationofsubgadebecomesthecoreproblemwhenanalysisthehighspeedballastlesstrackB

5、utintheexitingresearchthecontrolofsubgrademainlyonstrength，andlackofenoughrecognitionThispaperissupportedbythescientificplanningprojectofministryofrailway，thenumberis2005K004一(G)，andthenamebethekeytechnologyinvestigatedb

6、yexperimentalinSuiyuballastlesstracktestsection——thestudyofsubstructureInthispapert11enonlinearfiniteelementsoftwareABAQUSwaSused，whichdevelopedbythecompanyofHKSinAmericaAndbuildedthethree—dimensionalfiniteelementmodelus

7、edtheexitingtrainlOadmodel，mainlyanalyzedtheinfluenceofacceleration、verticaldynamicdisplacement、dynamicstressandrelateddeformationmechanicalresponsesbydifferentspeedofthetrainloadanddesignparametersThedeformationandstruc

8、tureadaptabilityofsubgradewasdiscussedpreliminarilyThecalculationresultindicatethatthevalueofverticaldynamicstressincreaseledtothesurfacelayerofsubgradestiffhess；thevalueofverticalaccelerationandverticaldynamicdisplaceme

9、ntdecrease1edtohesurfacelayerofsubgradestifiness；thebasestiffneSShasacriticalstifinesswas80MPawhenthestifinesswasmorethan80MPa，therangeofvariationofdynamicstressandverticaldynamicdisplacementdecrease，atthesametimevertica

10、laccelerationiSonrapiddescendingtrendAndeachmechanicalresponseshowdisciplinaryfluctuateasthespeedincreaseAtthesametime。apredictionmodelforcumulativepermanentdeformationhasbeenused，andanalyzedthepermanentdeformationofsubg