加鋪碎石過渡層減少路面反射裂縫研究.pdf

1、山東大學碩士學位論文加鋪碎石過渡層減少路面反射裂縫研究姓名：楊尚陽申請學位級別：碩士專業(yè)：固體力學指導教師：劉敏20060501山東大學碩士學位論文AbstractWiththerapiddevelopmentofoureconomythehighgradepavementmileagehasbeingincreasingTheasphitpavementhasbeenwidelyusedinmadconstructionbecause

2、ofthegoodleveling，acal“beingsteadycomfortandlownoise11地semi—rigidbasecoursehasalsobeenwidelyusedasthepavementbaseandsubbaseintheItigllgradepavementconstructionbecauseofthemorepowerfulstrength，beRerstabilityandhighrigityN

3、owdays，thesemi—rigidbasecoursehasbecomethemainformintheconstructionofthebackbonelinesoftheNationalhighwaysEvensomelowgradepavementsalsousethesemirigidbasematerialasthebaseHoweverthesemi—rigidbaseCanhaveeasilyrapturebymuc

4、hdrynessandlowtemperatureSothroughreduplicatevehicleload，theseinteriorfractureswillextendtoexteriorasphalttobetheReflectiveCracking111eresultisthatthewholeusagequalityhasbeenbrokenandmoreseriouslytherainwatercallfilterto

5、thesubgradethoughthecrackThereforweakenedtheroadbedstabilityhasbeenweakenedandcausetheroadhasbeenbrokenearlierHereIusetheFEMcalculationsoftwaretocalculatepavementstructure塒thfullgradegravellyinterlayerbychangingthecoeffi

6、cientofthermalshrinkageandthemodulusofthematerialThoughthatweCallanalyzestressamongbottomofsB_rfaeeasphaltlayerandtopofsemirigidbaseUndereverykindofdisadvantageoustemperaturefielddiscussthethermalstressdistributioninthes

7、tructureAtthesametimewecanobservehowthegradedgravelcanreducethereflectivecrackingsimultaneity，combiningwithfiniteelementmethod，fracturemechanicshasbeenanimportantwaytosolvecrackprobleminroadfieldatpresentForreflectivecra

8、ckunderthermalload，newconclusionCanbegainedifwetakestresssingularityatcracktipintoaccountItCanbeprovedthattheconclusionwegetisclosetothefactofroadabruptionTherefor，itisveryimportanttostudythegrowinglawofasphaltpavementus