桥梁桩基础施工振动对周围环境的影响研究

《桥梁桩基础施工振动对周围环境的影响研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、北京交通大学硕士学位论文桥梁桩基础施工振动对周围环境的影响研究姓名：邸亭乐申请学位级别：硕士专业：桥梁与隧道工程指导教师：张楠20080601ABSTRACTABS’I’RAC’I’：ThisdissertationbasedontheLS—DYNAprocedure；simulatedtheprocessofthepunchholespileconstruction；Reappearedtheprocessofthedrivenhammertoattackthegroundwiththenumericalmod

2、el．ThedissertationdiscussedtheLS．DYNAprocedureaboutthekeypointofmodelling，therationaleandmodelorder．Thisdissertationmadeuseofthenoreflectionboundaryconditiontosimulatealimitedfield，thenexpressedthedergroundspaceorthebulkrockmass．Regardingthiskindofquestion，in

3、ordertoavoidinfluenceinducedbythereflectionboundarywave，thenoreflectionboundaryconditioniSusedtothelimitedfieldsurfacetosimulatetheinfinitelygreatspace．TheLS-DYNAanothercharacteristicisthatdefinesthecontactsurfaceandthecontrolfactorsofthecontactsurface．Bydefi

4、ningcontact，itcanbecontrolledthatthedrivenhammerflushingtothegroundandthecorrespondingcontactparameters．Thisdissertationhasservedtheanticipatedanalysispurposewiththehumericalsimulationmodel．Second，itmainlythroughexertsatriangletimeintervalloadontheANSYSmodelt

5、osimulatethefunctionthatproducedbythedrivenhammerattackingtoground，thenitcontrasttheresultwhichproducedbythistriangletimeintervalloadtotheLS—DYNAmodel．Atlastthedissertationcangetrelationshipsbetweentheparametersofthetriangletimeintervalloadandthesoilelasticit

6、ycoefficient，SOitwillprovideabasisforthelatersimilartheory'sanalysis．Third，thisdissertationsummarizedseveralmethodsofaffectedthebuildingbytheactualvibrationwave．Thisdissertationfocusedtheinfluencetothebuildingthatbeinducedbythevibration，itCanmakeuseofthechara

7、cteristicparameterofvibrationofthefoundationsoil(forexample，amplitude，frequency,speedandthevibrationaccelerationofthegroundparticle)todeterminethattherank，thescopeandthesafedistancetothebuilding．Andthisdissertationaslointroducedsomeoverseasstandardsonthecontr

8、ollingofvibrationspeedandtheacceleration．Finally,Thisdissertationdesignatedtherepresentativepileholeastheexperimentalobject，thencarriedonthestandardpunchholespileimpacttest，SOwecanobtaint