新建云桂铁路丘北南盘江双线持大桥工程地质条件-研究

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1、西南交通大学硕士研究生学位论文第1I页AbstractWiththeincreaseoftheamountofrailwaysbuiltinthemountains，andwiththeexperienceofconstructingbeinggathered，technologybeingmatured，constructingrailwaysover200km／hinthemountainshasalreadybeenimperative．Variousengineeringproblemshavebeenwidelydeveloped

2、inthoseareas，basedontheexperienceofconstructingrailwaysinthesouthwestofChina，suchaslandslide，rockfalls，debrisflows，karstlandformandlandsubsidence，workedoutsection，harmfulgas，highstressedareasandproblemssoils-redclay,rocksalt，expansivesoil(rock)andsoftsoilarealsoverycommon．

3、Eachofthemwouldendangerthesecurityoftherailways，thusbringmuchinconveniencetotheconstructionoftherailways．Soitisverynecessarytodelveintothegeologicalengineeringconditionsfortheconstructionofgrandbridgeforrailwaysinthecanyonfield，especiallywiththedevelopmentoffaults．Thispape

4、rtakestheEngineeringGeologicalconditionsofDouble-trackBridgeontheNanpanRiverofQiubeiforresearchobjectandmakesanappraisementontheengineeringgeologicalconditionsofthebridgethroughfieldinvestigation，collectingandverifiedtheengineeringgeologicaldata，analyzingtheresultinsitutes

5、tandconstructionstatus，andmakesananalysisaboutthemajorengineeringgeologicalproblemsencounteredduringtheinvestigationandconstructionofthebridgewhichCallfallintofourpart：(1)Dependingontfieldinvestigationandlaboratorytestresults，thisthesispointedoutthegeologicalengineeringpro

6、blemslikelytobeencounteredduringthedesigningandconstruction，andcomeupwithcorrespondingcontrolmeasures．(2)Thisthesisanalysesthegeologicalengineeringfeaturesinschemesofdifferentbridgesites，anddemonstratestherationalityofthecurrentschemesofbridgelocation．(3)Thestabilityoftheb

7、ankslope，whichcaninfluencethatofthebridge，hasbeenstudiedbystereographicprojectionandfiniteelementnumericalanaloganalysistechnique，andaseriesofproblemsabouttestthedesignandconstructionwhichshouldbepaidattentionhasbeenpointedout．(4)BasedontheanalyzeofresultofPlateLoadtest，th

8、isthesispointsoutthatthe5撑pier’Snaturalfoundationsuffersaninadequacyofbearingcapacitybeca