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1、學號：常州大學畢業(yè)設(shè)計（論文）（2013屆）題目砂性土與水泥漿體剪切特性試驗研究學生王瑩學院懷德學院專業(yè)班級土木091校內(nèi)指導教師夏雄專業(yè)技術(shù)職務副教授校外指導老師蔡云專業(yè)技術(shù)職務總工程師二○一三年六月砂性土與水泥漿體剪切特性試驗研究摘要：樁基礎(chǔ)是一種重要的基礎(chǔ)形式，在鐵路、公路、橋梁、港口碼頭、高層建筑等工程中應用十分廣泛。樁-土接觸面力學特性的研究是解決樁-土相互作用問題的前提,尤其對于摩擦型樁而言,樁-土接觸面問題直接影響到樁基的承載力。本文針對常州土層特點，考慮樁體壓入砂土的力學特性，開展了三種不同水灰比和密實度的砂土與混凝土樁接觸面室內(nèi)單剪試驗，每組試驗考慮5個法
2、向應力。試驗結(jié)果表明，砂土與樁接觸面的力學行為隨砂土的密實度和水灰比呈現(xiàn)明顯相關(guān)性。在砂土密實度一定時，接觸面的抗剪強度，摩擦角、隨混凝土試樣水灰比的增大非線性單調(diào)減小，粘聚力單調(diào)減大。在水灰比一定時，接觸面的抗剪強度，摩擦角、隨砂土密實度的增大非線性單調(diào)增大，粘聚力單調(diào)減小。法向應力較小時密實度對接觸面應力應變曲線的初始段影響不大。試驗結(jié)果可供相關(guān)工程數(shù)值分析參考。關(guān)鍵詞：接觸面；剪切特性；試驗研究；砂土；水泥漿Studyofshearpropertiesofsand-cementslurryinterfacebyshearexperimentalstudyAbstrac
3、t：Thepileisallimportantfoundationform，anditisextensivelyusedinrailways，roads，bridges，portsandhigh一risebuildings．Theinterfacemechanicalpropertiesbetweenpileandsoilaretheprerequisiteforthepile-soilinteractionproblem.AccordingtothepropertiesofChangzhouregion,consideringthemechanicalproperties
4、ofbodyispressedintothesand,experimentsbyusinglaboratorysheartestsareperformedonsandconcreteinterfaceswiththreekindsofsanddensity，wherefivenormalstressesaretakenintoaccountineachsanddensityinthispaper.Theexperimentaldatashowthatdensityofsandandwatercementratioplayanimportantroleinmechanismb
5、ehaviorofpile—soilinterface．Whiledensityofsandisfixed，,withhigherwatercementratio,shearingstrength,frictionangleoftheinterfacealldecreasemonotonouslyandnonlinearly,butcohesionforceoftheinterfaceincrease．Whilewatercementratioisfixed，withhigherdensityofsand,shearingstrength,frictionangleofth
6、einterfacealldecreasemonotonouslyandnonlinearly,butcohesionforceoftheinterfaceincrease．Theinitialpieceofstress—straincurveofinterfabeisnotsensitivetodensityofsand.ThisexperimentaIresultsputthegoodfoundationforrelativeengineeringnumericalsimulation．Keywords：interface,shearproperties,experim
7、entalstudy,sand,cementslurry,VI摘要····································································Ⅰ目次····································································II1緒論···································································11.1接觸面特性·······
