抗滑微型桩组合结构的计算理论研究

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1、西南交通大学硕士学位论文抗滑微型桩组合结构的计算理论研究姓名：吴文平申请学位级别：硕士专业：岩土工程指导教师：周德培20080601西南交通大学硕士研究生学位论文第1V页据计算模型试验中微型桩上的内力，画出微型桩的弯矩图，从而分析微型桩在滑坡治理中的抗滑机理、荷载的分布形式。(5)结合实际工程，依据理论公式计算抗滑微型桩组合结构的内力，同时验证两种计算方法即线性位移假设法和抛物线位移假设法的可靠性。关键词微型桩；组合结构；抗滑桩：滑坡推力；结构间距；位移假设法：模型试验西南交通大学硕士研究生学位论文第v页Abstrac

2、tMicro-pileisatypeofsmalldiameterboredpileofwhichthediameterisbetween100and300mm．Atfirst．micro．pilesiSconsideredasawholestructuretobearverticalloads．However,inrecent20years，duetothedevelopmentofmicro—piletechnology,theviewsonbearingcapacityofmicro．pilehavebeench

3、anged．Itisgraduallyrealizedthatsinglemicro—pileisalsoabletoresistlateralloads．Itishelpfulforengineerstoapplymicro-pileinsupportingprojects，especiallyinwhichtheconstructionconditionisconstricted．Asaresultoftheadvantagesofapplyingmicro-pile，attentionsarepaidtomicr

4、o．pile．andmicro‘pilesareusedinfoundationpitsupporting，slopecontrollingandreconstructionprojectsafterearthquake．However,thetheoryonmicro．pileappliedinslopeengineeringfallsfarbehindpractice．Inviewoftheresearchsituation，itisanurgenttasktostartresearchesonanti—slidi

5、ngmechanismofmicro—pilecompositestructure．Inthispaper,onthebasisofcollectingresearchdataonmicro．pileathomeandabroad，micro—pileisclassifiedintodifferenttypes．Themicro—pilecompositestructurestudiedinthepaperisonekindofmicro—piles．Theemphasisofthispaperislaidonthea

6、nti·slidingmechanismofmicro—pilecompositestructure．Thedesignmethodofanti·-slidingmicro·-pilecompositestructureisdiscussedbyconsideringbothmodeltestandtheoryresearch．Andaprojectcaseisdesignedonthebasisoftheoriesdiscussedinthisp印er．Bydeepstudiesinthisthesis，follow

7、ingconclusionsaredrawn：(1)collectingdataonapplicationandtheorycalculationofmicro—pileathomeandabroadandclassifyingitintodifferenttypes．Theanti—slidingmechanismofmicro·-pileisanalyzedandthedesignflowchartofmicro—-pilessystemisprovided．(2)thetwokindsofcalculationf

8、ormulasoflandslidethrustispresentedbyconsideringtwodifferentsafetycoefficientdefinition．AnditisconsideredmorereasonablethatthelandslidethrustiScalculatedbydefiningsaf