管道沟槽边坡稳定性研究

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1、西南交通大学硕士学位论文管道沟槽边坡稳定性研究姓名：徐桂弘申请学位级别：硕士专业：市政工程指导教师：陈春光20070501西南交通大学硕士研究生学位论文第1l页AbstractThecitypipelineengineeringconsistsoffeedwaterpipe，rainwaterpipeandsewagepipe,isapartandparcelofthemunicipalengineering．Firstofall，pipelineengineeringneedsexcavatingtrenchdurin

2、gpipelineconstruction，whichproduceinteriorstressredistributionandinteriordistortioninslope，addingnaturalenvironmentandartificialinfluence，ascausethedebaseingoftrenchstabilization．Inaddition,inordertoreduceconstructioncost,quickenrateofprogress，theconstructioncorp

3、orationandcityadministrativedepartmentoftenneglectdisastroushazard．However,atpresent,theproblemoftrenchwallslopestabilizationwasrarelystudied．Basedonthemodelexaminationandtheoreticalanalysis，theslopestabilizationandsupportingsystemarestudiedinthispaper．Tryingtoac

4、quiretrenchslopefailurelawindifferentconditions，andprovidetheoreticalfoundationtotheslectionoftrenchsustentationsystem．Inthebasisoftheanalysepipelineengineeringcharacteristic，fourmodelesperimentswerecarriedout,underdifferentdensity,differentwatercontaininganddiff

5、erentrainfallintensity,experimentationresultsindicatethat：(1)Alongwiththeincreasingofsoildensity,itsstabilitygraduallyincreases，densityisallimportantfactoraffectingtheslopestability．(2)Underacertainextentthewatercontaininghelpstoenhancethestabilityofslopes，andove

6、rthatextentthestabilitywilldebasewiththeincreasingofthewatercontaining．(3)Underthesamerainfallthelongeristherainingdurationtheworsewillbetheslopestability,soitisevidentthattheclimateisakeyfactoraffectingthetrenchslopestability．(4)Thesoftfrictioncoefficientandcohe

7、siveforcevarysensitivelywiththewatercontaining,sothelatterisallimportantfactoraffectingthetrenchslopestability．Accordingtotheanalysisofexperimentalresults．referringtothefrictionparametersofsandyandcohesivesoilunderdifferentwatercontaininganddifferentdensity,calcu

8、latedbylimitbalaqcingtheory,computedbymethodproper,aseriesoftrenchslopestabilitycoefficientindifferentdepthisoblained．Onthebasisofthelatteranprogrammeforslelec