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1、AbstractWiththerapiddevelopmentofournationaleconomy,high-riseandultrahigh-risebuildingsalsowillbeoutinlargenumbers.Thisbroughtinordertosavetheland,theexcavationandsupportoflarge-scaleexcavationengineering,undergroundengineeringandconstructiontoprovidet
2、henecessarysecurityenvironment.TheseworkscommencedareconsideredasthescopeofFoundationPitEngineering.FoundationPitEngineeringisanimportantpartofgeotechnicalengineeringdisciplinesandthedesign,construction,monitoringandprogramoptimizationhavebecomeimporta
3、ntfactorsinthesuccessorfailureofprojects.Itaffectsnotonlytheprojectitself,butalsothesurroundingenvironmentoftheproject,suchassurroundingresidents,thesurroundingbuildingsmaterial,municipalundergroundpipenetwork,urbanroadsandsoon.Thereforeitsresearchisof
4、greattheoreticalandengineeringpracticevalue.FoundationPitEngineeringwhichincludesthedesignandconstructionofFoundationProtectionSystemandexcavation,isaverycomplexsystemengineering.Basedonthis,thedesignofitssupportprogramssubjectstoanumberoffactors,Anobj
5、ectiverequirementisputforwardforthisdesign:Whendesigningprograms,designersneedtotakeintoaccountvariousfactorsandindicators,andbeaccessibletothemaximumpossiblemeetallrequirements.Onlyanumberoffactorsandtherequirementsindicatorstakenintoaccountcanthebest
6、overallsupportingprogrambeobtainedultimately.Thepurposeofthispaper:howcanthefoundationpitsupportprogram,inthepremiseofintegratingvariousfactors,reachtotherequirementsthatisscientific,economic,environmentalprotectionandtheshortestduration.Thisrequiresth
7、edesignertooptimizetheprogramwhenconfrontedwithdifferentoptionsandeventuallychoosetheoptimalsolutionwhichissafe,feasible,costeconomy,theenvironmentalprotection,andtimesavings.Thisresearchmethod：Thesubstanceoffoundationpitsupportprogramisconsideringdeci
8、sionproblemundermulti-objective.Fromthesystemengineeringpointofview,thepreferredmodesandthemethodoftheexcavationprogramhavebeenproposed:AHPandmulti-objectivefuzzydecisiontheorytooptimizetheselectionofsupportprograms.Comparisonandverific
