Page 190 - 《水资源与水工程学报》2023年第2期
P. 190
!34 " ! 2 # & ' ( ) & * + , - Vol.34No.2
2023 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2023
DOI:10.11705/j.issn.1672-643X.2023.02.24
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GHIJK:TU753 LMNOP:A LQRK:1672643X(2023)02018608
Analysisofsupportperformanceanddeformation
predictionofribbedsupportingstructure
1
1
2
1
WANGBinhua,ZHANGAijun,FUXiaodie,LIUHongtai
(1.NorthwestA&FUniversity,Yangling712100,China;2.ChinaJIKANResearchInstituteof
EngineeringInvestigations&DesignCo. ,Ltd.,Xi’an710043,China)
Abstract:Ribbedsupportingstructureisanewtypeoffoundationpitsupportingstructure,whichiscom
posedofsteelsheetpilesandribplatesthatrigidlyconnectedwiththepiles.Theexistingengineeringca
seshaveprovedthatthesupportingperformanceofthestructureissatisfactory.However ,thesupporting
mechanismofthisstructureisyettobefurtherinvestigatedandprovedbyexperiments.Intheprocessof
foundationpitexcavation ,thedeformationandmechanicalcharacteristicsoftheribbedsupportstructure
andthestabilityoffoundationpitarestudiedbyfiniteelementmethod ,andthecalculatedresultsare
comparedwiththemeasuredvalues.Moreover ,theinfluenceofribwidthandribspacingonthehorizon
taldisplacementandstabilityofthestructureisanalyzed.Accordingtotheanalysis,themaximumhori
zontaldisplacementpredictionformulaisproposed ,whichcanpredicttheactualpossibledisplacementof
thesupportstructure.Theresultsshowedthatthedisplacementandinternalforceoftheribbedsupport
structurearemuchsmallerthanthoseoftheconventionalsupportstructureofsteelsheetpilesforthesame
project ,forexample,themaximumhorizontaldisplacementofthesheetpilesisdecreasedby71.56%
whentheribwidthis1.60mandtheribspacingis0.80m.Inthiscase ,thebendingmomentdistribu
tionofsheetpilesisrelocated ,thebendingmomentofthesheetpileisgreatlyreduced,sothestabilityof
thefoundationpitisimproved.Ribplatescannotonlygreatlyimprovethebendingstiffnessofthestruc
ture ,butalsocanproducealargeranchortensionforthestructuretoresistthesoilpressureonthefront
rowofsteelsheetpiles.
Keywords:foundationpitsupportingstructure;ribbedsupportingstructure;combinedsupportingstruc
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