Monitoring and analysis of the bending behaviour of discrete piles.pdf

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1、Smethurst,J.A.&Powrie,W.(2007).Ge´otechnique57,No.8,663677[doi:10.1680/geot.2007.57.8.663]MonitoringandanalysisofthebendingbehaviourofdiscretepilesusedtostabilisearailwayembankmentJ.A.SMETHURST*andW.POWRIE*Discretepilesareusedtostabiliseinfrastructureslopes,Onutilisedespieuxdiscretspourstabiliserl

2、espentesespeciallywherethereisinsufficientadditionallandtod’infrastructures,notammentlorsqu’onnedisposepasdeallowconstructionoflargetoebermsorregradingoftheterrainssupple´mentairessuffisantspourpermettrelacon-slope.Comparedwithmoreconventionalstructuressuchstructiondebermesenavaloulamodificationdupro

3、fildeasretainingwalls,therearefewfielddataonhowlapente.Parrapporta`desstructuresdetypeplustradi-discretepilestypicallybendanddisplaceunderslopetionnel,parexemplelesmursdesoute`nement,ondisposeloading.Thispaperpresentstheresultsfrommonitoringdebienpeudedonne´essurleterrainpermettantdesavoiranumberofd

4、iscretepilesusedtostabilisearailwaycommentlespieuxdiscretsonttendancea`sepliereta`seembankmentatHildenborough,Kent,UK.Bendingde-de´placersouslesforcesdespentes.Lapre´sentecommu-flectionsdeducedfromstraingaugesarecomparedwithnicationpre´sentelesre´sultatsd’examenseffectue´ssurunthedisplacementsandro

5、tationsmeasuredbyinclin-certainnombredepieuxdiscretsservanta`stabiliserunometertubescastintothepiles.Fouryearsafterpiletalusdechemindefersitue´a`Hildenborough,dansleKent,installation,thepileswerebendingdownslopeovertheirauRoyaume-Uni.Oncomparedesfle`chesparpliagelowerhalves,withlittlebendingmeasure

6、dintheupperde´duitesdesreleve´ssurlesjaugesdecontrainteetlessections.Regradingoftherockfillpilingplatformshortlyde´placementsetrotationsmesure´savecdesinclinome`tresafterpileconstructioncausedsomeofthepileloading,moule´sdanslespieux.Quatreansapre`savoire´te´misenwithfurtherloadingcausedbythecontinu

7、edtendencyplace,lespieuxpre´sentaientuneinclinaisonverslebasdeforslopemovement.Analysisofthepilesusingasimplelapente,surleurmoitie´infe´rieure,lafle`chemesure´esurelasticanalysisgivesbendingmomentsanddisplacements