Pore pressure in isotropically and anisotropically consolidated clays

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Two clay

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Avail:UnlvarsityMlcrofilms, 18 BedfordRow, LordonWClR4E3, UK MATE%M?ICALMODELFORLAROE 775047 ONE=DDC3t?SIOK4L SrRAIRCOESOLIDATIOM Monte,JL Ph D thesis,Northwestern Univ,1975,73P A~~icalmodelhasbeendnrelopedtorepresentthe one-dimensiorsllarge stralncoa sdlidationofafully saturated claylsyar.Incluledintha szdalare pr~lslons to account for the variationsin soilcanpressibility aad permeability as consolldatlon prcgresses. Avail:UniversityMicrofilms, I.8BedfordRm, LoIdcnWClR4E3,uK APPROACETOORE-DIMENSIONAL 775048 PROBABILISTIC cONS(xIDA!rIoR m El-Marrrsi, H EDH Ph D tbesis,~esternUnlv,

1975,197P

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statistlcsltechniques are amlIed to the resultsof more than700 consOlldZion tests psrformedon a large vsrlety of urdlsturbed soils.TheeKperimental.dataare ~~~anl.rcaucsd,catainetlglaeeciryS~~ partlesare correlatedwitbclasslflcationf0r lxxlexdata,theresultirgfcPnrmlatious sretested ftx &atistlcalan3 mslcsl signific~c, an3 the associated conceptssre appliedtodeterminecoxr s&%sme&sinfleldproblemsunler solldatlon ~~c~ti~.Thevariationeindiiigent soilpropertdes sre mamincdtlWOt@ltbeCalcrr latsdstatistlcalpsrssmtars of sachproperty, axlltisfouxdthatmost of thesevariations can bs mlntenns of eitherthe xsmal cr logrx7rmalbistribtions. S-0 llussrregresslon squationsarederlvsdto~edictthevalues of the c~ession lnisxaxd can~essionratioin terms of the initialvoid ratio. Fzmbabllistic

dbcussed axdlsboratorytestsfortheirdetermiaationsrepopossd. Avsrlatlonslprinzlple ardafixliteclcmcntmctbodofsolutionareprr sentedfor threcdlmensionsl snlpssulo tbreedlmensiomlthecries. Ccmputerprc&smsfcx analysisof consolidation ~aoblemsin plane strsinaadaxlsl symme&yuslrg~flnLte element Ethal.areoutlined;Thse~cgramsarevcrifled bycan~isonwithsnslytlcsl anlnumerical 8olutSons: Ihe versatility of three-dimensionsl consolldatlontheory an3 of the finiteelement lnathod Is demonstrated with the solutionof the rigidroughfootingproblem.Auth.

controlled

chani~lcs(fl~culatcd~bispcrsed)were consolldatsduxlerdlffsrexrtvalues of the major (axlal)~lnoQsl stressinlsrge-dismeter r&id, oylindzdcsl slurryconsolldam5ters, snl thesxisldeftn7satlons,porepessures, axlboth axialsnlradisl stressesweremsasureddlrectly, thgeby~ngacoxtl~recordofthe stress anlstrsinhistuyaC saohssmple.Ingensral, Kowasfamlto Imlnt&lanalmostconstantvelue dtiag*ec~~essionphaseafalosd&gunlosdlxgcycle,whereasitsvsluelncreasedgradusllyd~~rebouml srd lt acceedsdunitywhen theoverconsolldatlonratiowasabout2.After c~~onafoonsolidation, thefabric of the ssugdewasidentlfiedbytbecanbineduseof scsnnlagdlectronmicroscopy, opticalmicroscopy, anlx-raydifPra&Qseky. The processes of Koconsolidationwere thsn armlyzedani interxreted intsrmsofthepredakdnantclsyfkbricsardthe micro-me&azdsmsthat prevsildurirgthedifferent l*-unloadlrgcycles.

Av&l:UxlversityMlcrofilms,l8 BedfordRcw, Lo&onWC!lR4EJ, UK 775049 ~IONOFTEREE-DIME!NSIOEALTEEORU=

OFCOEWON Martin,BL ph D thesis,ColoradoUniv,1975,125p Derlvatl~aftbrecdimcnslonal oonsolidati0n ~eoryardps~o~ee-d3mensiomlconsolldation *ecrysrepe&; Physicalconstantsare

Avail:University Microfilms, 18 B&ford Row, LordonWClR4FJ, UK 775050

FORE PRESSJFtE IN 1SOTR0P1CALL.Y AND ANISOTROPICALLYCONSOLIDAfCED CLAYS Sayak,TF Ph D thesis,WV StateUniv,1975, 23OP

Afunctionfrx ~redictirg porewater pressures insaturated,hancgensous, xanmllyconsolidated soilsunier an isotropicm an anisotropic Ko, ekress systemhas been developed. The function was studiedqualitatively ani quantitatively for trisxialcan~essiontestson EdgarPlastic Ksolin&Fire ClsyFlour.Ihe testscontained Isoteopk aJlaKo, snlsotropic consolidations for at leastthreedifferentstresslevelsard two appliedstresspaths.In the case of naturally, Ko consdUdatsdclaysthefunctionisgrcmisi~pl; After establlshlzg tie preciseralationshlp between ths par-tar naxxlPlastlcityitiex,kuowirg tie stressratio at consolidation ani the Plasticity lrdexof the soil,anltheotherpersmetersfrcm one test,theporewater pressurefm naturslly consolidated soilsmsybe easily~edictedfrom the derivedfunction. Avall:UniversltyMicrofilms, 18 BedfordRow, Lotion

WCIR

4EJ, UK

775051 FORE-PRESSUREFUNCTIONFOR PRECOEOLIDA!l'ED

-CLAY chlvalak,s Ph D thesis,Wayne StateUnLv,1975, 292P Sedimented kaolinltean8 Illit.preconsolldated saturatedspecimensweresubjectedto consolldated-undrained trisxlalcaupresslonbymeans of controlled losdrate;Lar ratesof applied10~113 were used for usualarrl devlstoricconpression tests;Princlpslstressdiffererrs-ma,j* ps?lac~=1 strain, pore presmrce-najor princL*~str~in rGG tionshlpswere established. Renlullceffective stresspathswereplottedto seethedifference betweennormsJlyconsolidated ardpreconsolidat~ _-_ clays. The pore pressure-majm prirrlpal strsln relationship is depsxlentupontbeQpe of clsy,

stresshistoryanilevelof strain; Aoail:U&rersityMlcrofilms, l8 BedfcsdRow, Lolri0nWCl.R 4W, UK 775052EXPER_tG~~ F

OF THE TIME RAIE OF SWELLI[Nc

ph D t&s, Illl~l~is UnLv,Urti-Chsmpalgn, 1975, 366~ A seriesof 24 lsolxopicswelli~ testsand 17 0n3llmensional. swelllxgtestswas perfcrmsdon naturalcanpositions of Duck &e&Crab aCchsrd, Cucsracha, ani Besrpswshales.Isotropictests were perfcsvssd lntrisxial. cellsard one-dimensioml testsin fixed-ring consolidar&ers. In