CF-真空排水预压加固软基中的孔隙水压力消散规律

20048SHUILIXUEBAO8:2003205214:(1971-),,,,:055929350(2004)08201232061,2,2(11,310027;21,310027):,,:;,,45m:;;;;:TV23316:A,,,,,,,,,[18],,1,K0+657K0+722,3600m2,015m2003124317,97kPa,92kPa2270cm,2206,2452d,82cm,318,1,KYJ231,0105%ZXY22,011Hz,,6m6m;,8m8m,2kPa,1mm3211,5(ky112ky53),15,243,8m17m26m,12,2160mm(kysj1kysj2),5,,,2050cm,,,,,,,(Yzk12Yzk4)(SP12SP6)(kysj12kysj2),,9(SW12SW9),,11Pmw(%)dsP(gPcm3)e0srKVP(cmPs)KHP(cmPs)a1-2P(MPa-1)1116031142175119001901968109E281145E2701432117044172175117611258981199E273129E27019511215059132176116511664981107E271193E27117911215031142174119301864992150E274193E2701332610035192173118611006986166E277136E27015321010036112173118611005982121E273106E27015031019036112174118601999997134E272168E270146:;qw=72cm3Ps121m,,112m,,,,,[8],,,22113,,,36m,,421,,2ky21ky23,252d,2ky21ky2322:(1),,25mMandel2Cryer[1],,9d70cm,,;(2),2m015m,15kPa,-36kPa,,2m,3035kPa,,;(3)4m40kPa,4m,4m,,314m,,8kPa,10kPa,4m,;(4)14m17m,,;(5)21m,25m,45m;(6)14m,2m,,,;(7),2ky21ky23PmPkPaPkPaPkPaPkPaPmPkPaPkPaPkPaPkPa251153651114630164644030104014683038686473017471789305989841301041255330235332123,352d33:(1),,21018,,;(2),80kPa,214m7cm,16cm,,;(3)521,21m,,Mandel2Cryer,,,,,;(4)30kPa,,50kPa,,5060kPa;(5),[8],(),,0170m,Sc1120mm,s,101lmm3kysjPmPkPaPkPaPkPaPkPaPmPkPaPkPaPkPaPkPa280156580108530558547830487814723042726803050802087305787887305787213,,,,,,,,,,3444,11m,kysj1kysj2,kysj1,kysj2,kysj1kysj2,,,0,0,,,,,,,,,,,,,,,,,,621,,[3][5]4(1):;(2),,;,,(3),45m(4),,,,(5):,,;;,,,,311mmPs,;,:[1].[J].,1988,(9):48-52.[2].[J].,1989,11(4):45-55.[3].[M].:,2002.[4],.[J].,2000,(3):43-46.[5].[J].,1991,(4):17-26.[6]TangM,ShangJQ.Vacuumpreloadingconsolidationofyaoqiangairportrunway[J].Geotechnique,2000,50(6):613-623.[7]Chuj,YanSW,Yangh.Soilimprovementbythevacuumpreloadingmethodforanoilstoragestation[J].Geotechnique,2000,50(6):625-632.[8].[D].:,2003.DissipationofporewaterpressureinsoftfoundationreinforcedbyvacuumdrainagepreloadingZHUJian2cai,WENXiao2gui,GONGXiao2nan(ZhejiangUniversity,Hangzhou310027,China)Abstract:Thestrengthofsoilcanbeimprovedbydissipatingtheporewaterpressurebymeansofvacuumdrainagepreloading.Inthispaper,thein2situexperimentaldataofabridgepierfoundationisusedtoanalyzethedissipationlawofporewaterpressureinsiltandsandintheprocessofpreloading.Theresultshowsthatthedissipationofporepressureconsistsoftwoparts.Oneisformedbythedirecteffectofvacuumandtheotherisduetotheloweringofgroundwatertable.Thedissipationofporewaterpressurein721siltisresultedfromloweringofthegroundwatertable,whileinsandwellandinthevicinityofplasticdrainageplateitisresultedfromtheeffectofvacuum.Thedegreeofdissipationdoesnotchangealongthedepthbuttheeffectofdissipationwillbemaintainedeveninthedepthof45mbelowtheplasticdrainageplate.Consequently,theplasticdrainageplateisthebestwayforreinforcementoffoundation.Keywords:reinforcementofsoftfoundtation;vacuumdrainagepreloading;porewaterpressure;dissipation;silt;sandwell;loweringofgroundwatertable(122):[1].[M].:,2003.[2],.2010[M].:,1998.[3],.21[M].:,1999.[4].1998P99[M].:,2000.[5]()PeterHG.[M].,.:,2000.InvestigationonmethodfordeterminingwaterwithdrawalquotapertenthousandYuanGDPQINFu2xing,GENGLei2hua,CHENXiao2yan(NanjingInstituteofHydraulicResearch,Nanjing210029,China)Abstract:ThewaterwithdrawalpertenthousandYuanGDPisanimportantindexforwaterresourcesmanagement.Twomethodsnamelyexponentialmethodanddescendratemethodaresuggestedtoestablishthemodelforforecastingthewaterwithdrawal.Asanexample,thewaterwithdrawalpertenthousandYuanindifferentlevelyearsinShanghaiisanalyzedbyusingthismodel.BasedonthecomparisonofwatersavinglevelbetweenShanghaianddevelopedcountryandanalysisonwatersupplyprojectionforShanghai,thewaterwithdrawalquotaspertenthousandYuanGDPinShanghaifordifferentsectorsindifferentlevelyearsisdetermined.Theevaluationoftheforecastedresultshowsthattheproposedmethodisfeasible.Keywords:GDP;waterwithdrawal;quota;model;forecasting;evaluation821