Page 186 - 《水资源与水工程学报》2022年第6期
P. 186

! 33 " ! 6 #                      & ' ( ) & * + , -                               Vol.33No.6
               2022 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2022

            DOI:10.11705/j.issn.1672-643X.2022.06.23


                   ‚ƒÈ„4€þ…†þL?nZ1Âd´|}


                                                    1,2         2,3        1
                                             )ƒå , æçv , jèè
                (1. Îz6i 6Î#ÔEe‹h;µ(sôX$%5†|, 6Î Î; 710123;2. r2-6i,Ռe…6&Jê
                           Œe…6(gh23$%5†|, gy ,Õ 430071;3. r2-6ic6, yz 100049)

                 F G: B^eº…[± K ܌egh_96grŸ$$±, (ÆÇÝJ›°、 ¡é¼zíÁ, Œ]YäÞ K                               0
                                      0
                 v:K‘Ül;Ž¬;KXŸ0å。`¥"ªÙž¥Y‹U^eYi, aq«“x†jN²ƒ…:†
                 (KSB)、 ö÷áø:†(DMT) (ùº:†(PMT) ÀP|¯ K Y‹:†, ÇC«¥Y‹U^eYi K ¼z,
                                                              0                                0
                 ¬D« KSB((³v:K‘ŸR0X、 ¿£X’‚uX。&J­®:KSB:†ÄY<=«ì†“ º>R” v:
                 ŸÖ†X(#ÊXE<, âĝE®˜、 PO.fo%, vCxY¥Y‹U^e K -0à 0.45~1.81 Õö, ¤š
                                                                                0
                 +OKL3šnÑ; |¯:†Þ%|h’ PMT ÄgŽŽ|hi톻N²ƒ…àá, È°@åÀ‘/µâí(
                 ó»-, §ÈH͸§v:‹¬èÑ;DMT ŸÄYXއàֆQRŸäÞ,Marchetti QR.Å« K -, È2¯Ë
                                                                                             0
                 "、 Ab、 Yb、 Î;fYnֆ‹¬ÞŠèÑ, {|ìm Marchetti QR, –¹‚Õà"ªÙYnŸ¥Y‹U
                 ^eŸ K 9GK‘, ;ëB(_9d。
                       0
                 HIJ: B^eº…[±; eŠ†jN²ƒ…n; U^e; ¥Y‹e; †j:†
                 KLDMN:TU411;TV32   OPQRS:A    OTUN:1672643X(2022)06018207
                        Insituexperimentalstudyoncoefficientofearthpressureat

                                         restofoverconsolidatedsiltyclay

                                                  1,2
                                                                    2,3
                                    CHENShufeng ,KONGLingwei ,LIHuanhuan            1
              (1.ShaanxiKeyLaboratoryofSafetyandDurabilityofConcreteStructures,XijingUniversity,Xi’an710123,China;2.StateKey
               LaboratoryofGeomechanicsandGeotechnicalEngineering ,InstituteofRockandSoilMechanics,ChineseAcademyofSciences,
                          Wuhan430071,China;3.UniversityofChineseAcademyofSciences,Beijing100049,China)

                 Abstract:Thecoefficientofearthpressureatrest(K ),whichisaffectedbyanumberoffactors,isan
                                                              0
                 importantparameterforthedesignandconstructionofgeotechnicalengineering.Choosingappropriate
                 methodoftestandanalysisisthekeytoensurethereliabilityofthetestresults.Toinvestigatethe K 0
                 characteristicsofaoverconsolidatedsiltyclaystratuminHarbinCity,aseriesofinsitutests,including
                 K steppedbladetest(KSB),dilatometertest(DMT),andpressuremetertest(PMT)togetherwithlabo
                  0
                 ratoryK oedometertestwereconductedandcomparativelyanalyzed.TheresultsshowedthatKSBavoi
                       0
                 dedsoildisturbanceandempiricalproblemsofconventionalpushintests ,andpossessedthevirtuesof
                 simplicity ,efficiencyandhighprecision.ThevalueofK obtainedfromKSBwasintherangeof0.45-
                                                                0
                1.81 ,andpresentedadecreasingtrendwiththeincreaseindepth.Ontheotherhand,theK valuesfrom
                                                                                              0
                 laboratory K oedometertestandPMTwereseverelyunderestimatedduetothefactthatthereleasedinitial
                           0
                 lateralstressintheunloadingprocesscannotfullyrecoverduringthereloadingprocess.Thereliabilityof
                 DMTwasstronglydependentontheempiricalanalysisformulaselected.Itisfoundthatthe K valuesof
                                                                                                0
                 HarbinsoilweremarkedlyoverpredictedbytheconventionalMarchettiformula ;however,itunderestima
                 tedthesoilsinShanghai ,Suzhou,HangzhouandXi’an.ToestimateK ofHarbinoverconsolidatedsilty
                                                                             0
                 clay,anovelempiricalformulawasproposedbasedonthecalibrationofMarchettiformula,whichcan

                !"#$:20210929; %&#$:20220228
                '()*: 2345-678,1(12102367、41877281); 6Î#45-67æ&J9:,1(2021JQ-870);6Î#u
                        vuK×+,,1(21JK0961); Îz6i.iÔCt+,78(XJ20B11)
                +,-.: ‡¡ (1989-), V, 01ÌC, DE, XI, &JKLM¼Úe…6。
   181   182   183   184   185   186   187   188   189   190   191