Page 159 - 《水资源与水工程学报》2023年第5期
P. 159

! 34 " ! 5 #                      & ' ( ) & * + , -                               Vol.34No.5
               2023 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2023

            DOI:10.11705/j.issn.1672-643X.2023.05.18


                             'P CBR}îUSzTU2ýVƒ

                                            W*·s¿>?


                                            1        1       1         1          2,3
                                     ¸¹º , T » , — ¼ , $½— , $'¾
                (1. =!k# ;ã#$, ZP P! 710064;2. š‚ƒ0„aÝðé:*#æÙ+J$, š‚ƒ ‚Nƒ° 010051;
                    3. bc!‡ç‚aÝðiÌy[›«±XüwŒÝðé:¯«efghi, š‚ƒ ‚Nƒ° 010051)
                 @ A: mnX–gh¸¹‹%¿;ãã2&ßI, ayJpã2«ãþI±q|e@_™———Ú9áŒ
                                                                          3D
                 7(CBR) `hÅ?£ã2úぺŒ&|áŒ$。2‹g¹ÔŒ\ PFC ­ CBR`hÙUþèݪPQ+J,
                         3D
                 Š›œ PFC ·Y‘­`ʚ^®¯èJ, ‰Šg¹&q7 k/k、 ƒ„Fª μ 、 ]zº±q T、 G]z
                                                                         s
                                                                       n
                                                                                                 σ
                 º±q S êg¹þèݪ­`hº»|PQ。 +Jº»¼½: g¹&q7 k/k­ CBR4cÐnPQ, ƒ„Fª μ
                                                                           n
                       σ
                                                                             s
                 Ng¹zº±q T W CBR4ŽRS>H‡。 ý›œzº±q7 T /S, ­7G]W]zº±q­ CBR`hº
                               σ
                                                                        σ
                                                                     σ
                 »|PQ, 1xG]zº±q S ­ CBR 4PQKk; G]zº±q S ?Žp'WˆG]US, ]zº±q T ?
                                                                                                      σ
                                        σ
                                                                     σ
                 ›¶’¼]zÕS。
                 BCD: ä©HI; 䩖N; mnX–; Ú9áŒ7(CBR) `h; g¹ÔÀ; þè#ݪ
                 EFGHI:U416.2   JK7LM:A    JNOI:1672643X(2023)05015510
                       Studyonmesomechanicalparametersofgradedcrushedstone
                                   from tunnelwasteslagbasedonCBRtest
                                                  1
                                                                               1
                                   1
                                                               1
                                                                                                2,3
                       YUEXiabing,HUANGJiao,DINGTong,WANGYiding,WANGXueying
                (1.SchoolofHighway,Chang’anUniversity,Xi’an710064,China;2.InnerMongoliaResearchInstituteofTransportation
                   ScienceDevelopment ,Hohhot010051,China;3.KeyLaboratoryofTransportIndustryofManagement,Controland
                   CycleRepairTechnologyforTrafficNetworkFacilitiesinEcologicalSecurityBarrierArea,Hohhot010051,China)
                 Abstract:Gradedcrushedstoneiswidelyusedasthebasefillerofexpresswaypavement.Asanimpor
                 tantmeanstodeterminethestrengthofsubgradesoilandpavementmaterials,CaliforniaBearingRatio
                 (CBR)testcanreflecttheactualbearingcapacityofthesubgradeorpavementstructurelayer.Basedon
                                         3D
                 theparticleflowsoftwarePFC ,theinfluenceofmesoscopicparametersontheCBRtestisstudied.With
                                                  3D
                 thehelpoftheforcechainmodelinPFC ,theinternalforceevolutionprocessofthesampleisobserved,
                 andtheinfluenceofparticlemicroscopicparameterssuchasparticlestiffnessratiok/k,frictioncoeffi
                                                                                        n  s
                 cient μ ,normalbondstrengthT andtangentialbondstrengthS onthetestresultsisdiscussed.There
                                           σ                          σ
                 sultsshowthatk/khasnosignificanteffectontheCBRvalue, μ andT bothhavealinearpositivecorre
                              n
                                                                            σ
                                 s
                 lationwiththeCBRvalue.Then ,theinfluenceofnormalandtangentialbondstrengthontheCBRtest
                 resultsiscomparedusingthebondstrengthratio T /S.ItisfoundthatS hasasignificantimpactonthe
                                                           σ  σ               σ
                 CBRvalue,itmainlydeterminesthetangentialplasticityofthecontactkey,whereasT mainlycontrols
                                                                                          σ
                 itssurfacenormaladhesion.
                 Keywords:tunnelingengineering;tunnelwasteslag;gradedcrushedstone;CaliforniaBearingRatio
                 (CBR)test;particleflowsimulation;mesomechanicalparameter

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                +,-.: û0l(1987—), 7, µQ!:(, ;<, x<b²>, +Jœ]y°##S©«HI¸¹、 W[ä©@2
                        W¿ê。
                /0+,: ´ å(1997—), 7, ‡Q{:(, x<+Jb, +Jœ]yæã2C¢…C。
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