渣土改良流态固化土路用动力特性研究

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WU Yuedong，ZHANG Ruixing，LIU Jian，YANG Bowen （College of Civil and Transportation，Hohai University，Nanjing 21OO98，China）

Abstract：Toaddress theproblemofroaddynamicsofsolidsoilimprovedbywasteresidueinengineeringconstructioninChina， it is proposed toadoptcement-flyashcompositecuringagenttoimprove wasteresiduetopreparefluidcuredsoil，simulate traffic load（half sine wave， 1Hz ，20-520 kPa graded loading）by DDS -70 electromagnetic dynamic triaxial test system， andsystematicallstudytheinfluenceofthe water-to-solidratioandthegrey-to-soilratioonthedynamicsofthematerial. Theresultsshowsthatthedynamic stress-strainrelationshipof slag-improved fluid-consolidated soil shows significant nonlinearcharacteristics，andtheincreaseof grey-soilratiocanshortentheelasticphaseandraisetheelasticultimatestres to280 kPa ；thedamping ratioshowsa trendof decreasingandthen increasing withthedynamicstrain，and thepeak valuereaches （20 35% ，andtheincrease of grey-soil ratio significantly enhances the eficiency of energyabsorption；thecumulative plastic deformation is controllbleunder long-term dynamic loading，and the strain valueunder typical municipal traffic load（ ⩽200 kPa）meets therequirementsof theroadwaydynamiccharacteristics.With itsself-compacting，lowcementconsumptionand pumpingadvantages，fluidcuredsoilnotonlyrealisestheeficientresourceutilisationof engineeing wastesoil，butalso reducesconstructioncostsandcarbonemisions，providingan innovativesolution forgreen infrastructureconstruction that

combinesperformanceand environmental benefits.

Key words：resourceutilisationof wastedirt；fluidised solidifiedsoil；dynamic triaxial test；dynamic behaviour；flyash contentratio

0 引言

随着我国城市化进程的快速推进，工程建设产生的废弃渣土年产量已逾数十亿立方米。（剩余5887字）