The self-weight of solid waste or machine-rolled compaction can induce or trigger contaminant migration in the landfill.Although the consolidation-induced hydraulic gradient driving solution transport has been extensively investigated,little attention has been paid to ion migration caused by its concentration gradient variation.It is necessary to more precisely predict the multi-stage contaminant transports in deforming porous material.Based on the modified Cam-clay model,the proposed fluid-solid coupled model can simulate the elastoplastic deformation behavior of layered kaolinite and KBr solution transport/sorption,and its modeling results were validated by published laboratory data.The solid-fluid interactions were analyzed by comparing various transport manners of K+and Br-from excess pore pressure generation to dissipation.Results reveal that the consolidation process can accel-erate KBr solute advection from the contaminated layer into the uncontaminated layer,and then affects the subsequent diffusion,mechanical dispersion and sorption for K+and Br-.The simulations also indicate that consolidation-induced solute transport is time-dependent,and therefore the ion diffusion and mechanical dispersion should receive more attention.

Chunguang Wang;Shuqing Liu;Xingkai Shi;Guanglei Cui;Hongxu Wang;Xing Jin;Kunkun Fan;Songtao Hu

College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao,266590,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang,110004,China;Shandong Provincial Geo-Mineral Engineering Co.,Ltd.,Jinan,250013,China

岩石力学与岩土工程学报（英文版）

[1]Chunguang Wang;Shuqing Liu;Xingkai Shi;Guanglei Cui;Hongxu Wang;Xing Jin;Kunkun Fan;Songtao Hu-.Numerical modeling of contaminant advection impact on hydrodynamic diffusion in a deformable medium)[J].岩石力学与岩土工程学报（英文版）,2022(03):994-1004

Numerical,modeling,contaminant,advection,impact,hydrodynamic,diffusion,deformable,medium,self,weight,waste,machine,rolled,compaction,can,trigger,migration,landfill,Although,consolidation,induced,hydraulic,gradient,driving,solution,has,been,extensively,investigated,little,attention,paid,caused,by,its,concentration,variation,It,necessary,more,precisely,predict,multi,stage,transports,deforming,porous,material,Based,modified,Cam,clay,proposed,fluid,coupled,simulate,elastoplastic,deformation,behavior,layered,kaolinite,KBr,sorption,results,were,validated,published,laboratory,data,interactions,analyzed,comparing,various,manners,K+and,from,excess,pore,pressure,generation,dissipation,Results,reveal,that,process,accel,erate,solute,into,uncontaminated,then,affects,subsequent,mechanical,dispersion,simulations,also,indicate,dependent,therefore,should,receive

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