CAJ | 학술논문

典型垃圾填埋场衬垫系统由土/土工膜、土工膜/土工织物等多个界面组成，这些界面抗剪强度低，成为潜在的滑裂面，容易使填埋场发生沿界面的失稳破坏。本文根据大量土/土工膜界面直剪试验的研究，针对该界面的变形机理和应变软化特性，在前人研究的基础上确定了接触面的厚度，定义了接触面的切向应变和法向应变，将界面的变形分为3个阶段：弹性阶段，塑性阶段和残余阶段。同时提出了适合于土与土工膜界面的弹塑性本构模型。该本构模型参数较少，物理意义明确，运用简单方便。最后，结合Filz接触面直剪试验和钱学德单剪试验的结果，将通过该模型得到的拟合结果与之进行了对比验证分析。研究结果表明：本文提出的土与土工膜界面弹塑性本构模型是合理可行的，且建模方便，适用于工程实践。
전형랄급전매장츤점계통유토/토공막、토공막/토공직물등다개계면조성，저사계면항전강도저，성위잠재적활렬면，용역사전매장발생연계면적실은파배。본문근거대량토/토공막계면직전시험적연구，침대해계면적변형궤리화응변연화특성，재전인연구적기출상학정료접촉면적후도，정의료접촉면적절향응변화법향응변，장계면적변형분위3개계단：탄성계단，소성계단화잔여계단。동시제출료괄합우토여토공막계면적탄소성본구모형。해본구모형삼수교소，물리의의명학，운용간단방편。최후，결합Filz접촉면직전시험화전학덕단전시험적결과，장통과해모형득도적의합결과여지진행료대비험증분석。연구결과표명：본문제출적토여토공막계면탄소성본구모형시합리가행적，차건모방편，괄용우공정실천。
In the landfill,liner systems typically contain a large number of material interfaces(soil/geomembrane or geomembrane/geosynthetics).These interfaces become potential slip surfaces because of the low shear strength, which results in the instability of landfill.Based on many direct shear tests,the deformation mechanism and strain softening property of soil/geomembrane interface,the interface thickness,tangential strain and normal strain are determined.The deformation of the interface is divided into three stages:elastic stage,plastic stage and residual stage.Above all,the elastic-plastic interface constitutive model is put forward.There are only a few parameters with clear physical meanings in the model.At last,the results using this model are compared with those of the interface direct shear tests and ring simple shear tests.The comparison results show that this model is reasonable and feasi-ble,and can be used for practical engineering.