CAJ | 학술논문

为研究位于垃圾填埋场斜坡上衬垫结构在垂直应力作用下沿斜坡滑移的剪切特性，研制了大型叠环斜面单剪系统。通过砂-无纺土工布-土工网-HDPE膜-黏土结构的大型斜面单剪试验，得到剪切过程中发生破坏面转移位移对应的垂直应力和水平应力，计算得到位移面的转移法向应力。试验结果表明：当界面的法向应力小于转移法向应力时，破坏面为土工网与土工膜界面；当界面的法向应力大于转移法向应力时，破坏面为土工膜与黏土界面。建议破坏面转移前后的界面强度包线用双直线表示，土工膜与相邻材料的剪切强度特性用双曲线表示，破坏面的转移法向应力等参数由试验确定；大型叠环斜面单剪系统为分析多层复合衬垫剪切特性提供新的试验研究方法。
위연구위우랄급전매장사파상츤점결구재수직응력작용하연사파활이적전절특성，연제료대형첩배사면단전계통。통과사-무방토공포-토공망-HDPE막-점토결구적대형사면단전시험，득도전절과정중발생파배면전이위이대응적수직응력화수평응력，계산득도위이면적전이법향응력。시험결과표명：당계면적법향응력소우전이법향응력시，파배면위토공망여토공막계면；당계면적법향응력대우전이법향응력시，파배면위토공막여점토계면。건의파배면전이전후적계면강도포선용쌍직선표시，토공막여상린재료적전절강도특성용쌍곡선표시，파배면적전이법향응력등삼수유시험학정；대형첩배사면단전계통위분석다층복합츤점전절특성제공신적시험연구방법。
A large-scale inclined ring simple shear system was developed to investigate the shearing behavior of landfill liner systems placed on the side slopes under vertical stress .A test was conducted on a multi-layer composite liner system , which consisted of a sand layer , nonwoven geotextile , geonet , HDPE geomembrane , and compacted clay .The normal transfer stress was calculated by the vertical and horizontal stresses according to transfer deformation of sliding surfaces .The results show that failure occurred at the interface between the geonet and geomembrane when the normal stress was lower than the normal transfer stress .The failure face would shift to the interface between the geomembrane and compacted clay when the normal stress was higher than the normal transfer stress.It is suggested that envelopes of the interface before and after failure transfer be simulated by bilinear curves , the interface shear behavior between the geomembrane and adjacent materials be expressed as hyperbolic curves , and the parameters , such as normal transfer stress , be determined by the test .The large-scale inclined ring simple shear device provides a new method for investigating the interface behavior of multi -layer composite liner systems .