中、高压下粗粒土-结构接触面特性受结构面形貌尺度影响的试验研究

中、高压下粗粒土-究形貌尺度对中、高压下粗粒土-Abstract:Inthispaper,theexperimentofcontactcharacteristicsbetweencoarse-grainedsoilandstructureundermediumandhighpressurewasconductedtoinvestigatetheeffectofstructuralsurfacemorphologyscaleoncontactcharacteristics.Theexperimentalresultsshowthatthestructuralsurfacemorphologyscalehasasignificantimpactonthecontactcharacteristics.Withtheincreaseofthestructuralsurfacemorphologyscale,underthesamepressurecondition,thecontactareaincreases,buttheincrementaldecrease,thefrictionanglegraduallydecreases.Meanwhile,underdifferentpressures,thecontactdensitydecreasesgraduallywiththeincreaseofthestructuralsurfacemorphologyscale,whichindicatesthatthestructuralsurfacemorphologyscalealsohasacertaininfluenceonthecontactdensity.Overall,theeffectofstructuralsurfacemorphologyscaleonthecontactcharacteristicsbetweencoarse-grainedsoilandstructureundermediumandhighpressureshouldbegivenenoughattention.Keywords:coarse-grainedsoil;structuralsurfacemorphologyscale;contactcharacteristics;experimentalresearch5-12mm的黄砂粗粒土。结构面材料采用的是40Cr优质合金钢，表面磨平度较高。110.5、1、24mm共四种情况，压力为5、10、15和20kPa共四种情况。接触面密度和摩擦角是件下绘制相应的接触面积-压力曲线（如图2所示）。2不同结构面形貌尺度下的接触面积-下绘制相应的摩擦角-压力曲线（如图3所示）。3不同结构面形貌尺度下的摩擦角-可以看到，不同结构面形貌尺度下的摩擦角随着压力的增加而增大，但随着结构面形貌尺度的增加，摩擦角逐渐降低。这表明结构面形貌尺条件下绘制相应的接触面密度-压力曲线（如图4所示）。4不同结构