文章编号：1007-2993（2023）04-0443-06车辆荷载作用下风积沙和砾类土低路堤响应差异性研究刘大鹏王婧程强强刘梦溪（江苏建筑职业技术学院，江苏徐州221116）【摘要】风积沙和砾类土是新疆绿洲–荒漠区常用的路基填料，为探明车辆荷载作用下风积沙和砾类土低路堤应力和应变响应的差异，分别采用风积沙和砾类土作为填料建立低路堤1∶1足尺模型，进行了地基含水率分别为18%、23%和28%的静载、短时动载和长时动载作用下低路堤模型试验。试验结果表明，长时动载作用下低路堤应力和应变最大，短时动载作用下应力和应变最小。静载、短时动载和长时动载作用下砾类土和风积沙低路堤的应力均随着深度的增加而衰减，砾类土低路堤衰减速度较快。距路基顶面0.6～1.0m处存在应力响应分界点，路基顶面至分界点段砾类土低路堤的应力大于风积沙低路堤，分界点以下风积沙低路堤的应力大于砾类土低路堤。砾类土低路堤各结构层的应变均小于风积沙低路堤，随着地基含水率的增加风积沙低路堤地基部分应变增加值较大。【关键词】低路堤；砾类土；风积沙；应力；应变【中图分类号】U416【文献标识码】Adoi:10.3969/j.issn.1007-2993.2023.04.012ResponseDifferenceofAeolianSandandGravelSoilLowEmbankmentunderVehicleLoadingLiuDapengWangJingChengQiangqiangLiuMengxi(JiangsuVocationalInstituteofArchitecturalTechnology,Xuzhou221116,Jiangsu,China)【Abstract】Aeoliansandandgravelsoilarecommonlyusedassubgradefillersinoasis-desertareaofXinjiang.Inordertofindoutthedifferenceofstressandstrainresponseoflowembankmentofaeoliansandandgravelsoilundervehicleloading,1:1fullscalemodelsoflowembankmentwereestablishedbyusingaeoliansandandgravelsoilassubgradefillers,andthemodeltestsoflowem-bankmentunderstaticload,short-termdynamicloadandlong-termdynamicloadwerecarriedoutwiththefoundationmoisturecon-tentof18%,23%and28%respectively.Thetestresultsshowthatthestressandstrainoflowembankmentarethelargestunderlong-termdynamicload,andtheminimumundershort-termdynamicload.Understaticload,short-termdynamicloadandlong-termdynam-icload,thestressofgravelsoilandaeoliansandlowembankmentdecreaseswiththeincreaseofdepth,andtheattenuationspeedofgravelsoillowembankmentisfaster.Thereisadividingpointinthestressresponseat0....
