寒区炭质页岩路基填料的物理力学特性研究  

Study on the physical and mechanical properties of carbonaceous shale subgrade filling in cold region

作　　者：周晏鹏 Zhou Yanpeng(Qinghai Haixi Highway Bridge Engineering Co.,Ltd.,Xining 810021,China)

机构地区：[1]青海省海西公路桥梁工程有限公司,西宁810021

出　　处：《青海交通科技》2024年第4期103-107,共5页Qinghai Transportation Science and Technology

摘　　要：为研究冻融循环下炭质页岩作为路基填料的物理力学特性,本文在青海省柴达木盆地选取炭质页岩进行室内试验,分析其在冻融循环下的物理特性。结果表明,在冻融循环后,炭质页岩的质量、波速先增加后减小,二者呈现相似的变化曲线;同时,试样在经历冻融循环后,内部出现明显裂隙,颗粒表面附着较多粉状物质,部分矿物颗粒上还出现了明显的蜂窝状孔隙;炭质页岩的抗压强度逐渐降低,强度受冻融循环影响较明显。研究成果可为青海省路基工程填料的选取提供参考。In order to study the physical and mechanical properties of carbonaceous shale as roadbed filler under freeze-thaw cycles,this paper selects carbonaceous shale in Qaidam Basin,Qinghai Province,for laboratory tests to analyze its physical properties under freeze-thaw cycles.The results show that after freeze-thaw cycles,the mass and wave velocity of carbonaceous shale increase first and then decrease,and the two show similar change curves.At the same time,after the freeze-thaw cycles,there are obvious cracks in the sample,more powdery substances are attached to the surface of the particles,and obvious honeycomb pores appear on some mineral particles.The compressive strength of carbonaceous shale gradually decreases,and the strength is obviously affected by the freeze-thaw cycles.The research results provide a reference for the selection of subgrade engineering fillers in Qinghai Province.

关 键 词：冻融循环 炭质页岩 路基填料 物理力学特性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]