刘亚明, 张翛, 谷天峰, 段丹丹, 王洪峰, 高国刚, 王帅. 2018: 车辆荷载作用下黄土路基动力学特征分析. 工程地质学报, 26(s1): 162-166. DOI: 10.13544/j.cnki.jeg.2018185
    引用本文: 刘亚明, 张翛, 谷天峰, 段丹丹, 王洪峰, 高国刚, 王帅. 2018: 车辆荷载作用下黄土路基动力学特征分析. 工程地质学报, 26(s1): 162-166. DOI: 10.13544/j.cnki.jeg.2018185
    LIU Yaming, ZHANG Xiao, GU Tianfeng, DUAN Dandan, WANG Hongfeng, GAO Guogang, WANG Shuai. 2018: ANALYSIS OF DYNAMIC CHARACTERISTICS OF LOESS SUBGRADE UNDER VEHICLE LOAD. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 162-166. DOI: 10.13544/j.cnki.jeg.2018185
    Citation: LIU Yaming, ZHANG Xiao, GU Tianfeng, DUAN Dandan, WANG Hongfeng, GAO Guogang, WANG Shuai. 2018: ANALYSIS OF DYNAMIC CHARACTERISTICS OF LOESS SUBGRADE UNDER VEHICLE LOAD. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 162-166. DOI: 10.13544/j.cnki.jeg.2018185

    车辆荷载作用下黄土路基动力学特征分析

    ANALYSIS OF DYNAMIC CHARACTERISTICS OF LOESS SUBGRADE UNDER VEHICLE LOAD

    • 摘要: 针对节能环保型公路多采取低路堤设计方案,造成部分黄土路基处于交通荷载的影响范围内,易产生路基沉降变形的现状。本文从动三轴试验角度出发,研究车辆动荷载作用下干密度、围压和频率对路基土体动力学性质的响应。研究表明:随着干密度、围压和加载频率的增大,路基土体的动弹性模量增大,且对于同一土体,随着动弹性模量的增大,阻尼比呈减小趋势。在低路堤的设计方案中,可通过适当提高黄土路基的干密度来减轻运营期间车辆荷载造成的沉降;同时,在路基设计中要以车辆动荷载频率范围的下限作为路基相关设计参数的参考。

       

      Abstract: Aiming at energy-saving and environment-friendly roads, many low embankment design schemes have been adopted, resulting in some loess roadbeds being within the influence of traffic loads, and the status of roadbed subsidence deformation is apt to occur. Starting from the perspective of dynamic triaxial tests, this paper investigates the response of dry density, confining pressure and frequency to the dynamic properties of subgrade soil under dynamic load. The study shows that the dynamic elastic modulus of subgrade soil increases with the increase of dry density, confining pressure, and loading frequency. The greater the dynamic elastic modulus of soil, the smaller the corresponding damping ratio. In the design scheme of low embankment, the settlement caused by vehicle load during operation can be reduced by appropriately increasing the dry density of the loess subgrade. At the same time, the lower limit of the frequency range of the vehicle dynamic load should be used in the subgrade design.

       

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