【摘要】 基于动力测试手段针对黄土高原典型地区黄土路基试样进行了动力学参数的试验研究。结合已有成果,总结出黄土动力学参数与其主要影响因素具有如下规律:动弹性模量随含水量增大而减小,随着干密度增大而增大;阻尼比随着应变增大而增大,达到某一应变幅值后曲线变缓,趋于一个常值;动粘聚力随含水量增大而明显变小;黄土的动摩擦角当含水量低于塑限时,随含水量的增大而变小,含水量超过塑限后,基本不随含水量变化;黄土动力学参数随地区及采样点的不同而表现出较大差别。更多还原

【Abstract】 Based on the dynamic tests,the dynamic parameters of loess subgrade in the typical loess plateau area are studied in this paper.With the achievements obtained,some regularities of influencing factors are generalized as follows: dynamic modulus of elasticity decreases when moisture content increases,increases as dry density increases; damping ratio increases with the strain,but reaches a constant when strain increases to a certain value; dynamic cohesive strength decreases sharply with the increase of moisture; friction angle decreases with the increasing of moisture content when it’s under the plastic limit,while keep a constant value when moisture content is above the plastic limit; study shows that the dynamic parameters varies sharply with the sampling locations.更多还原