【摘要】 以石灰改性膨胀土为研究对象,结合铁路路基实际的非等向固结状态,考虑了不同固结比或偏应力对石灰改性膨胀土动力特性的影响。通过循环振动三轴试验,对掺灰比为3%石灰改性膨胀土,在选定的6组固结比下表现出的动力特性进行了研究,得出了固结比或偏应力的变化对其产生的影响。在研究的固结比范围内,随着固结比和偏应力的增大,石灰土的动弹模量显著地增大;阻尼比则相应地表现出减小的趋势,但所受影响程度较之动弹模量略小。更多还原

【Abstract】 Based on the uneven consolidated condition,the lime-treated expansive soil is studied,the influences of different consolidation ratios and deviator stresses are considered.Through dynamic triaxial test,dynamic characteristics of 3 % lime-treated expansive soil under 6 selected consolidation ratios are studied;the impacts of various consolidation ratios and deviator stresses on it are concluded.In the range of analyzed consolidation ratio,the dynamic modulus of lime-treated soil increases markedly as long as consolidation ratio and deviator stress increase.The damping ratio is influenced by consolidation ratio as well;but the impact on damping ratio is less than that on dynamic modulus.更多还原