固结比对石灰土动力特性的影响试验研究

英文篇名：Experimental research on influence of consolidation ratio on dynamic characteristics of lime-treated soil
中文刊名：岩土力学
英文刊名：Rock and Soil Mechanics
作者：白颢 ; 孔令伟
英文作者：BAI Hao ; KONG Ling-wei(State Key Laboratory of Geomechanics and Geotechnical Engineering ; Institute of Rock and Soil Mechanics ; Chinese Academy of Sciences ; Wuhan 430071 ; China)
中文关键词：石灰土 ; 膨胀土 ; 动力特性 ; 固结比 ; 偏应力 ; 阻尼比 ; 动弹模量
英文关键词：lime-treated soil ; expansive soil dynamic characteristics ; consolidation ratio ; deviator stress ; damping ratio ; dynamic modulus
出版日期：2009-06-10
机构：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
年：2009
期：06
出版单位：岩土力学

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。
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.

引文

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