固结比对石灰土动力特性的影响试验研究  

Experimental research on influence of consolidation ratio on dynamic characteristics of lime-treated soil

作　　者：白颢[1] 孔令伟[1] 

机构地区：[1]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,武汉430071

出　　处：《岩土力学》2009年第6期1590-1594,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.40772185);中国科学院知识创新工程重要方向项目(kzcx2-yw-150);岩土力学与工程国家重点实验室资助项目(No.SKLZ0803)

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.

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 

分 类 号：TU443[建筑科学—岩土工程]