固结比对改性膨胀土动力特性影响的试验研究  

Experiment and Rsearch on Influence of Consolidation Ratio on Dynamic Characteristics of Expansive Soil

作　　者：高春华[1] 张庆伟[1] 

机构地区：[1]安阳师范学院建筑工程学院,安阳市455000

出　　处：《公路》2010年第8期206-209,共4页Highway

基　　金：河南省教育厅自然科学基金;项目编号2009B130001

摘　　要：以改性膨胀土为研究对象,结合铁路路基实际固结状态,考虑了不同固结比对石灰改性膨胀土动力特性的影响。通过振动三轴试验,对掺灰比为5%石灰改性膨胀土,在选定的5组固结比下表现出的动力特性进行了试验研究,得出了固结比的变化对其产生的影响。在研究的固结比范围内,随着固结比的增大,改性膨胀土的动弹模量也显著地增大;阻尼比则相应地出现减小的趋势,但所受影响程度较之动弹模量略小。On ences of different the basis of the uneven consolidated condition,the expansive soil is studied,the influconsolidation ratios on dynamic characteristics of expansive soil are considered. Through dynamic triaxial test,dynamic characteristics of 5 % lime-treated expansive soil under 5 selected consolidation ratios are studied, the impacts of various consolidation ratios 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：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]