摘要
研究基质吸力与含水率或饱和度的关系,对天然岸坡无堤利用具有重要意义。采用TFB-1型非饱和土应力应变控制式三轴仪,对阿勒锦岛天然岸坡非饱和原状土土-水特征曲线及变化规律进行实验研究。运用两种实验方法进行对比,采用轴平移技术控制基质吸力,用Van Genuchten模型对土-水特征曲线作拟合分析。结果表明:非饱和土体积含水率随着基质吸力的增加而递减,逐渐趋于稳定值,约为15%,当体积含水率小于15%后,非饱和土的抗剪强度将逐渐提高;整个土-水特征曲线呈现"S"形,符合经典土-水特征曲线大致趋势,且具有明显的阶段性特征。
This paper is devoted specifically to a novel experimental research arising out of the in- sight that research on the relationship between matric suction and moisture content or saturation is of sig- nificance to using the natural bank without reinforcement. The targeted research consists of using TFB-1 non-saturated soil stress strain controlled tri-axial text apparatus to define soil-water characteristic curve and variation of unsaturated undisturbed soil of the natural bank in Alejindao ; performing contrasts using two test methods; controlling matrix suction using the axis-translation technique and performing fitting a- nalysis of soil-water characteristic curve by using the model of Van-Genuchten. The results demanstrate that as the matrix suction increases, the unsaturated soil is likely to have a progressively decreasing volu- metric water content, gradually tending to a stable value of about 15% ; following the volumetric water content of less than 15%,unsaturated soil has a step-by-step increase in shear strength; the soil-water characteristic curve assumes an ＂S＂ shape, conforming to the general trend of classical soil-water charac- teristic curve and presenting obvious stage characteristics.
出处
《黑龙江科技大学学报》
CAS
2015年第2期187-191,共5页
Journal of Heilongjiang University of Science And Technology
基金
黑龙江省自然科学基金项目(E201462)
关键词
非饱和土
基质吸力
体积含水率
土-水特征曲线
unsaturated soil
matric suction
volumetric water content
soil-water characteristic curve
作者简介
周莉（1958-），女，黑龙江省宝清人，教授，博士，研究方向：岩土工程，E—mail：mengte5891@163．com。
