地震工程学报Issue(2)：239-242,4.DOI:10.3969/j.issn.1000-0844.2014.02.0239
压实黄土强度的三轴试验研究
Triaxial Testing of the Compacted Loess Strength
摘要
Abstract
Strain-controlled triaxial unconsolidated and undrained shear tests were used to study the strength of compacted loess from the Qinghai region.The tests were conducted at moisture contents of 14% and 17% at 97% compaction,and 95% and 96% compaction at moisture content of 17%.The specimen diameter was 3.91 cm,and the height was 8 cm.To analyze the stress-strain behavior,the Duncan-Chang model was used.The test results suggest that the deviator stress increases as the axial strain increases at different confining pressures regardless of initial moisture and compaction.The relationship between deviator stress and axial strain is close to hy-perbolic.The deviator stress and the initial tangent modulus increase as the confining pressure in-creases.At constant confining pressure,the deviator stress at failure decreases with increasing moisture and increases with increasing compaction.With increasing moisture content,the cohesion,friction angle,K,and Rf decrease,whereas porosity n increases.With increasing compaction, the cohesion,friction angle,K,and Rf increase,whereasn decreases.关键词
压实黄土/三轴试验/邓肯-张模型/参数Key words
compacted loess/triaxial test/Duncan-Chang model/parameters分类
建筑与水利引用本文复制引用
陈伟,张吾渝,马艳霞,常立君,王萌..压实黄土强度的三轴试验研究[J].地震工程学报,2014,(2):239-242,4.基金项目
青海省科学技术厅应用基础研究计划（2012-Z-708）；国家留学基金委资助 （）
