施工技术 2012年3月上 86 CONSTRUCTION TECHNOLOGY 第41卷第360期 二灰土静态三轴力学性质试验研究 徐奋强，方庆军2，陈艳丽2 (1.南京工程学院建筑工程学院，江苏南京211167； 2.河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京210098) [摘要]通过不排水三轴压缩试验对二灰土的力学特性研究，从应力应变关系、抗剪强度、围压对强度的影响以及 残余强度4个方面，分析了围压与压实度比对二灰土土体强度、变形和刚度的影响.试验结果表明，随着围压与压 实度的增加，土体的强度与刚度均增加，应力-应变特性表现为软化型.压实度增加时强度增加不明显，仅为 10% 而围压增加时强度增加幅度较大，能达到45%，峰值应力和残余应力都有所增加，围压增加时，应力-应变关 系的弹性范围增大，曲线呈弱应变软化型或理想的弹塑性. [关键词]道路工程；二灰土；三轴试验；抗剪强度；力学性质 [中图分类号]TU411.5 [文献标识码]A [文章编号]1002-8498(2012)05-0086-03 Study on Mechanics Behavior of Lime-ash Soil Under Static Triaxial Tests Xu Fenqiang' Fang Qingjun2 Chen Yanli2 (1.College of Architecture and Civil Engineering Nanjing Institute of Technology Nanjing Jiangsu 211167 China; 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:Undrained triaxial pressive tests are carried out on lime-ash soil to investigate the effect of confining pressure and degree of paction on the shear strength shear deformation.The test results show that with the increase of confining pressure and degree of paction the strength and stiffness increase and the relationship of stress-strain is the strain-softening.With the increase of degree of paction the shear strength increase is only 10% but it increases to a larger extent at 45%as the confining pressure increased and the peak stress and residual stress is increasing.The range of elasticity of stress and strain will increase when confining pressure inc...
二灰土静态三轴力学性质试验研究.pdf
