期刊论文

Effect of Temperature on Mechanical Behaviors of Interlayer in Slope and Failure Mechanism

中文

长江科学院院报

1001-5485

2019

36

7

64-69

10.11988/ckyyb.20171352

51374129:国家自然科学基金 51774187:国家自然科学基金 2017JJ4009:湖南省自然科学基金 2017CT5006:湖南省科技厅中央引导地方科技发展专项 2017SK2280:湖南省科技厅重点项目 17A184:湖南省教育厅重点科研项目 NHCXTD04:南华大学校级创新团队项目

本校为第一机构

为研究温度对边坡夹层力学参数的影响,以膨润土和河砂为相似材料,配制了7种不同配合比的夹层试样,采用改装了加热升温控制系统的应变直剪仪,测试含水率为10%,13%,15%的夹层试样在不同温度时的抗剪强度指标等力学参数,分析其受温度和含水率影响的变化特征及其破坏机理。研究结果表明:在温度相同时,夹层试样的黏聚力和抗剪强度随膨润土含量的减少而减小;膨润土含量较高的夹层试样,其黏聚力和抗剪强度随温度升高呈现出先急剧减小、而后缓慢减小、最后再急剧减小的变化规律,且其关系曲线随含水率的升高而逐渐趋于平缓,最后呈线性下降趋势;温度升高时,夹层试样水合力降低,引起其内部土颗粒之间的微观...

The effect of temperature on the mechanical behaviors of slope interlayer was investigated on direct shear test device with temperature control heating system.Seven interlayer specimens with different mix proportions of bentonite and river sand at varied moisture content (10%,13%,15%) were prepared for the test.The shear strength indexes of slope interlayer specimens at different temperatures were measured to further examine the failure mechanism.Results demonstrated that at a given temperature,cohesion and shear strength of interlayer specimen...