摘要
为研究黄土的含水率对工程力学特性的影响,以邓肯-张模型对黄土土样的室内静三轴试验数据进行拟合分析,获得其邓肯-张模型参数、弹性常数随含水率变化的规律。在黄土剪切过程中,随着黄土含水率的增加其强度迅速降低,当围压较小时表现为延性破坏;当黄土含水率大于最优含水率时,土体的剪涨现象尤为明显。
To study loess＇water content which influences its engineering mechanical characteristics, the fitted analysis is done for indoor static tri-axial test of loess sample by using Duncan-Chang model, which deduces the law that the parameters of Duncan-Chang model and the elastic constant are always changed with water content. In the process of loess shearing, higher the water content, smaller the strength and low confining pressure results in ductile fracture. The loess sample presents a distinct dilatancy phenomenon when loess＇water content is greater than the optimum water content.
出处
《港工技术》
2012年第6期66-69,共4页
Port Engineering Technology
关键词
黄土
含水率
强度
邓肯-张模型
三轴剪切试验
loess
water content
strength
Duncan-Chang model
tri-axial shear test
