干密度对滑带土抗剪特性影响研究

Study on the Influence of Dry Density on Shear Properties of Soil with Coarse Sliding Zone

利用经过可视化改造后的有机钢化玻璃制成的剪切盒,来探究干密度对滑带土抗剪特性的影响,研究中发现滑带土的内摩擦角随着干密度的增长而不断变大,同时随着法向应力增加,干密度对土样的抗剪强度的影响逐渐变大。使用高清数字视频录制设备录制直接剪切的试验过程,再结合Image-Pro Plus软件从微观层面分析剪切破坏面及其上部土体中粗颗粒的位移变化。从试验得知,剪切过程中粗颗粒在剪切过程中发生平移、翻滚和错动,且通过分形特性研究得知滑带土的土样颗粒均匀性好。

The shear box made of organic tempered glass after visual transformation is used to explore the effect of dry density on the anti-shearing characteristics of coarse-grained slip belt soil,and it is found that the internal friction angle of the slip belt soil becomes larger with the growth of dry density,and the influence of dry density on the strength of soil-like shear gradually increases with the increase of normal stress.Use a high-definition digital video recording device to record a direct cut test process,combined with Image-Pro Plus software,to analyze at a microscopic level the displacement changes of the shear damage surface and the coarse particles in its upper body.It is learned from the experiment that the coarse particles in the shearing process pan,roll and misalt,and the soil particle uniformity of the sliding belt soil is good through the study of the form characteristics.