颗粒破碎在直剪试验中的研究

Experimental Research of Particle Breakage during the Process of Direct Shear Test

通过引入颗粒破碎指标Bg,设计8组室内土体直剪试验,研究直剪过程中颗粒的破碎随试样饱和度以及干密度的变化情况。对试验数据进行分析处理,得出以下结论:1直剪过程中土颗粒总是大颗粒减小细颗粒增加;2随着饱和度增大,颗粒破碎指标逐渐减小,并趋于稳定;3随着试样干密度增大,颗粒破碎指标逐渐增大。

By the introduction of panicle breakage index Bg, 8 groups of direct The changes of the particles breakage by the change of resaturation and dry density shear test of soil were designed. in the process of the direct shear were studied. Some conclusions are gotten from the tests. （1）In the direct shear process ,the larger particles are al- ways reduced and the fine particles are always increased. （2）The particle breakage index decrease to a certain value with the increasement of saturation. （3）The particle breakage index increase with the increasement of dry density.