采用自行研制的大型剪切仪 ,对 2种风化石粒料进行了直接剪切试验研究 ,分析了粒料级配、粗集料含量、最大粒径以及小于 0 .6 mm颗粒含量对风化石抗剪强度参数的影响。结果表明 ,风化石粒料的 φ值受粗集料含量 (R4 .75)的影响较大 ,且 φ存在最大值 ,强度高的粒料其 φ值亦高 ;粒料的 C值则与小于 0 .6 mm颗粒含量有较好的相关性 Direct shear tests on two types of feldspathic gravel pellets were carried out by using a large-scale shearing machine developed by ourselves. The effects of grading, coarse aggregate content, maximum particle size, and particle size less than 0.6 mm on fouling stone Effect of shear strength parameters. The results show that the φ value of the aerated forages is greatly influenced by the content of coarse aggregate (R4 .75), and the maximum value of φ exists. The high strength pellets also have high φ values. The C values ​​of the pellets are less than 0 .6 mm particle content has a good correlation