This article mainly emphasize on the classification of coarse grained soil from the viewpoint of engineering application ( content of coarse grains ) , vibrating method is introduced in the shaping . meanwhile , research is made to the water stability and shear strength . through research , following conclusions are obtained : coarse grained gradation is the main factors to determine its shear strength , when the coarse grains content is over 70 % or around , the maximum shear strength appears : the grains itself have a bigger effect on the shear strength 以往對粗粒土的研究方法多采用擊實法,很少有人研究其抗剪強度特性,本文主要從工程應(yīng)用的角度(粗粒含量)對粗粒土進行工程分類,成型方法采用振動法,同時對水穩(wěn)定性、抗剪強度特性進行研究,通過研究得出以下結(jié)論:顆粒組成級配特性是決定其抗剪強度的主要因素,當粗粒含量在70左右時,抗剪強度最大;顆粒本身的特性對抗剪強度影響較大,顆粒越堅硬、大小顆粒相差越大、越不均勻、顆粒形狀越呈棱角狀、填筑密度越大,抗剪強度就越高;含水量對抗剪強度的影響很小,可以忽略不計。