通过系统的室内外试验研究,提出水泥改性级配碎石基层材料,指出在级配碎石中掺入2.0%～2.5%剂量的水泥,能极大地提高级配碎石基层的强度和水稳性,并避免水泥稳定碎石基层干缩开裂、疲劳断裂、水损害等固有的缺陷。建立了一种水泥改性级配碎石基层的非线性力学模型,提出了其结构设计的方法。 Through the systematic indoor and outdoor experimental research, the cement modified graded gravel base material is proposed. It is pointed out that adding 2.0% -2.5% cement into the graded gravel can greatly improve the strength of the graded gravel base and water Stability, and to avoid the cement-stabilized crushed stone base cracking, fatigue fracture, water damage and other inherent defects. A nonlinear mechanical model of cement-modified graded gravel base was established and the method of structural design was proposed.