粗颗粒含量对川西混合土抗剪强度的影响研究

混合土广泛分布在四川西部地区，由其构成的山区公路路基的稳定性是实际工程中亟需关注的问题。为此，针对不同坡高的十处崩坡积混合土作为研究对象，选取川西山区路基填筑用的天然混合土，基于大型直剪切试验，系统研究了粗颗粒含量对混合土剪应力-位移曲线和内摩擦角的影响规律，并从宏微观角度分析了抗剪强度在不同区间内的主要影响因素。

Study on the Effect of Coarse Particle Content on Shear Strength of Mixed Soil in Western Sichuan

Mixed soil is widely distributed in the west of Sichuan and the stability of the highway subgrade made up of mixed soil in mountainous areas is an issue needing urgent attention in the practical engineering. This paper aims at the study of ten collapsed and mixed soils with different slope heights, natural mixed soil used in subgrade filling in mountain areas of Western Sichuan was chosen and used large direct shear tests to systematically conduct researches on the influence law of the content of coarse particles on the shear stress-displacement curve and the internal friction angle of mixed soil. The main influencing factors in the different ranges of shear strength are then analyzed from macro and micro view.