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中文摘要：
为了分析花岗岩残积土路堤边坡水毁的主要内在因素，依托广佛肇高速公路路堤边坡修筑，以该地区花岗岩残积土为研究对象，通过室内颗粒分析试验和直接剪切试验，在不同初始干密度条件下进行了一系列重塑花岗岩残积土的抗剪强度试验研究。试验结果表明，在一般情况下，随着初始干密度的增大，花岗岩残积土的摩擦角变化范围很小，而粘聚力值随着干密度的增大而增大，其中，粗粒土成分对摩擦角的影响较大，细粒土成分对粘聚力的影响较大。分析了剪应力一剪切位移曲线与初始干密度、颗粒成分之间的关系，并归纳了花岗岩残积土在不同垂直压力、不同初始干密度、不同颗粒成分下对抗剪强度指标的影响，试验得到的有效抗剪强度指标c＇，φ＇值可为路堤边坡的合理设计提供参考依据。
英文摘要：
In order to analyze the major internal factors granite residual soil subgrade slope failure, this article depends on Guang-Fu-Zhao highway embankment slope construction in the area of granite residual soil as the research object, through laboratory tests particle analysis, direct shear test, in different initial dry densities a series of tests on the shear strength remodeling granite residual soil. The results showed that： Under normal circumstances, with the initial dry density increases, granite residual soil friction angle variation range is small, but cohesion value as the dry density increases, wherein a greater impact on the composition of coarse grained soil friction angle. A greater impact on the composition of finegrained soil cohesion. This article analyzes the shear stress-shear displacement curve relationship with the initial dry density, particle component between vertical and summarizes the different pressures, different initial dry density on shear strength indices under different grains in the granite residual soil, effective shear strength index c＇,φ＇ results obtained, the value can provide reference for the rational design of embankment slope.
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