粤北地区花岗岩残积土的物理力学特性

采用数理统计方法对广连高速公路花岗岩残积土的物理力学指标进行统计，并分析特性参数的相关性。结果表明:粤北地区花岗岩残积土为具有显著地域差异性的结构性土，多为砾质黏性土；颗粒组成呈“两头大、中间小”的分布特征，具有以稍密、硬塑、中等压缩性、较高抗剪强度为主的典型特点；物理指标之间的相关性显著，力学指标与物理指标的相关性不显著，可为粤北地区花岗岩分布区公路建设提供参考。

Physical and Mechanical Properties of Granite Residual Soil in Northern Guangdong Province

The physical and mechanical indexes of granite residual soil in Guanglian expressway have been statistically analyzed by mathematical statistics method, and the correlation of characteristic parameters has been analyzed. The results show that the granite residual soil in northern Guangdong is a structural soil with significant regional differences, most of which are gravel clay soil. The particle composition of the soil has feature of "large ends and small in the middle", with typical characteristics of slightly dense, hard plastic, medium compressibility and high shear strength. The correlation between physical indexes is significant, but the correlation between mechanical indexes and physical indexes is not significant. It can provide reference for highway construction in granite distribution area in northern Guangdong province.