一、建议公路工程设计准则使用的公路土分类表(简称分类表,下同)主要为公路路基路面(尤其是路基)的设计、施工、养护服务,包括基本分类、亚类及专门分类三种,按使用目的之不同分别采用其中一种。一般情况下用基本分类,亚类主要用于对路基土的深入研究。包括在这里的专门分类有两种,一为路基土分组 I. It is suggested that the road soil classification table (referred to as the classification table, similarly hereinafter) used in the highway engineering design guidelines mainly includes the design, construction and maintenance services of the road subgrade, especially the subgrade, including three basic categories, sub-categories and specialized categories , According to the purpose of different use of one of them. Under normal circumstances with the basic classification, sub-category is mainly used for subsoil in-depth study. There are two types of specializations included here, one subdivision of subgrade soil