土体工程地质层组的划分

工程地质岩组的划分是岩体质量评价的基础。当大型工程揭露土层很多时，进行土体工程地质层组的划分亦是十分必要的。它可以更为清晰的反映场地地质结构的变化规律，便于地质模型的概化和参数研究，有助于抓住主要工程地质问题进行评价，便于设计师的理解和应用。以南京地铁南北线一期工程为例，探讨了土体工程地质岩组的划分问题。通过以层组为基础的参数离散性统计、工程地质模型与工程地质问题的分析可以看出该层组划分方案的合理性与工程意义。

The division of engineering geological strata groups of soil mass

It is well known that the correct division of engineering geological strata groups of rock mass is the basis of rock mass quality evaluation. When many soil layers were revealed, especially in large projects, it is necessary to divide the engineering geological strata groups of soil mass either. The division is helpful to show the geological structure of the site more clearly, make it convenient to generalize the engineering geological model and study geotechnical parameters on the basis of the model and is helpful to capture and evaluate the primary engineering geological problems. Furthermore, it is easier for the architects to understand and to apply to. Taking the Nanjing Metro for example, the issues of the division are discussed. Through the statistics of discrete data acquired from the divided strata groups and analyses on the engineering geological models and problems, the rationality and significance of the division is noticeable.