建国以来工程地质工作及路基工程有较大发展,通过多年的具体实践与理论探讨,学术水平有所提高,现概述如下: 工程地质野外测绘方法除沿用传统的直观法获得必要的资料外,近年来在选线中,特别对重点工程的大面积调查,已逐步运用地质力学观念和理论,研究地应力场,追索地质构造,掌握地层的受力特点及其对工程建筑物的影响。利用赤平极射投影的原理,分析各种结 Since the founding of the PRC, the engineering geological work and subgrade construction have made great progress. Through years of practice and theoretical discussions, the academic standards have been improved. The general descriptions are as follows: In addition to using the traditional visual method to obtain the necessary information, In the line selection, especially for large-scale survey of key projects, we have gradually applied the concepts and theories of geomechanics to study the geostress field, trace the geological structure, and grasp the force characteristics of the stratum and its impact on the engineering buildings. Using the principle of the polar flat projection, the analysis of various knots