利用“建筑”和“铁路”二种抗震设计规范 ,对南京地铁 1 #线区间隧道地基进行了地震液化判别 ,发现两者有差异。详细分析了两规范对贯入点深度、粘粒含量、上覆非液化土层厚度、地下水位等影响因素的不同考虑 ,认为不同的上覆非液化土层的考虑是导致差异的最大原因 Based on the two seismic design codes “construction” and “railway”, the seismic liquefaction of the tunnel foundation in the section 1 of Nanjing Metro Line was carried out and found to be different. This paper analyzes in detail the different considerations of the two factors on the penetration depth, clay content, overlying non-liquefiable soil layer thickness, groundwater level and other factors. It is considered that the consideration of different overlying non-liquefiable soil layers is the biggest reason for the difference