Abstract:
The maximum vertical displacement of ground fissure is an important parameter to the structural design of Xian Metro Line 2 going through ground fissures.Based on leveling monitoring data,the activity characteristics in different stage of each ground fissure along Xian metro Line 2 are analysed in this paper.The future activity trend of each ground fissure is predicted.Then through the contrast analysis of the maximum vertical displacements calculated by the annual activity rate of different historical stages,the maximum vertical displacement of crossing points in which ground fissures intersect with Xian Metro Line 2 are gotten.The ground fissures along Xian Metro Line 2 are classified into four categories,i.e.Ⅰ,Ⅱ,Ⅲ and Ⅳ according to the maximum vertical displacements of ground fissures.