Based on Xi'an Subway Line 2

the settlement trough shape parameters are obtained by using three prediction formula to fit the measured surface settlement values. The fitting parameters and the " stiffness modification method " principle were carried out to forecast on the city wall foundation settlement induced by building subway under the city wall

meanwhile the three-dimensional finite element model of the city wall was established to do quantitative analysis of the ultimate deformation and bearing capacity. The results show that the Peck expressions can describe the character of the ground settlement well .And the ultimate settlement capacity induced of the city wall foundation shall not exceed 20 mm when considering creep and consolidation effect of the loess .This study is expected to provide a scientific reference to the ground settlement caused by underground construction and the response of buildings.