Settlement simulation of soft clay in the subway under dynamic load based on Midas GTS NX

The subway has become the main way for people to travel nowadays. saturated soft clay area a large population and construction is most extensively distributed. foundation will settle under dynamic load of train, which affect service life structural safety. To study settlement characteristics subway, three-dimensional finite element model was established based on software Midas GTS NX, normal design speed (80 km/h) high-speed (120 were compared analyzed. research results show that higher train speed, larger lateral influence range surface trough, but decreases with increase running speed. line after one year operation about 45mm, 20 years 58mm. growth rate prediction curve gradually, increment very small long time in later period operation.