Abstract:

A running tunnel of Wuxi Mero Line 1, which crosses the downtown area of the city, is bored by shield machines. There are lots of buildings in the congested site and the geology conditions are complex. The settlement of the buildings occurring during the shield tunneling is predicted by finite element FLAC2D method and Peck theory. The results of the numerical analysis and the prediction by Peck theory indicate that the ground surface settlement and the inclination of the buildings meet the requirements of relevant standards and that the shield tunneling is safe.

Key words: soft soil, shield, settlement, FLAC2D, Peck theory