Excavation entirely on subway tunnels in the central area of the People’s Square

With the rapid development of the state economy and acceleration of urbanization, many domestic big cities are facing problems such as land limitation, population expansion, traffic jam, environment pollution et al. which restrict the continuable development of the cities. To exploit the underground space can find new space for the continuable development of the city, and to develop the rail traffic is an effective way for solving the problem of traffic jam.