Present day activity of the Shenzhen fault zone and its impact on the safety of a planned diversion tunnel in Shenzhen, China

In this paper, after a study of present activity of Shenzhen fault zone, a numerical simulation of present three-dimensional tectonic stress field is made to calculate the angle enclosed between the maximum horizontal principal compressive stress and the tunnel axis. The tectonic stress states of four sectors at a depth of 200–250 m of the tunnel path and the present displacement rate of the Shenzhen fault zone where the tunnel is planned to pass are also estimated by the modeling. Such data are considered necessary for the safety of the diversion tunnel construction.