The additional construction cost of high risk railway tunnels produced due to the incorporation of the advance geology prediction into the tunnel construction management procedure is quantitatively analyzed, so as to learn the influence of the advance geology prediction on the tunnel construction cost and to achieve a more rational estimation on the construction cost of high risk railway tunnels. The study shows that the advance geology prediction made during the construction of high risk railway tunnels has great influence on the tunnel construction cost. It is proposed that the cost of the advance geology prediction made in the construction of high risk railway tunnels should be separated from the safe production cost and the additional tunnel construction cost produced due to the advance geology prediction should be incorporated into the standard engineering cost management system.

high risk railway tunnel, advance geology prediction, tunnel construction cost