EVALUATION OF CRITICAL SPEEDS OF TRAINS IN IMMERSED TUNNELS

Abstract

The advantages of building a tunnel from lower sections through the Nevelskoy Strait are considered. The problem of increasing the impact of the rolling stock on the tunnel design when critical speeds are achieved is described. t is noted that in weak soils the critical speed is determined by the speed of propagation of Rayleigh surface waves. In the course of the work, it was noted that when critical speeds are reached, a significant increase in the dynamic impacts on the soil foundation is possible. A technique for calculating the tunnel for determining the critical velocities using the Fourier transform and the theory of residues is presented. An example of determining the critical speeds of the load movement using the presented methodology is considered. It is concluded that, at present, the critical speeds of the movement of the load are achievable