Impulsive forces on trains entering tunnels (IM-APT-119)

Impulsive pressures caused by high-speed. trains occur most severely when entering single-bore tunnels. Recent increases in proposed train speeds up to 150 m.p.h. suggest that this problem, hitherto tolerable, may well become acute, both for passengers in the trains and for men working in the tunnel. Impulsive pressures &re chiefly...