DOORWAY OF TUNNEL FOR HIGH-SPEED TRAINS Russian patent published in 1995 - IPC

FIELD: railway transport. SUBSTANCE: doorway of tunnel for high-speed trains includes retaining wall with unit of tunnel lining on its internal side, and entrance part of doorway in form of tunnel-like section on the opposite external side of front slope. Doorway entrance part consists of side walls and roofing and has section larger than tunnel section at its beginning and section equal to that of tunnel at its end. Besides, tunnel-like section is trapezoidal in horizontal section. Side walls of tunnel-like section have through windows with turning solid flaps having springing returning members. Such a construction provides for smooth cushioning of impact of air wave of high-speed train entering the tunnel and comfort for passengers. EFFECT: higher efficiency. 3 dwg