INCLINED PITHEAD TYPE HOOD FOR DECREASING MICRO PRESSURE WAVES OF RAILROAD TUNNEL

摘要

PURPOSE: An inclined pithead type hood for decreasing micro pressure waves of a railroad tunnel is provided to reduce noise pollution and vibration of the way out side of a tunnel due to micro pressure waves by decreasing micro pressure waves generated when a train approaches tunnel. CONSTITUTION: The inclined pithead type hood for decreasing micro pressure waves of a railroad tunnel is installed to a way in and a way out of a railroad tunnel in the shape of an inclined pithead as an instrument for restraining the effluence of micro pressure waves from a tunnel to the air, wherein the way in is formed to have an angle of 45 degrees from the uppermost part to the ground and the way out is formed to have an angle of 15 degrees.