PERIODIC MECHANICAL RESONANCE STRUCTURE IN THE TUNNEL WALL TO REDUCE THE MICRO-PRESSURE WAVE IN THE HIGH-SPEED RAILWAY TUNNEL

摘要

PURPOSE: A resonant type periodic tunnel structure for reducing micro pressure waves in a high-speed railway tunnel is provided to reduce micro pressure waves through the interaction among the mass, rigidity, and internal space volume of a shielding member. CONSTITUTION: A resonant type periodic tunnel structure for reducing micro pressure waves in a high-speed railway tunnel comprises a tunnel wall (20) for forming a tunnel (10) and a reduction unit (30). The reduction unit is connected to the tunnel and is arranged with a shielding member to shield an internal space. Pressure waves generated by trains are reduced through the interaction among rigidity in the mass of the shielding member and rigidity related to the elasticity of air contained in the volume of the internal space. A plurality of reduction units is arranged along the inner circumference of the tunnel wall in the longitudinal direction of the tunnel.