Comparative Experimental Study on Vibration Isolation Effect of Combined Track Bed in Metro Tunnel

Abstract

Subway line using damping fasteners, steel spring floating slab track bed, rubber vibration reduction track bed, combined track bed (damping fastener combination rubber vibration reduction track bed) and other forms of vibration isolation structure, in which combined track bed is a double-layer vibration isolation system, the rest are all single-layer vibration isolation systems. Based on the principle of vibration reduction of a double-layer vibration isolation system and the vibration test data of subway line, the vibration characteristics of double-layer vibration isolation system are analyzed and compared with the vibration isolation effect of the single-layer vibration isolation system.