Abstract
The floating-slab track is one of the best methods to reduce the vibration from the underground railway. In this paper, the rubber floating-slab track was studied. The train-track model coupled with the track-tunnel-surrounding soil model was built, which was verified by the results of the in-site test. Through this model, the quality of the rubber floating-slab track was optimized by the multi-island genetic algorithm. The optimized Z vibration level was reduced by 4.92 dB with the density of the floating slab 2306 kg/m3, the Young’s modulus of the floating slab 3.21×1010 N/m2, the density of the rubber bearing 730 kg/m3 and the Young’s modulus of the rubber bearing 9.55×108 N/m2.
Highlights
IntroductionVibration generated by underground railways is one of the most serious engineering problems
Vibration generated by underground railways is one of the most serious engineering problems.The vibration of the subway railway will result in structural vibrations and re-radiated noise [1, 2].There are many measures to control this vibration
The numerical model was divided into two sub-models
Summary
Vibration generated by underground railways is one of the most serious engineering problems. The floating slab can be continuous or discontinuous [3], which mainly can be supported by rubber bearings or steel-springs. Bay Area Rapid Transit (BART) system, the discontinuous floating-slab track was used, which was supported by rubber pads [5]. Lei and Jiang [15] build the finite element model of the steel-spring floating-slab track to analyze the effectiveness of vibration reduction. OPTIMIZATION OF VIBRATION REDUCTION OF THE RUBBER FLOATING-SLAB TRACKS. Saurenman and Phillips [5] tested the rubber floating-slab track used on the current San. Francisco Bay Area Rapid Transit (BART) system.
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