﻿ 地铁运行时连续屏障隔振效果数值分析

# 地铁运行时连续屏障隔振效果数值分析Numerical Analysis on the Vibration Isolation Effect of Continuous Barrier under Subway Loads

Abstract: 3D finite element model of soil-tunnel-barrier was established by ANSYS 14.0 under the back-ground of certain four-holes overlapping multi-tunnels of Wuhan metro line 2 and line 4. The iso-lation effect of continuous barrier when subway operates; and the relationship between isolation effect and width of barrier, depth of barrier, as well as stiffness of barrier were analyzed. The results showed that an enlarged vibration region existed in front of barrier when continuous barrier was set; the barrier width was different, and the vibration isolation effect was also different; the isolation effect was enhanced if the width of barrier increased; the isolation effect was obvious if the depth of barrier increased, but the isolation effect was not obvious with increasing depth of barrier when barrier depth was deeper than vibration sources; the isolation effect of open trench was the best, the second was foam barrier plate, and the last was concrete underground continuous wall.

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