多年冻土区铁路隔振沟隔振效果的数值分析

Numerical Analysis of the Vibration Isolation Effect of the Railway Vibration Isolating Cutting in Permafrost

研究在多年冻土地区铁路两侧设置隔振沟的隔振效果,分析隔振沟的设置的位置及深度,提出相应的工程意见。对热水地区列车运行时所引起振动沿地面传播衰减的规律进行了实测,并根据该地区的实际情况采取用数值分析的方法得到振动沿地面传播衰减的规律,将实测与数值结果进行对比,分析不同位置和不同深度隔振沟的隔振效果。结果表明:位置对隔振的作用影响不大,从减小强振动的区域及路基的稳定性角度综合考虑,建议在3m处为佳;随着隔振沟深度的增大,隔振的效果逐渐增强,但增大的幅度不大。

The paper studies the isolation effect of isolating cutting dug on the two sides of the railway track in permafrost areas, analyzes the location and depth of the isolating cutting, puts forward the corresponding engineering measurements; uses the numerical analysis method to generate the vibration spread and attenuation rule along the ground caused by train in Reshui area, compares the measurement with the numerical calculation, analyzes the isolation effect of different positions and different depths, and concludes that the position of the cutting is not important for the vibration isolation, suggests that 3 m away from the railroad is the best position, the isolation effect increases with the cutting depth but not much.