Effectiveness of Under Sleeper Pads in Insulating the Train-Induced Ground Vibrations

摘要：

　　A vehicle-track-ground model containing a fully-saturated poroelastic half-space was es tablished to investigate the insulation effectiveness of under sleeper pads (USP) to the train-in duced ground vibrations.The whole system was solved by a semi-analytical method using Fourier transforms and Fourier series.The aim of present study was to (i) investigate the effectiveness of the USP insulation to the train-induced ground vibrations at both the sub-critical and super-critical train speeds (the critical speed is defined as the Rayleigh wave speed of the ground surface), and (ii) to study the effectiveness of the USP insulation to the ground vibrations with a two-phase poro elastic soil model.The effectiveness of the USP insulation to the ground vibrations was evaluated at both the sub-and super-critical train speeds.It was found that the USP effectively reduced the free field ground vibrations at the sub-critical train speed, but the USP insulation effectiveness was much minimized at the super-critical train speed.The USP could reduce the excess pore water pres sures effectively in the ground during the passage of the train.

关键词： ground vibration insulation railway trains poroelastic ground moving load

作者: Y.Q.Cai Z.G.Cao

作者单位: Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, China Institute of Transportation Engineering, College of Civil Engineering and Architecture, Zhejiang Uni

会议类型: 国际会议

会议名称: 第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)

会议地点: 上海

会议语种:英文

页码: 390-398

在线出版日期: 2013-11-08（万方平台首次上网日期，不代表论文的发表时间）