Abstract
ABSTRACT Many underground railway lines consist of twin tunnels. The accurate prediction of ground-borne vibration levels is thus essential for this situation. This study investigates the train’s axle load and train's speed effect on the ground surface vibration response while two trains passed each other in the opposite direction in the twin subway tunnels. Firstly, a 3D finite element (FE) model of a twin circular tunnel in a homogeneous soil is developed and verified by the previous analytical studies. Then, sensitivity analyses are performed to assess the effect of train's speed and axle load on the ground surface response. The achieved results show that an increment of the train's speed in both tunnels causes increment PPV (Peak Particle Velocity) at the ground surface, but increasing the speed of one of the trains respect to the other one has a considerable influence on surface vibrations. The vibrations are increased about 2 dB and 3.5 dB by doubling the speed of both trains and one of the trains, respectively. Vibrations level at the ground surface is enhanced with increasing both trains axle load, but the ground surface vibrations are more sensitive to the difference between two trains axle load.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
