Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (5): 1452-1462.doi: 10.13278/j.cnki.jjuese.20210079

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Numerical Study on Ground Surface Vibration Response Under Train Load in Multi Adjacent Tunnels

Lu Dechun, Ma Yiding, Wang Guosheng   

  1. Institute of Geotechnical and Underground Engineering, Beijing University of Technology, Beijing 100124, China
  • Received:2021-06-09 Online:2021-09-26 Published:2021-09-29
  • Supported by:
    Support by the National Natural Science Foundation of China (51908010, 52025084) and the Beijing Municipal Natural Science Foundation (8204055)

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Abstract: In view of the increasing number of parallel and overlapping cases of underground tunnels and the unknown ground vibration law under the coupled load of subway and high-speed railway trains, the authors established a three-dimensional numerical analysis model of a large diameter shield tunnel under passing a double-line subway tunnel, and brought in a rigid train model and a track model based on the existing operating train parameters. The Hertz contact was used to simulate the contact between a moving train wheelset and a rail, the nonlinear contact between tunnel and surrounding rock was simulated by penalty contact and hard contact, and the infinite half space was simulated by using an infinite artificial boundary. By using the time domain explicit global analysis method, the operation of the running train in the tunnel was simulated and compared with the measured ground acceleration results, and the time-frequency characteristics of the vertical acceleration under the operation of single-line subway train and single-line high-speed train, as well as the distribution law of the surface acceleration under complex operating conditions were analyzed. The results show that the numerical model established in this study can better reflect the vibration response of the ground when the subway train is running.

Key words: environment vibration, explicit global analysis in time domain, parallel tunnel, overlap tunnel, dynamic response

CLC Number: 

  • TB533.2
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