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2018 Vol. 24, No. 2
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Lei LIU, Xueling LIU, Jinxi ZHOU. NUMERICAL ANALYSIS ON DYNAMIC RESPONSE OF THE OBLIQUE METRO TUNNEL IN GROUND FISSURE AREA[J]. Journal of Geomechanics, 2018, 24(2): 238-243. doi: 10.12090/j.issn.1006-6616.2018.24.02.025
Citation: Lei LIU, Xueling LIU, Jinxi ZHOU. NUMERICAL ANALYSIS ON DYNAMIC RESPONSE OF THE OBLIQUE METRO TUNNEL IN GROUND FISSURE AREA[J]. Journal of Geomechanics, 2018, 24(2): 238-243. doi: 10.12090/j.issn.1006-6616.2018.24.02.025
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NUMERICAL ANALYSIS ON DYNAMIC RESPONSE OF THE OBLIQUE METRO TUNNEL IN GROUND FISSURE AREA

  • 1.

    College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China

  • 2.

    College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shannxi, China

  • 3.

    No.8 Team of Geology and Mineral Resources Bureau for Non-Ferrous Metals of Qinghai Province, Xining 810012, Qinghai, China

Received Date:  28 August 2017
Revised Date:  28 December 2017
    Abstract
  • A numerical analysis model, with an oblique crossing of 60°between horseshoe-shaped metro tunnel and ground fissure, was built with ABAQUS to study the dynamic response of the oblique metro tunnel in ground fissure area under vibration load of metro. The results show that the soil vibration near the tunnel is stronger, and the acceleration amplitude of the ground near the tunnel are greater than those far away from the tunnel. The area with strong vibration response is within 120 metres along the metro tunnel, 15 metres under the tunnel in vertical direction, and 20 metres in both sides of the tunnel. Ground fissure has a strong barrier effect on the propagation of subway vibration in the soil. The vibration of the soil below the ground fissure is stronger than that of the upper soil layer, and the vibration acceleration on the ground level of the soil nearly reduces to zero.
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