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REN Wen-feng, GAO Xuan, WANG Xing-hua, TU Peng. Deformation rule and mechanical characteristic of tunnel in water-rich full-weathering granite area[J]. Journal of Traffic and Transportation Engineering, 2013, 13(2): 34-41. doi: 10.19818/j.cnki.1671-1637.2013.02.005
Citation: REN Wen-feng, GAO Xuan, WANG Xing-hua, TU Peng. Deformation rule and mechanical characteristic of tunnel in water-rich full-weathering granite area[J]. Journal of Traffic and Transportation Engineering, 2013, 13(2): 34-41. doi: 10.19818/j.cnki.1671-1637.2013.02.005
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Deformation rule and mechanical characteristic of tunnel in water-rich full-weathering granite area

doi: 10.19818/j.cnki.1671-1637.2013.02.005
  • 1.

    School of Civil Engineering, Central South University, Changsha 410075, Hunan, China

  • 2.

    CCCC Road and Bridge International Co., Ltd., Beijing 100027, China

  • 3.

    Zhongjiao Tongli Construction Co., Ltd., Xi'an 710075, Shaanxi, China

More Information
  • Author Bio:

    REN Werrfeng(1976-), male, senior engineer, doctoral student, +86-731-82656715, wenfeng_ren@hotmail.com

    WANG Xing-hua(1957-), male, professor, PhD, +86-731-82655489, xhwang@mail.csu.edu.cn

  • Received Date: 2012-11-26
  • Publish Date: 2013-04-25
    Abstract
  • Undisturbed soil was drilled for soil test by using geological drilling rig above the tunnel center line. The settlements of tunnel surface and vault were measured by using electronic level. Tunnel horizontal convergence values were measured with JSS30A digital convergence instrument. Pressures among surrounding rock and initial support, initial support and secondary lining were measured with JTM-V2000D vibrating wire pressure gauge. The surrounding rock deformation and pressure of Zhaizigang Tunnel were measured, the surrounding rock deformation rule and mechanical characteristic of tunnel in water-rich full-weathering granite area were got. Analysis result shows that the dividing line of deep and shallow submersion tunnels is 2 times tunnel diameter. Vertical displacement and horizontal displacement appear simultaneously in tunnel entrance. The horizontal convergence stability time of surrounding rock and settlement stability time of vault have little relationship with tunnel depth. The horizontal convergence value and vault settlement increase with the increase of shallow submersion tunnel depth, but they have little relationship with the depth of deep submersion tunnel. Pressures are evenly distributed between surrounding rock and initial support, pressure difference among measurement points of shallow submersion tunnel is little, pressure gradually increases with the increase of tunnel depth. The uneven degree of pressure distribution increases for deep submersion tunnel, pressure value changes very little with the increase of tunnel depth. The pressure between surrounding rock and initial support is greater than that between initial support and secondary lining, the maximum pressure between initial support and secondary lining is not greater than 100 kPa.

     

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