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Volume 55 Issue 6
Dec.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(6): 1240-1246.
GUO Xifeng, WANG Zhonghao, WU Xiangchao. In-situ Experimental Study on Bearing Characteristics of Deep-Buried Tunnel Anchorage in Fractured Rock Mass[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1240-1246. doi: 10.3969/j.issn.0258-2724.20191077
Citation: GUO Xifeng, WANG Zhonghao, WU Xiangchao. In-situ Experimental Study on Bearing Characteristics of Deep-Buried Tunnel Anchorage in Fractured Rock Mass[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1240-1246. doi: 10.3969/j.issn.0258-2724.20191077
shu

In-situ Experimental Study on Bearing Characteristics of Deep-Buried Tunnel Anchorage in Fractured Rock Mass

doi: 10.3969/j.issn.0258-2724.20191077
  • Received Date: 26 Nov 2019
  • Rev Recd Date: 23 Mar 2020
    • Available Online: 02 Jul 2020
  • Publish Date: 15 Dec 2020
    Abstract
  • In order to study the bearing characteristics of the deep-buried tunnel anchorage in the fractured rock mass, and in the engineering background of Luding Dadu river Bridge, according to the peak shear strength parameters of the contact surface between concrete and rock mass obtained by in-situ test, the safety factor of the anchor plug was obtained. The in-situ test results of the 1∶10 scale model anchor were introduced, and the ultimate load and strength characteristics of the model anchor were studied. Finally, the overall stability of the tunnel anchor was evaluated, and the construction proposal was put forward. The results show that the safety factor of the anchor plug is 3.48, which meets the stability requirements of the specification. The model anchor has a limit load of 7.80P （P is the design load）and the model anchor system yield load characteristic point of 5.25P.

     

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