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

GUO Xifeng; WANG Zhonghao; WU Xiangchao

doi:10.3969/j.issn.0258-2724.20191077

Volume 55 Issue 6

Dec. 2020

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Journal of Southwest Jiaotong University > 2020 > 55(6): 1240-1246.

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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

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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

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.
- tunnel anchorage,
- scaled model experiment,
- bearing characteristic,
- safety factor

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References(12)

References

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