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Study on failure characteristics of surrounding rock of benching excavation in loess overburden soil-rock contact zone

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Abstract

With the development of transportation infrastructure construction in West China, more and more mountain tunnels covered by loess are encountered in the construction projects. The tunnel excavation and construction cannot ignore the problem of crossing the special stratum of soil-rock contact zone. Aiming at the technical problem of tunneling under the special stratum conditions of soil-rock contact zone covered with loess, this paper uses the finite difference software FLAC3D to simulate the three-dimensional modeling numerical calculation and analysis under up-down benching excavation and construction conditions, and analyzes the failure characteristics of surrounding rock in soil-rock contact zone from three aspects: shear displacement in soil-rock contact zone, plastic zone in soil-rock contact zone and primary lining internal force.

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Funding

Supported by the social development science and technology research project of Ankang Science and Technology Bureau (No.: AK2020-SF01-2).

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Authors and Affiliations

  1. Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an, 710048, Shaanxi, China

    Niu Hongtao & Shao Shengjun

  2. Ankang University, Ankang, 725000, Shaanxi, China

    Niu Hongtao

  3. Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi’an, 710048, Shaanxi, China

    Shao Shengjun

  4. China Railway Xi’an Survey, Design and Research Institute Co., Ltd., Xi’an, 710054, Shaanxi, China

    Zou Xin

Authors
  1. Niu Hongtao
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  2. Shao Shengjun
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  3. Zou Xin
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Corresponding author

Correspondence to Shao Shengjun.

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Communicated by: H. Babaie

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Niu Hongtao is the first author.

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Hongtao, N., Shengjun, S. & Xin, Z. Study on failure characteristics of surrounding rock of benching excavation in loess overburden soil-rock contact zone. Earth Sci Inform 15, 1879–1887 (2022). https://doi.org/10.1007/s12145-022-00837-0

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  • DOI: https://doi.org/10.1007/s12145-022-00837-0

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