Volume 36 Issue 6
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Hu Shiming, Yang Weihong, Li Tao, Li Xinkun. Deformation Law Analysis of Bedding Slope at Entrance of Highway Tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(6): 477-482. doi: 10.3969/j.issn.1007-2993.2022.06.010
Citation: Hu Shiming, Yang Weihong, Li Tao, Li Xinkun. Deformation Law Analysis of Bedding Slope at Entrance of Highway Tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(6): 477-482. doi: 10.3969/j.issn.1007-2993.2022.06.010
shu

Deformation Law Analysis of Bedding Slope at Entrance of Highway Tunnel

doi: 10.3969/j.issn.1007-2993.2022.06.010
  • 1.

    China University of Mining and Technology-Beijing, School of Mechanics and Civil Engineering, Beijing 100083, China

  • 2.

    MCC Construction Research Institute Co., Ltd., Beijing 100088, China

  • Received Date: 2021-12-10
  • Publish Date: 2022-12-08
    Abstract
  • The geological conditions of the bedding slope at the entrance of the tunnel are complicated, and it is easy to cause the landslide deformation of the side slope and the inverted slope during excavation. The construction process of right line outlet section of Moziping tunnel was monitored, and the deformation characteristics of the lining and the failure mode of the slope were analyzed. The effectiveness of the reinforcement measures was also evaluated. The results show that the deformation of upper soil and surrounding rock in the tunnel increases gradually with the construction, and the deformation of monitoring points increases sharply during the excavation of the section. The displacement at the junction of upper soil and soil rock is obviously greater than that of bedrock, which has the risk of bedding landslide. The deformation of tunnel arch shoulder and arch crown is the largest, and the support needs to be strengthened. After the bedding slope enters the bedrock and the inverted arch is closed, the deformation of the slope and tunnel surrounding rock gradually tends to be stable. The study can provide practical experience for the slope excavation construction of tunnel portal section.

     

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