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Volume 46 Issue S1
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WU Peng, CHEN Jian, CUI Lan, XU Chen. Model tests and bearing characteristics of composite lining of tunnel[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S1): 102-106. DOI: 10.11779/CJGE2024S10019
Citation: WU Peng, CHEN Jian, CUI Lan, XU Chen. Model tests and bearing characteristics of composite lining of tunnel[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S1): 102-106. DOI: 10.11779/CJGE2024S10019
shu

Model tests and bearing characteristics of composite lining of tunnel

  • 1.

    State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    Hubei Key Laboratory of Geo-Environmental Engineering, Wuhan 430071, China

  • 4.

    China-Pakistan Joint Research Center on Earth Sciences, Islamabad, Pakistan

  • 5.

    National-Local Joint Engineering Research Center of Underwater Tunneling Technology, Wuhan 430063, China

  • 6.

    China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China

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  • Received Date: April 29, 2024
    Graphical Abstract
    • Abstract
  • The mountain tunnels in China often use composite lining support. To explore the bearing characteristics of the composite lining to guide the design of the mining method tunnel is of great significance. A large tunnel structural model test system is designed to carry out large-size model tests on the unsurported, spray-anchor combined support and composite lining support. The whole process of tunnel damage is monitored, and the damage modes of tunnels under different forms of support and the stress characteristics of the support structure are analyzed so as to reveal the bearing characteristics of composite lining. The results show that the composite lining support increases the design bearing capacity by 33.3% compared with the combined spray-anchor support. Under the two forms of support, the surrounding rock can withstand about 60% ~ 75% of the external load, and after its application, the secondary lining can share about 15% ~ 80% of the pressure of the surrounding rock. The combined spray-anchor support can better use the effects of anchors compared to the composite lining.
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    • References (6)
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