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Pressure from surrounding rock of three shallow tunnels with large section and small spacing

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Abstract

With the increasing traffic demand, the closely built three or more tunnels with large section play a significant role in the tunnel construction. However, the interaction among tunnels has important influences on the security and economy of tunnel engineering, and the calculation of pressure from the surrounding rock during the excavation is one of the problems that need to be solved urgently. Based on the practical engineering of three tunnels, the load model of three tunnels was proposed in consideration of the interaction and excavation sequence between tunnels. In comparison with the load model of single tunnel, the construction mechanical characteristics of the three tunnels were analyzed. The results show that the rock pressure of three tunnels calculated by the current tunnel design code is not reliable, and the interaction force increases with the spacing between tunnels.

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Xiao-li Yang  (杨小礼), Qi-yun Jin  (金启云) & Jun-qiu Ma  (马军秋)

Authors
  1. Xiao-li Yang  (杨小礼)
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  2. Qi-yun Jin  (金启云)
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  3. Jun-qiu Ma  (马军秋)
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Corresponding author

Correspondence to Xiao-li Yang  (杨小礼).

Additional information

Foundation item: Project(2011CB01380) supported by the National Basic Research Program of China; Project(51178468) supported by the National Natural Science Foundation of China; Project(2011G013-B) supported by Science and Technology Development of Railways Department in China

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Yang, Xl., Jin, Qy. & Ma, Jq. Pressure from surrounding rock of three shallow tunnels with large section and small spacing. J. Cent. South Univ. 19, 2380–2385 (2012). https://doi.org/10.1007/s11771-012-1285-x

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  • DOI: https://doi.org/10.1007/s11771-012-1285-x

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