Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (3): 432-439.DOI: 10.12068/j.issn.1005-3026.2023.03.017

• Resources & Civil Engineering • Previous Articles     Next Articles

Excavation Field Test and Parameters Optimization of the Transverse Pilot Tunnel with Small Diameter Tube Curtain Construction Method

ZHAO Wen 1, SUN Yuan1, BAI Qian1, XIA Yun-peng2   

  1. 1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China;2.The Fifth Department of China Railway No.4 Bureau Group Co.,Ltd.,Jiujiang 332000,China.
  • Revised:2022-01-07 Accepted:2022-01-07 Published:2023-03-24
  • Contact: SUN Yuan
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Abstract: Shifudalu station of Shenyang Metro is constructed by small diameter tube curtain construction method. The influence of the excavation of the transverse pilot tunnels on the surface settlement and vault deformation was firstly analyzed by on-site monitoring, and then the three-dimensional model of station structure was established by Midas GTS NX. The accuracy of the model was verified by comparing with on-site monitoring data, and the influence of the number of transverse pilot tumels and the construction sequence on the surface settlement was finally analyzed. The results show that the stratum loss rate caused by the excavation of the transverse pilot tunnel is 0.08%, and the pipe curtain structure can effectively restrain the surface settlement. Compared with other excavation schemes, it’s better to excavate from side tunnel to central tunnel, which can effectively reduce the surface settlement by 24.7%. The difference in surface settlement is only 8% when the number of excavated transverse pilot tunnels is five to seven. Compared with the construction scheme of seven transverse pilot tunnels, the construction of four and three transverse pilot tunnels can reduce surface settlement by 18.0% and 28.3%, respectively.

Key words: small diameter tube curtain construction method; numerical simulation; transverse pilot tunnel; land subsidence; parameters optimization

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