Construction Technique of Vertical Shafts Excavation Above Subway Tunnel

Abstract

Taking the foundation pit construction of the section K0 + 700 ~  + 900 of Shuangjiehe Road, Tinghai Road and other underground roads in Qianhai District of Shenzhen as an example, this paper introduces a new key construction technology of deep and large foundation pit excavation in the coastal area of reclamation to control the uplift and deformation of underground subway, which effectively utilizes the principle of space–time effect. Based on the number of finite difference software FLAC 3D numerical analysis, the skip excavation method and key construction parameters are simulated and optimized. The monitoring data show that the excavation method, sequence and construction protection measures have significant effect on the deformation control of subway tunnel, which can provide reference for similar projects.

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Acknowledgements

The authors gratefully acknowledge the financial support from the Natural Science Foundation of China (Grant No.: 41472259). This research is also supported by National Key R&D Program of China (Grant No.: 2016YFC080250504).

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Correspondence to Bo Liu.

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Liu, B., Li, H., Li, L. et al. Construction Technique of Vertical Shafts Excavation Above Subway Tunnel. Geotech Geol Eng (2021). https://doi.org/10.1007/s10706-021-01753-8

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Keywords

  • Foundation pit excavation
  • Underlying tunnel
  • Vertical shafts
  • Construction technology