Pipe Curtain Deformation and Surface Subsidence Caused via Excavation of Transverse Pilot Tunnel under Pipe Curtain Support

Qian Bai, Wen Zhao (), Yuan Sun and Xin Wang
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Qian Bai: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Wen Zhao: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Yuan Sun: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Xin Wang: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

Sustainability, 2023, vol. 15, issue 15, 1-14

Abstract: Relying on the Shenyang Metro Line 4 Shifu Road station, the impact of the construction parameters of the transverse pilot tunnel on the surface subsidence and the pipe curtain deformation was first studied through numerical simulation, followed by the analysis of the impact of the excavation of the transverse pilot tunnel on the deformation characteristics of the pipe curtain through on-site monitoring. The results show the following: the excavation of the middle pilot tunnel is the key stage of the construction. The excavation sequence of H2 and H4 and H6 → H1 and H3 → H5 and H7 caused the least surface subsidence. Increasing the grouting width and improving the strength of the initial support can control the pipe curtain deformation very well, and it is reasonable to choose 1.5 m as the grouting width.

Keywords: subway station; pipe curtain method; transverse pilot tunnel; excavation; deformation response (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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