Ground and structural deformation characteristics of metro stations constructed by the PBM method

WANG Zijun

doi:10.20265/j.cnki.issn.1007-2993.2025-0042

Volume 40 Issue 1

Feb. 2026

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WANG Zijun. Ground and structural deformation characteristics of metro stations constructed by the PBM method[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(1): 101-107. doi: 10.20265/j.cnki.issn.1007-2993.2025-0042

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WANG Zijun. Ground and structural deformation characteristics of metro stations constructed by the PBM method[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(1): 101-107. doi: 10.20265/j.cnki.issn.1007-2993.2025-0042

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Ground and structural deformation characteristics of metro stations constructed by the PBM method

doi: 10.20265/j.cnki.issn.1007-2993.2025-0042

WANG Zijun

Beijing Survey and Design Institute Co., Ltd., Beijing 100038, China

Received Date: 2025-01-22
Accepted Date: 2025-04-09
Rev Recd Date: 2025-03-12
Publish Date: 2026-02-06

Abstract

Abstract

Using the underground excavation section of a metro station in Shenyang as a case study, this research introduces the key technologies and measures for on-site construction of the PBM method. Through on-site monitoring tests, the variation laws of surface settlement, structural deformation and strain caused by the excavation process of the PBM method were studied. The findings demonstrate that the maximum final settlement of the PBM method is about 25 mm, and indicating an acceptable settlement control level. The overall structural deformation and strain are within the safe range, indicating that the overall structural layout of the PBM method station is reasonable. During the excavation and structure pouring of the negative first floor, the excavation step distance and the speed of top plate grouting should be reduced to minimize the disturbance to the overlying pipelines. When the excavation of the negative first floor reaches the central crossbeam, the excavation speed should be appropriately slowed down and temporary support should be strengthened to better control the vertical deformation of the crossbeam.
- pipe-roof beam method,
- underground excavation station of metro,
- engineering monitoring,
- surface settlement,
- structural deformation

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References

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Ground and structural deformation characteristics of metro stations constructed by the PBM method

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