Comparative Analysis of Support Methods for TBM Entrance Walls

Articles in Press

Document Type : Research Paper

Authors

1 Faculty of Mining Engineering, Amirkabir University of Technology, Tehran, Iran.

2 Faculty of Geo-Data Science, Geodesy, and Environmental Engineering, AGH UST, Krakow, Poland.

3 Faculty of Civil Engineering, Yildiz Technical University, Istanbul, Turkey.

4 Faculty of Civil Engineering, Southwest Jiaotong University, Sichuan, China.

10.22059/ijmge.2025.369905.595132

Abstract

The excavation and construction of underground stations are essential elements of modern urban infrastructure. This research article delves into the critical aspect of station construction within underground transportation systems, focusing specifically on stabilizing entrance walls of a metro station, particularly for Tunnel Boring Machine (TBM) entrances. The study conducts a comparative analysis between two support systems: the plastic concrete piles method and its combination with soil nailing, evaluating their efficacy in the context of TBM entrances. Employing both 2D and 3D Finite Element Modeling (FEM), the research investigates various soil constitutive models, including the Hardening Soil and Hardening Soil with Small Strain models. The findings emphasize the combined approach of utilizing plastic concrete piles with soil nailing as more advantageous, demonstrating superior displacement control. Additionally, the comparison of modeling approaches indicates that the utilization of 3D modeling with the Hardening Soil with Small Strain model is recommended for numerical analysis of deep excavations near sensitive properties due to their ability to predict realistic ground movement distributions.

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References

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International Journal of Mining and Geo-Engineering

Articles in Press, Accepted Manuscript
Available Online from 20 May 2025

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