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Modeling Excavation Chamber of EPB Tunnel Boring Machine by Discrete Element Method | ||
| AUT Journal of Civil Engineering | ||
| مقاله 5، دوره 9، شماره 1، 2025، صفحه 65-76 اصل مقاله (1.06 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2025.23335.5872 | ||
| نویسندگان | ||
| Arjmand Sheykhi؛ Arash Refahi؛ Farhad Samimi Namin* | ||
| Department of Mining Engineering, Engineering Faculty, University of Zanjan, Zanjan, Iran. | ||
| چکیده | ||
| Earth Pressure Balance (EPB) tunnel boring machines are widely utilized for the excavation of subway tunnels. These machines leverage the pressure generated by the excavated materials within the excavation chamber to stabilize the tunnel face. The pressure in the excavation chamber is modulated by varying the speed of the screw conveyor, making the precise control of this rotation speed critically important. Such adjustments facilitate the management of the tunnel face and influence the overall settlement of the tunnel structure. This study models the tunnel excavation of Tabriz Metro Line 2, employing an EPB shield that operates under earth pressure conditions. The excavated material is accumulated in a chamber located behind the cutter head, which generates the requisite pressure at the work face. This pressure is regulated through the screw conveyor mechanism. The simulation was conducted using a three-dimensional particle flow code based on the discrete element method. The findings indicate that when the pressure at the face is decreased to 50% of the maximum pressure exerted by the horizontal jacks of the shield drive, significant and hazardous ground surface settlements occur. Conversely, at elevated pressures, a consistent settlement of 1.9 cm was recorded. Additionally, a reduction in the cutter-head rotation speed from 2 rpm resulted in a decline of the work face, while an increase in speed corresponded with the same 1.9 cm settlement. The discrete element method effectively models the drilling process. The validity of the modeling outcomes was corroborated by data acquired from instrumentation. | ||
| کلیدواژهها | ||
| EPB؛ PFC3D؛ DEM؛ TBM؛ Screw Conveyor؛ Ground Surface Settlement | ||
| مراجع | ||
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[1] Z. Wu, R. Wei, Z. Chu, Q. Liu, Real-time rock mass condition prediction with TBM tunneling big data using a novel rock–machine mutual feedback perception method, Journal of Rock Mechanics and Geotechnical Engineering, 13(6) (2021) 1311-1325.
[2] L. Yin, Q. Gong, J. Zhao, Study on rock mass boreability by TBM penetration test under different in situ stress conditions, Tunnelling and Underground Space Technology, 43 (2014) 413-425.
[3] X. Rong, H. Lu, M. Wang, Z. Wen, X. Rong, Cutter wear evaluation from operational parameters in EPB tunneling of Chengdu Metro, Tunnelling and Underground Space Technology, 93 (2019) 103043.
[4] S. Acun, N. Bilgin, U. Erboylu, Contribution on the understanding of EPB-TBM drives in complex geologic structures, Tunnelling and Underground Space Technology, 107 (2021) 103646.
[5] E. Avunduk, H. Copur, Empirical modeling for predicting excavation performance of EPB TBM based on soil properties, Tunnelling and Underground Space Technology, 71 (2018) 340-353.
[6] X. Xie, Y. Yang, M. Ji, Analysis of ground surface settlement induced by the construction of a large-diameter shield-driven tunnel in Shanghai, China, Tunnelling and Underground Space Technology, 51 (2016) 120-132.
[7] B. Mu, X. Xie, X. Li, J. Li, C. Shao, J. Zhao, Monitoring, modelling and prediction of segmental lining deformation and ground settlement of an EPB tunnel in different soils, Tunnelling and Underground Space Technology, 113 (2021) 103870.
[8] X. Hu, C. He, G. Walton, Y. Fang, Face failure in cobble-rich soil: Numerical and experimental approaches on 1 g EPB reduced scale model, Soils and Foundations, 61(6) (2021) 1500-1528.
[9] W. Hu, J. Rostami, A new method to quantify rheology of conditioned soil for application in EPB TBM tunneling, Tunnelling and Underground Space Technology, 96 (2020) 103192.
[10] M. Varma, V. Maji, A. Boominathan, Numerical modeling of a tunnel in jointed rocks subjected to seismic loading, Underground Space, 4(2) (2019) 133-146.
[11] M. Nematollahi, H. Molladavoodi, D. Dias, Three-dimensional numerical simulation of the Shiraz subway second line–influence of the segmental joints geometry and of the lagging distance between twin tunnels’ faces, European Journal of Environmental and Civil Engineering, 24(10) (2020) 1606-1622.
[12] X. Yin, R. Chen, F. Meng, Influence of seepage and tunnel face opening on face support pressure of EPB shield, Computers And Geotechnics, 135 (2021) 104198.
[13] J. Zhong, S. Wang, Numerical modeling of muck movement and chamber pressure distribution during EPB shield tunneling with auxiliary air pressure balance mode, Wan-Huan Zhou, Zheng Guan and Xue Li, editors, (2024) 239.
[14] M. Nematollahi, D. Dias, Twin earth pressure balance tunnelling–monitoring and numerical study of an urban case, Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 176(6) (2022) 662-674.
[15] M. Forsat, M. Taghipoor, M. Palassi, 3D FEM model on the parameters’ influence of EPB-TBM on settlements of single and twin metro tunnels during construction, International Journal of Pavement Research and Technology, 15(3) (2022) 525-538.
[16] E.M. Comodromos, M.C. Papadopoulou, G.K. Konstantinidis, Numerical assessment of subsidence and adjacent building movements induced by TBM-EPB tunneling, Journal of Geotechnical and Geoenvironmental Engineering, 140(11) (2014) 04014061.
[17] G. Krishna, V. Maji, Numerical Simulation of EPBM Induced Ground Settlement, Indian Geotechnical Journal, 52(2) (2022) 341-351.
[18] Q. Xu, H. Yu, J. Chong, J. Xie, X. He, Y. Li, J. Li, The analysis for characteristic of particles movement and pressure balance stability in the shield soil chamber during the EPBS excavation in weathered diorite stratum, Engineering Failure Analysis, 159 (2024) 108029.
[19] N. Berthoz, D. Branque, H. Wong, D. Subrin, TBM soft ground interaction: Experimental study on a 1 g reduced-scale EPBS model, Tunnelling And Underground Space Technology, 72 (2018) 189-209.
[20] C. Tsigginos, J. Strong, A. Zavaliangos, On the force–displacement law of contacts between spheres pressed to high relative densities, International Journal of Solids and Structures, 60 (2015) 17-27.
[21] R. Balmer, W. Keat, Exploring Engineering: An Introduction to Engineering and Design, Academic Press, 2015.
[22] D.O. Potyondy, P.A. Cundall, A bonded-particle model for rock, International journal of rock mechanics and mining sciences, 41(8) (2004) 1329-1364.
[23] L. Jing, O. Stephansson, Fundamentals of discrete element methods for rock engineering: theory and applications, Elsevier, 2007.
[24] PFC 6.0 documentation. Itasca Consulting Group. Minneapolis, MN, US (2018).
[25] Reports of Tabriz Urban Train Organization, Tabriz Metro Line 2 Plan (1388).
[26] M. Ochmański, R.L. Spacagna, G. Modoni, 3D numerical simulation of consolidation induced in soft ground by EPB technology and lining defects, Computers and Geotechnics, 128 (2020) 103830.
[27] B. Mattle, C. Weigl, J. Benedikt, Numerical Simulation of Excavating the Overburden Above a Masonry Tunnel, Felsbau, (2002).
[28] Y. Sawamura, K. Konishi, Y. Cui, K. Kishida, M. Kimura, Numerical Simulations of Centrifugal Experiments on Seismic Behavior of Shallow Overburden Tunnels with Pre-ground Improvement, in: Challenges and Innovations in Geomechanics: Proceedings of the 16th International Conference of IACMAG-Volume 2 16, Springer, 2021, pp. 411-419.
[29] K. Vineetha, A. Boominathan, S. Banerjee, Numerical Modelling of Mechanised Tunnelling in Clay, in: Soil Dynamics and Earthquake Geotechnical Engineering: IGC 2016 Volume 3, Springer, 2019, pp. 161-167. | ||
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آمار تعداد مشاهده مقاله: 439 تعداد دریافت فایل اصل مقاله: 248 |
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