Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions
This study used a discrete-element analysis to predict the excavation performance of a 7.73 m-diameter earth pressure balance (EPB) shield tunnel boring machine (TBM). The simulation mainly predicted several excavation performance indicators for the machine, under different operating conditions. The...
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/11/5119 |
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| author | Byungkwan Park Chulho Lee Soon-Wook Choi Tae-Ho Kang Soo-Ho Chang |
| author_facet | Byungkwan Park Chulho Lee Soon-Wook Choi Tae-Ho Kang Soo-Ho Chang |
| author_sort | Byungkwan Park |
| collection | DOAJ |
| description | This study used a discrete-element analysis to predict the excavation performance of a 7.73 m-diameter earth pressure balance (EPB) shield tunnel boring machine (TBM). The simulation mainly predicted several excavation performance indicators for the machine, under different operating conditions. The number of particles in the chamber and the chamber pressure varied, as the operating conditions changed during the simulated TBM excavation. The results showed that the compressive force, torque, and driving power acting on the TBM cutterhead varied with its rotation speed, increasing as the cutterhead rotation speed rose. The overall compressive force acting on all of the disc cutters and their impact wear increased linearly as the cutterhead rotation accelerated. The position of a disc cutter on the cutterhead had a particularly strong influence, with higher compressive forces experienced by the cutters closer to the center. In contrast, the gauge disc cutters at the transition zone of the cutterhead showed more wear than those elsewhere. The muck discharge rate and the driving power of the screw conveyor rose with increasing screw conveyor and cutterhead rotation speeds. Finally, this study suggests optimal operation conditions, based on pressure balance and operational management of the TBM. |
| first_indexed | 2024-03-10T10:50:46Z |
| format | Article |
| id | doaj.art-5e2b466d3c094a83a7011c7b671a5f77 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:50:46Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5e2b466d3c094a83a7011c7b671a5f772023-11-21T22:15:29ZengMDPI AGApplied Sciences2076-34172021-05-011111511910.3390/app11115119Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating ConditionsByungkwan Park0Chulho Lee1Soon-Wook Choi2Tae-Ho Kang3Soo-Ho Chang4Civil and Environmental Engineering, University of Science & Technology (UST), Daejeon 34113, KoreaUnderground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, KoreaUnderground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, KoreaUnderground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, KoreaConstruction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, KoreaThis study used a discrete-element analysis to predict the excavation performance of a 7.73 m-diameter earth pressure balance (EPB) shield tunnel boring machine (TBM). The simulation mainly predicted several excavation performance indicators for the machine, under different operating conditions. The number of particles in the chamber and the chamber pressure varied, as the operating conditions changed during the simulated TBM excavation. The results showed that the compressive force, torque, and driving power acting on the TBM cutterhead varied with its rotation speed, increasing as the cutterhead rotation speed rose. The overall compressive force acting on all of the disc cutters and their impact wear increased linearly as the cutterhead rotation accelerated. The position of a disc cutter on the cutterhead had a particularly strong influence, with higher compressive forces experienced by the cutters closer to the center. In contrast, the gauge disc cutters at the transition zone of the cutterhead showed more wear than those elsewhere. The muck discharge rate and the driving power of the screw conveyor rose with increasing screw conveyor and cutterhead rotation speeds. Finally, this study suggests optimal operation conditions, based on pressure balance and operational management of the TBM.https://www.mdpi.com/2076-3417/11/11/5119EPB shield TBMexcavation performancediscrete element methodoperating condition |
| spellingShingle | Byungkwan Park Chulho Lee Soon-Wook Choi Tae-Ho Kang Soo-Ho Chang Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions Applied Sciences EPB shield TBM excavation performance discrete element method operating condition |
| title | Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions |
| title_full | Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions |
| title_fullStr | Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions |
| title_full_unstemmed | Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions |
| title_short | Discrete-Element Analysis of the Excavation Performance of an EPB Shield TBM under Different Operating Conditions |
| title_sort | discrete element analysis of the excavation performance of an epb shield tbm under different operating conditions |
| topic | EPB shield TBM excavation performance discrete element method operating condition |
| url | https://www.mdpi.com/2076-3417/11/11/5119 |
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