Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Numerical Study on Rock Breaking by Typical Worn Hobs Based on the Finite Element Method
The wear of hobs in shield tunneling directly affects construction efficiency and safety. This study utilized 3D scanning to identify typical types of hob damage in shield tunneling machines and employed the finite element method to investigate the influence of hob wear on its rock-breaking performance and efficiency. The results revealed that when a hob with eccentric wear breaks rock, stress concentrations occur at the point of maximum eccentric wear. For hobs with blade chipping, stress concentrations emerge between the chipped blade edges, exacerbating wear and the expansion of the chipped opening. As the eccentric wear of the hob increases, the amount of rock damage significantly decreases. Additionally, when the blade chipping angle exceeds 60°, the rock-breaking volume diminishes with further increases in the chipping angle. Eccentric wear of the hob has a more pronounced impact on rock-breaking efficiency. Furthermore, a quantitative relationship between the amount of eccentric wear, the number of worn hobs, and the rock-breaking volume was established, providing essential data for determining the optimal replacement timing of worn hobs in shield tunneling machines during engineering projects.
A Numerical Study on Rock Breaking by Typical Worn Hobs Based on the Finite Element Method
The wear of hobs in shield tunneling directly affects construction efficiency and safety. This study utilized 3D scanning to identify typical types of hob damage in shield tunneling machines and employed the finite element method to investigate the influence of hob wear on its rock-breaking performance and efficiency. The results revealed that when a hob with eccentric wear breaks rock, stress concentrations occur at the point of maximum eccentric wear. For hobs with blade chipping, stress concentrations emerge between the chipped blade edges, exacerbating wear and the expansion of the chipped opening. As the eccentric wear of the hob increases, the amount of rock damage significantly decreases. Additionally, when the blade chipping angle exceeds 60°, the rock-breaking volume diminishes with further increases in the chipping angle. Eccentric wear of the hob has a more pronounced impact on rock-breaking efficiency. Furthermore, a quantitative relationship between the amount of eccentric wear, the number of worn hobs, and the rock-breaking volume was established, providing essential data for determining the optimal replacement timing of worn hobs in shield tunneling machines during engineering projects.
A Numerical Study on Rock Breaking by Typical Worn Hobs Based on the Finite Element Method
Advances in Engineering res
Zhang, Yu (Herausgeber:in) / Li, Dayong (Herausgeber:in) / Zhang, Yukun (Herausgeber:in) / Luan, Yalin (Herausgeber:in) / Liu, Jun (Autor:in) / Ding, Tong (Autor:in) / Ni, Guangrun (Autor:in) / Liu, Jipeng (Autor:in) / Zhang, Jian (Autor:in) / Hao, Peng (Autor:in)
International Conference on Architectural, Civil and Hydraulic Engineering ; 2024 ; Shenyang, China
01.03.2025
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Using Discrete Element Method to Study the Rock Breaking Effect of Worn TBM Cutters
| Online Contents | 2022
Numerical Study of Hydraulic Fracturing Assisted Rock Breaking Based on Discrete Element Method
| Springer Verlag | 2024
Research on Adaptability of CS and BT Hobs to Break Soft and Hard Rock
| Springer Verlag | 2024
Research on Adaptability of CS and BT Hobs to Break Soft and Hard Rock
| Springer Verlag | 2024