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Chen XM, Yang Z, Jiao HZ, Zhang JL, Wang J, Sun JY. Research on dynamic characteristics of cutter breaking frozen soil and optimal drum rotation speed of the new shaft tunneling machine. Sci Rep 2024; 14:5807. [PMID: 38461163 DOI: 10.1038/s41598-024-55935-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 02/29/2024] [Indexed: 03/11/2024] Open
Abstract
To improve the efficiency of frozen soil excavation, the new shaft tunneling machine was developed. The new shaft tunneling machine exerts pressure on the frozen soil through the cutter under the joint action of its own gravity, the drum rotational force and the inertia force, and the frozen soil is damaged. By unique way of breaking frozen soil to improve the efficiency of frozen soil excavation, the drum rotation speed is one of the factors affecting the performance of frozen soil excavation. This article applies SolidWorks software to establish the model of cutter breaking frozen soil, takes advantage of Hyper Mesh finite element software coupled with LS-DYNA solver to acquire the regular pattern of change in the force change, frozen soil stress-strain and specific energy of cutter crushing frozen soil, etc., which analyzes the destruction of frozen soil when the drum of the new shaft tunneling machine is rotating at the speed of 25-40 rpm. Combine with field test to investigate the mechanism of cutter breaking frozen soil under the optimal drum rotation speed. The investigation results demonstrate that: when frozen soil's self-bearing capacity is lower than the force of cutter, it breaks up and detaches from the soil body, and frozen soil undergoes tensile, compressive and shear damages. For this research, it is instructive for practical engineering.
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Affiliation(s)
- Xin-Ming Chen
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China
| | - Zhi Yang
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China
| | - Hua-Zhe Jiao
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China.
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China.
| | - Jiang-Ling Zhang
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China
| | - Jie Wang
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China
| | - Jin-Yu Sun
- Henan Key Laboratory of Underground Engineering and Disaster Prevention and Control, Henan Polytechnic University, Jiaozuo, 454150, Henan, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454150, China
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