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Effectiveness analysis of a novel rectangular tunnel boring machine with planetary transmission for box jacking
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- Ma, Peng
- School of civil engineering, Xi’an University of Architecture and Technology Laboratory of Rock Engineering and Mining Machinery, Department of Earth Resources Engineering, Kyushu University
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- Zhao, Yahong
- School of civil engineering, Xi’an University of Architecture and Technology School of civil engineering, Sun Yat-sen University Laboratory of Rock Engineering and Mining Machinery, Department of Earth Resources Engineering, Kyushu University
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- Shimada, Hideki
- Laboratory of Rock Engineering and Mining Machinery, Department of Earth Resources Engineering, Kyushu University
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- Zhou, Hao
- School of civil engineering, Sun Yat-sen University
Description
Traditional rectangular tunnel boring machines have low tunneling efficiency, poor soil mixing effects, which has hindered the construction of long-distance and large-section box jacking projects. To overcome these limitations, a new type of full-face excavation boring machine was developed based on a planetary transmission mechanism. This machine achieves full-face excavation by utilizing three eccentric cutter heads that revolve around both the central axis of the cutter plate and their individual shafts. The design methodology, feasibility, and principles of this new mechanism were introduced. Furthermore, a successful construction project of an underground highway passage in Japan was presented as a case study to demonstrate the design and application of this tunnel boring machine. The case details include the excavation face support mechanism, optimal cutter-head layout, obstacle removal strategies, and methods for reducing jacking resistance. Monitoring data from the project verified the applicability, reliability, and overall engineering performance of the rectangular shield machine developed using the planetary mechanism. This research demonstrates that the planetary transmission mechanism-based boring machine offers superior performance in terms of ground settlement and tunneling speed, potentially providing a comprehensive solution to the challenges in the development of rectangular shield machines for box jacking projects.
Journal
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- Scientific Reports
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Scientific Reports 14 27059-, 2024-11-07
Springer
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Keywords
Details 詳細情報について
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- CRID
- 1050584796498896256
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- ISSN
- 20452322
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- HANDLE
- 2324/7337613
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
