Effectiveness analysis of a novel rectangular tunnel boring machine with planetary transmission for box jacking

Ma, Peng, Zhao, Yahong, 島田, 英樹, Zhou, Hao

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.

Effectiveness analysis of a novel rectangular tunnel boring machine with planetary transmission for box jacking

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Effectiveness analysis of a novel rectangular tunnel boring machine with planetary transmission for box jacking

書誌事項

説明

収録刊行物

キーワード

詳細情報 詳細情報について

書き出し

問題の指摘

詳細情報詳細情報について