A tunnel boring machine and a tunnel boring method

By designing a tunnel boring machine that includes a moving main body, a tunneling arm, and a high-frequency vibrator, the problems of construction difficulties in complex environments using traditional blasting methods and low efficiency of cantilever tunnel boring machines have been solved. This has enabled efficient and stable non-blasting excavation of hard rock tunnels and reduced costs.

CN117627667BActive Publication Date: 2026-07-21CHINA RAILWAY ELEVENTH BUREAU GROUP FIFTH ENGINEERING CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY ELEVENTH BUREAU GROUP FIFTH ENGINEERING CO LTD
Filing Date
2023-10-23
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In existing tunnel construction, traditional blasting methods are difficult to implement in complex environments, cantilever tunnel boring machines have low efficiency in excavating hard rock, and TBMs are expensive, making it difficult to meet the needs of rapid construction of hard rock tunnels.

Method used

A tunnel boring machine was designed, including a mobile main body, a tunneling arm, a scraper conveyor for muck removal, a slewing chassis, a tail support device, and a high-frequency vibrator. By combining the switching of different cutting tools and the use of telescopic support shoes, efficient non-explosive excavation can be achieved.

Benefits of technology

It improved the excavation efficiency of hard rock tunnels, reduced construction impact, extended equipment life, enhanced construction stability and adaptability, and reduced construction costs.

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Abstract

This invention discloses a tunnel boring machine and a tunnel excavation method, comprising a mobile body and a tunneling arm mounted on the mobile body. The mobile body includes a tracked chassis, and a scraper conveyor for muck removal, a slewing chassis, a tail support device, and an inclined base mounted on the tracked chassis. The tunneling arm includes a boom assembly, a vibration damping and buffering device, a high-frequency vibrator, and cutters connected in sequence. The vibration damping and buffering device includes an upper impactor and a lower impactor. The front end of the upper impactor is hinged to the rear end of the shell of the high-frequency vibrator, the rear end of the upper impactor is hinged to the top of the shell of the lower impactor, the front end of the lower impactor is hinged to the bottom of the shell of the high-frequency vibrator, and the rear end of the lower impactor is hinged to the front end of the boom assembly. The cutters are mounted on the front end of the high-frequency vibrator. This method features wide adaptability to surrounding rock, low excavation energy consumption, high excavation efficiency, high stability, real-time analysis of non-explosive tunnel rock strata, and rapid excavation using high-frequency vibration.
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