A tunnel boring machine with a special-shaped cross section and the tunnel boring machine

By adopting a telescopic excavation arm design perpendicular to the main beam in the main unit of the irregular cross-section tunnel boring machine, combined with a slewing drive structure, the problems of non-compact main unit structure and poor turning performance were solved, resulting in a more compact structure and higher turning performance.

CN119878193BActive Publication Date: 2026-06-23CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Filing Date
2024-12-25
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the existing technology, the boom of the variable amplitude cutting device swings up and down and extends forward, which results in the main structure of the tunnel boring machine with irregular cross-section is not compact enough, the length dimension is large, and the turning performance is affected.

Method used

The design adopts a telescopic excavation arm that is perpendicular to the main beam. The excavation operation is achieved by rotating or extending and retracting. The telescopic excavation arm does not occupy too much space in the length direction. Combined with the rotation drive structure and telescopic drive device, the rock breaking device can be effectively moved and the cross-sectional shape can be controlled.

Benefits of technology

Shortening the main beam length makes the tunnel boring machine's main structure more compact, improves turning performance, and enhances construction efficiency and safety by optimizing the movement path of the rock-breaking device.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN119878193B_ABST
    Figure CN119878193B_ABST
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Abstract

The application provides a special-shaped cross-section tunnel boring machine host and a special-shaped cross-section tunnel boring machine, and belongs to the technical field of tunnel boring equipment. The host comprises a cutter head and a front and rear extending main beam, the main beam is provided with an expansion device for expanding the circular cross-section tunnel excavated by the cutter head to form a special-shaped cross-section tunnel, the expansion device comprises a mounting seat guided and mounted on the main beam in the front and rear direction, the mounting seat is connected with an extension driving device for driving the mounting seat to move forward and backward, the mounting seat is provided with a front and rear extending extension excavating arm through a rotary driving structure, the extension excavating arm is perpendicular to the main beam and is connected with a rock breaking device at the end. The extension excavating arm is perpendicular to the main beam, the extension excavating arm excavates in the attitude perpendicular to the tunnel, and the length direction space is occupied less, so that the length of the main beam can be shortened, the structure of the tunnel boring machine host is more compact, the length size is smaller, and the turning performance is improved.
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