Tunnel anchor rod drilling method based on three-dimensional point cloud, medium and equipment

By generating a tunnel anchor drilling method using 3D point cloud technology, the problem of inaccurate anchor placement in tunnel construction was solved, achieving precise anchor positioning and automated drilling, thus improving construction efficiency and safety.

CN122328090AActive Publication Date: 2026-07-03CENT SOUTH UNIV +1
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Patent Information

Application Number
CN202610787256.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-03
Publication Date
2026-07-03
Estimated Expiration
2046-06-03

AI Technical Summary

Technical Problem

In the current initial support construction of tunnels, the anchor bolt placement is inaccurate, resulting in inconsistent anchor bolt spacing and deflection of drilling angle, which affects the support effect. Moreover, the existing methods are time-consuming and labor-intensive, making it difficult to achieve automated construction operations.

Method used

The tunnel anchor drilling method based on three-dimensional point cloud is adopted. A three-dimensional point cloud model is generated by scanning the tunnel surface with lidar, a two-dimensional physical contour model is extracted, the actual drilling coordinates are calculated, and a drilling-anchor-injection integrated trolley is used for precise positioning and drilling.

Benefits of technology

This ensures the accuracy of the actual placement of anchor bolts, guarantees the consistency of anchor bolt spacing and angle, improves construction efficiency, avoids insufficient anchor bolt penetration depth due to uneven spraying layer, and eliminates potential safety hazards in support.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention relates to the technical field of tunnel drilling and blasting, and particularly discloses a tunnel anchor rod drilling method, medium and equipment based on three-dimensional point cloud.The tunnel anchor rod drilling method comprises the steps that a laser radar is used for scanning the surface of primarily sprayed concrete of a tunnel operation section to obtain a three-dimensional point cloud model of the surface of the primarily sprayed concrete; extracting a two-dimensional point cloud contour of the section of the circumferential anchor rod based on the three-dimensional point cloud model of the primarily sprayed concrete surface to obtain a two-dimensional physical contour model of the primarily sprayed concrete surface; constructing a parameter equation of an anchor rod axis according to designed anchor rod parameters, and carrying out simultaneous solving with the two-dimensional physical contour model of the primarily sprayed concrete surface to obtain an axis distance parameter and a real drilling coordinate; and the drilling, bolting and grouting integrated trolley is used for carrying out drilling operation according to the axis distance parameters and the real drilling coordinates at the designed included angle in a cut-in mode. According to the method, the real drilling coordinate of the anchor rod is directly solved based on the point cloud section, the interference of the uneven surface of the primarily sprayed concrete on anchor rod positioning is overcome, and the accuracy of anchor rod arrangement is improved.
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