盾构隧道衬砌缺损移动扫描检测方法研究  

A Study on Mobile Scanning Detection Method of Lining Defects in Shield Tunnels

作　　者：巩健 GONG Jian(China Railway Design Corporation,Tianjin 300251,China)

机构地区：[1]中国铁路设计集团有限公司,天津300251

出　　处：《铁道工程学报》2024年第4期75-79,共5页Journal of Railway Engineering Society

基　　金：天津市科技计划项目(23YFYSHZ00190)。

摘　　要：研究目的:衬砌缺损病害状况是盾构隧道健康状态评估的重要参考依据。传统人工巡检方法受环境和人为因素影响大、检测效率低且易发生漏检。车载移动扫描技术已在隧道收敛和错台等结构病害检测中得到应用,本文充分发挥其“多方面应用”的特点,研究利用该技术获取的三维激光点云准确、快速地检测隧道衬砌缺损病害的方法,用以辅助运维管理部门及时掌握相关信息开展修缮工作。研究结论:(1)对盾构隧道激光点云采用圆柱模型建立投影关系可实现三维点云向二维图像的跨模态转换,有效提升数据处理效率;(2)将点云的位置信息和深度信息融合创建深度图像,能够突出衬砌缺损区域的视觉对比度,从而快速判识衬砌缺损病害;(3)经工程实例验证,本研究成果的检测准确率高于传统人工巡检方法,可应用于盾构隧道表观病害检测领域。Research purposes:The condition of lining defects is an important reference for assessing the health status of shield tunnels.The traditional manual inspection method is greatly affected by the environment and human factors,low detection efficiency and prone to leakage.Vehicle-borne mobile scanning technology has been applied in the detection of structural defects such as tunnel convergence and misalignment,and this paper gives full play to the characteristics of its"multi-faceted application",and investigates the use of the three-dimensional laser point cloud obtained by this technology to accurately and quickly detect defective tunnel lining damage,which can be used to assist the operation and maintenance departments to grasp the relevant information in time to carry out the repair work.Research conclusions:(1)Adopting the cylindrical model to establish the projection relationship for the laser point cloud of shield tunnels can realize the cross-modal conversion from 3D point cloud to 2D image,which can effectively improve the efficiency of data processing.(2)Fusing the positional and depth information from the point cloud to create a depth image highlights the visual contrast of the lining defects,allowing for quick identification of lining defects.(3)As verified by engineering examples,the detection accuracy of this research result is higher than that of the traditional manual inspection method,and it can be applied in the field of apparent disease detection of shield tunnel.

关 键 词：车载移动扫描 盾构隧道 衬砌缺损 跨模态转换 深度图像 

分 类 号：P225[天文地球—大地测量学与测量工程]