Bulletin of Surveying and Mapping ›› 2020, Vol. 0 ›› Issue (8): 160-163.doi: 10.13474/j.cnki.11-2246.2020.0271

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Analysis and application study of tunnel segment stagger based on mobile 3D scanning technology

ZHAO Yabo1,2,3, WANG Zhi1,3,4   

  1. 1. Qingdao Surveying & Mapping Institute, Qingdao 266032, China;
    2. Shandong Joint Innovation Center of Coast Survey and Monitor Engineering, Qingdao 266032, China;
    3. Qingdao Engineering Research Center of Geographical Informationof Underground Space, Qingdao 266032, China;
    4. West Coast Geomatics Center of Qingdao, Qingdao 266555, China
  • Received:2020-06-19 Online:2020-08-25 Published:2020-09-01

Abstract: The segmentstagger is one of the main diseases of subway tunnel, usually due to the poor construction control of shield machine or the change of tunnel load. Other diseases such as convergence deformation and water seepage can also be caused by the occurrence of segment staggered.The traditional method mainly uses the manual inspection, because of the night window period short influence, this method efficiency is low, the result is difficult to accurately quantify. The three-dimensional laser scanning system based on track is used to detect the tunnel stagger, and the segment is divided and the mileage is matched based on the 3D point cloud information of each ring. Taking Qingdao metro line 2 as an example, this paper introduces the application of mobile scanning technology in the detection of segment staggered, which provides some reference for its popularization and application in other tunnels.

Key words: 3D laser scanning, metro tunnel, segment stagger, disease detection, point cloud

CLC Number: