Cui, L Z; Liu, J; Luo, H; Wang, J; Zhang, X; Lv, G and Xie, Q (2024) Deformation measurement of tunnel shotcrete liner using the multiepoch lidar point clouds. Journal of Construction Engineering and Management, 150(6): 04024049, ISSN 0733-9364
Abstract
To ensure the safety of tunnel construction, it is necessary to accurately and timely measure the deformation of the shotcrete liner during the management of the construction process. The light detection and ranging (LiDAR) technique, known as the reality reproduction technology, provides a new solution for deformation measurement. However, the nonsmooth defects of shotcrete liner and the scattered noise points caused by the nearby dust, as well as a large number of nontunnel structures such as pipes, construction machinery, and vehicles in the obtained tunnel point cloud datasets, hinder the application of point clouds in deformation measurement of shotcrete liner. In this paper, a ring simulation sampling (RSS) method for automatic sampling and deformation measurement of shotcrete liner using the multiepoch LiDAR point clouds is proposed. This method constructs the virtual ring according to shape of the tunnel cross section and emits the rays from the ring to the center of each tunnel cross section. The length difference of the rays arriving at the outer wall of the multiepoch tunnel point clouds is calculated to achieve the analysis of overall and local deformations of the shotcrete liner. The shotcrete liner point clouds generated by the manual modeling and terrestrial laser scanning are tested to validate the effectiveness of the method in extracting the deformation of shotcrete liner. Compared with the conventional total station monitoring, the mean absolute deviation and root mean square error are 1.39 and 1.93 mm, respectively, which indicates that the RSS method could be effectively applied to the deformation measurement of tunnel shotcrete liner.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | deformation measurement; drilling-and-blasting tunnel construction; light detection and ranging point clouds; shotcrete liner |
| Index terms: | tunnel construction, deviation, effectiveness, sampling, monitoring, modelling, tunnel, point cloud, laser scanning, drilling, construction process, deformation, dataset, mean square error |
| Subjects: | infrastructure and transport systems, building construction, data management, probability and distributions, digital design, material properties and characteristics, performance management, civil engineering, financial and cost management, analytical methods, control systems, data collection methods |
| Topics: | Quality Management, Digital Applications, Site Management, Engineering Principles, Construction Materials, Research Practice, Cost Management, Construction Technology |
| Descriptive scope: | 4 PCEA |
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