Author:
Kim Jun-Sang,Lee Gil-yong,Kim Young Suk
Abstract
The displacement of retaining walls is measured using inclinometers in order to evaluate the safety of the wall. However, inclinometers have three problems: they (1) are difficult to install, (2) have local displacement detection, and (3) are measured using manpower. Consequently, a two-dimensional (2D) LiDAR sensor-based retaining wall displacement measurement system that facilitates installation and three-dimensional (3D) displacement detection (more economically feasible than inclinometers) was developed in order to overcome the aforementioned limitations. The developed system collects 3D point cloud data about the retaining wall by rotating the 2D LiDAR sensor 360° at a constant speed. Laboratory experiments were performed using a simulated deformation model to evaluate the displacement measurement performance of the system, which had a root-mean-square error of 2.82 mm at approximately 20 m. The economic feasibility of the system was analyzed, which revealed that the system was economically feasible, with a benefit/cost ratio and breakeven point of 3.52 and 2.71 years, respectively.
Funder
National Research Foundation of Korea
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference39 articles.
1. Displacement Mapping of Point Clouds: Application of Retaining Structures Composed of Sheet Piles;J. Civ. Struct. Health Monit.,2021
2. Three-Dimensional Inverse Analyses of a Deep Excavation in Chicago Clays;Int. J. Numer. Anal. Methods Geomech.,2011
3. Oats, R.C., Escobar-Wolf, R., and Oommen, T. (2017). A Novel Application of Photogrammetry for Retaining Wall Assessment. Infrastructures, 2.
4. Integration of Construction As-Built Data Via Laser Scanning with Geotechnical Monitoring of Urban Excavation;J. Constr. Eng. Manag.,2006
5. Processing of Mobile Laser Scanning Data for Large-Scale Deformation Monitoring of Anchored Retaining Structures along Highways;Comput.-Aided Civ. Infrastruct. Eng.,2021
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