| Title |
A Study on Displacement Visualization Technology for Retaining Walls Using LiDAR |
| Authors |
Jun-Sang Kim ; Young Suk Kim |
| DOI |
https://dx.doi.org/10.6106/KJCEM.2025.26.4.026 |
| Keywords |
Retaining Wall; LiDAR; Displacement; Visualization Technology |
| Abstract |
Retaining wall displacement is a critical measurement factor for intuitively assessing the stability of retaining walls, making its measurement essential. However, traditional inclinometer-based measurement methods face several challenges: 1) difficulties in installation and dismantling, 2) labor-intensive processes, and 3) limitations in displacement measurement range. To address these issues, a 2D-LiDAR-based retaining wall displacement monitoring system has recently been developed. This system provides a cost-effective solution for monitoring retaining wall displacements compared to conventional terrestrial laser scanners. The objective of this study is to develop displacement visualization technology and software for application in the 2D-LiDAR-based retaining wall displacement monitoring system and to evaluate their performance. The developed LiDAR-based displacement visualization technology consists of two key features: 1) a region of interest (ROI) defining function and 2) a multidimensional displacement visualization function. Performance evaluation of the software showed that the average time for updating the ROI boundary was 0.1 seconds, while the average completion times for the front view visualization function and cross-sectional visualization function were 1.47 seconds and 0.24 seconds, respectively. These results demonstrate that the developed system can efficiently process irregular point cloud data and visualize displacement data in real time for field managers. In the future, if the visualization technology is applied in field settings, it is expected to enable field managers to instantly assess retaining wall displacements and make prompt and effective decisions regarding retaining wall stability. |