2012 Volume 49 Issue 4 Pages 174-185
The Global Positioning System (GPS) began to be used for displacement monitoring in the mid-1980s. Although it had the potential to continuously monitor the displacements of the ground surface over an extensive area, it was not applied much in practice. The reasons were uncertain accuracy, troublesome handling, and high costs at that time. In order to overcome these problems, the authors have developed a new type of GPS displacement monitoring system and used the trend model for improving the accuracy of the measurement. In this research, the authors have developed a web-based GPS-automatic displacement monitoring system combining the above monitoring system with the trend model. The system can automatically measure the three-dimensional displacements with the high accuracy, and provide the monitoring results in real-time on a home page through the internet. In order to verify the system, field experiments were conducted and a practical application for a cut slope is illustrated.
