Abstract
Nowadays, with the rapid development of technology, the importance of deformation measurement is increasing. Measuring the shape and position changes of natural or artificial structures as a result of external factors are called deformation measurements. In order to determine deformations, geodetic control networks are generally established and measurements are made at various periods in these networks. Deformation analysis is performed using the point coordinates obtained by evaluating the measurements made. GPS is generally used for horizontal and vertical directions and precision levelling method is generally used for vertical direction only in determining deformation in geodetic control networks. Measurements made in different periods are tested with deformation models and it is investigated whether there is deformation in the passing time. In this study, we aimed to examine the vertical crust movements in and around the tide gauge station in Trabzon harbour area. For this purpose, in a leveling network established in the study area, precision levelling measurements were made in two periods, June 2020 (1st period) and October 2020 (2nd period). The measured height differences were adjusted according to the free network method. In both periods, the t-distributed inconsistent test was applied and an inconsistent measure was found for a single route. Adjustment was made by removing the inconsistent measurements found. We investigated whether there has been any movement in the network between two periods by using the θ2-criterion method, one of the static deformation model methods. The vertical movements that may occur between different periods have been determined and we investigated whether there is a vertical deformation around the tide gauge station. The calculations regarding the methods applied within the scope of the study were made using MATLAB program codes written by us. Keywords: Adjustment; Deformation; Precise Levelling; Tide gauge; θ2-Criteria Method
Highlights
IntroductionResearchers use various systems and measurement techniques [1]
The technical status of engineering structures should be monitored and estimated
The quantities obtained from the result of adjustment in two periods were used in the θ2-Criteria deformation analysis method, which is the static deformation model
Summary
Researchers use various systems and measurement techniques [1]. Geodetic methods used to accurately determine the locations of the selected points for the monitored structure play an important role in monitoring buildings, bridges, and dams. Geodetic monitoring takes place using a variety of techniques and measurements. The most common are satellite navigation systems, photogrammetry and remote sensing, and laser scanning. Classical geodetic control networks are still used for geodetic methods basically [2,3]. The structural deformations are based on the inscriptions of the positions (displacements) of the points in this network in the time. This kind of deformation can show by periodic measurements [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
