Recently, the construction industry has been increasingly using 4th industrial technology for construction and safety. Smart technologies such as drones, 3D modeling, and BIM can supplement existing maintenance methods and allow a small number of mana...
Recently, the construction industry has been increasingly using 4th industrial technology for construction and safety. Smart technologies such as drones, 3D modeling, and BIM can supplement existing maintenance methods and allow a small number of management personnel to supervise the site. Among all industries, the construction industry has the highest rate of accidental fatalities, and the rate of accidental fatalities due to temporary structures was found to be particularly high at approximately 48.1%. Retaining walls, which are among temporary structures, are mainly used to prevent soil during excavation work, and if they are not managed properly, they can lead to accidents such as collapse. It is believed that a method that can supplement the measurement management of retaining walls will be helpful in the safety management of retaining walls on site. In this study, a method for measuring the change in slope during the construction stage of retaining walls using drones and 3D modeling. A 2D image was taken using a drone, and the slope of the retaining wall was measured in a virtual space by implementing it as a 3D model using the Pix 4D Mapper program. In order to verify the accuracy of the slope measurement of the retaining wall using the proposed method, the slope values measured by the digital inclinometer and the design values of the retaining wall were compared and analyzed. Through comparison with the H-Pile plumbness standard 1/100 of the retaining wall construction specifications, it was analyzed that it can be used within the ±0.56/100 error range of the plumbness. Therefore, the proposed method is expected to help solve the difficulties such as the limited cost of the measurement management of the retaining wall and the large management area.