Abstract
Abstract. The ancient city wall is affected by factors such as environment and man-made factors, and the formed bulging disease is particularly prominent, and even caused irreversible damage to the ancient city wall. Therefore, the bulging monitoring after the repair of the city wall should be the top priority of the deformation monitoring of the city wall. This paper proposes a new plan for monitoring the bulge after the repair of the city wall. According to the point cloud data before the repair, the characteristic plane is fitted to determine the bulge range of the city wall, and then observation signs are placed on the surface of the repaired city wall at the corresponding location where the bulging deformation is severe. By using a total station to monitor the space coordinates of the observation signs, the deformations perpendicular to the wall can be obtained through coordinate conversion, and then the bulging of the repaired city wall can be determined. The actual application results show that this method can effectively monitor the swelling of the ancient city wall after the repair.
Highlights
As the framework of ancient Chinese cities, the ancient city wall reflects the construction technology and ideological form of the corresponding dynasty under the requirements of military defence and ancient city planning, and reflects the level of ancient Chinese cultural development on the side
The falling off and deformation of the swelling and deformation caused the inaccuracy of the swelling deformation data (Li, 2018). In response to this situation, this article proposes a new monitoring method that can realize the monitoring of key swollen disease areas, and through the new observation signs designed for monitoring, it can be realized from the two aspects of accuracy requirements and ancient building protection principles
Three-dimensional laser scanning is used to determine the severe bulging range of the city wall before the repair, and the small fixed prism in the wall joint is used as an observation sign
Summary
As the framework of ancient Chinese cities, the ancient city wall reflects the construction technology and ideological form of the corresponding dynasty under the requirements of military defence and ancient city planning, and reflects the level of ancient Chinese cultural development on the side. Based on the principle of preventive protection of ancient buildings, the bulging monitoring after the repair of the city wall will be a prominent focus of the city wall deformation monitoring. The general monitoring method is to evenly distribute the observation signs on the city wall according to the distance, and calculate the deformation by comparing the monitoring data (Zhou, 2011). The falling off and deformation of the swelling and deformation caused the inaccuracy of the swelling deformation data (Li, 2018) In response to this situation, this article proposes a new monitoring method that can realize the monitoring of key swollen disease areas, and through the new observation signs designed for monitoring, it can be realized from the two aspects of accuracy requirements and ancient building protection principles. Effective monitoring of swelling after the ancient city wall is repaired
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