Abstract
Abstract. The traditional method of deformation monitoring involves a large amount of external field measurement and internal processing to obtain the deformation of the measured object. With the development of InSAR technology, deformation monitoring can now be completed more efficiently. In this paper, InSAR technology and LiDAR technology are used to detect the deformation of the Fuwangge Rockery in Qianlong Garden, InSAR technology can provide higher point accuracy and LiDAR technology can provide higher spatial resolution. After the deformation of the rockery is obtained by LiDAR technology, the InSAR experimental results are verified. It is expected that the error of deformation analysis by the two methods will be within 5mm. Finally, the detection results of the two are consistent with each other and complement each other. At the same time, InSAR technology combined with LiDAR technology also provides a new idea for deformation monitoring.
Highlights
Deformation monitoring is the use of special instruments and methods to continuously observe the deformation phenomenon of the deformation body
The maximum shape variable obtained by InSAR technology is 13mm, and the maximum shape variable obtained by LiDAR is 11mm, which is consistent with our expected results
This article has done these works: (1) InSAR and LiDAR techniques were used to monitor the deformation of the rockery in Qianlong Garden respectively (2) The deformation change of rockery from 2010 to 2018 was analyzed by combining the two technologies (3) It provides a new method for deformation monitoring of architectural heritage
Summary
Deformation monitoring is the use of special instruments and methods to continuously observe the deformation phenomenon of the deformation body. The ground 3D laser scanning technology has been widely used in urban planning, cultural relics protection, restoration of ancient buildings, transportation and deformation monitoring (Zhu, 2013;Zhang and Cheng,2018;Chang et al, 2019; Wang et al, 2013; Li et al, 2015; Guo et al, 2020; Wang et al, 2018; Gao et al, 2019). Qianlong Garden ( known as Ningshou Palace Garden) is located in the northwest corner of the Ningshou Palace in the East Road of the Forbidden City. Built in the thirty-six to eleventh year of Emperor Qianlong (AD 1771–1776), the garden is 160 meters long from north to south and 37 meters wide from east to west It faces the palace wall in the west and the palace in the east, covering an area of 5,920 square meters.
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