Shield subway construction ground surface deformation monitoring method based on close-range photogrammetry

Abstract

The invention discloses a shield subway construction ground surface deformation monitoring method based on close-range photogrammetry, and aims to look for a more effective implementation scheme for shield subway construction monitoring. The method comprises the following steps: obtaining elements of interior orientation of a photographing camera; arranging one control point in each edge corner inan area to be monitored, and two or three control points at the center; using a total station to collect coordinate information of the control points, and obtaining image information of the area to be monitored through the photographing camera with photographing parameters preset; generating a point cloud map of the area to be monitored according to the elements of interior orientation, coordinate information and image information; and obtaining a new point cloud map of the area to be monitored, and obtaining ground surface deformation information by comparing the point cloud map with the newpoint cloud map. The shield subway construction ground surface deformation monitoring method based on close-range photogrammetry realizes multi-point monitoring through a close-range photogrammetry technology, solves the problem that the deformation condition of a monitoring point-free area is difficult to discover in existing single-point monitoring, and saves manpower.

Description

technical field [0001] The invention relates to the field of construction, in particular, the invention relates to a method for monitoring surface deformation of a shield subway construction based on close-range photogrammetry. Background technique [0002] With the continuous development of economic construction in recent years, the scale of cities has continued to expand, the urban population has continued to increase, and the pressure on urban traffic has increased. The construction of subway tunnels has become an important choice for cities to relieve traffic pressure. At the same time, my country's tunnel and underground engineering construction technology is also constantly improving, but safety accidents still exist in tunnel construction. In order to ensure the safety during the construction process, the methods and principles of informatization construction have been widely promoted and applied in the tunnel construction process in recent years. [0003] At present...

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Problems solved by technology

[0003] At present, the traditional detection methods are still widely used in engineering practice. The traditional monitoring methods mostly use the measurement methods of total stations and level instruments, which are characterized by single-point monitoring. There are few monitoring points, and it is difficult to find the deformation of the area without monitoring points. , and requires a lot of manpower

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