Earth and rockfill dam filling real-time dam face deformation monitoring method based on point cloud data

Abstract

The invention discloses an earth and rockfill dam filling real-time dam face deformation monitoring method based on point cloud data. The method comprises the steps of: using multiple sets of three-dimensional laser scanners for collecting earth and rockfill dam surface point cloud data at different control points; overlapping the adjacent scanning areas by 30%; resolving and splicing the data by using a point cloud data analysis program; meshing the obtained point cloud data based on a triangulation network curved surface modeling method to obtain a high-resolution dam body digital elevation model; and selecting to-be-compared two-stage dam face digital elevation models, and carrying out displacement calculation and analysis on homonymy points to obtain dam face deformation real-time information. The advantages of the three-dimensional laser scanning technology are fully utilized to be applied to deformation monitoring of an earth and rockfill dam, high-density dam surface point cloud data of the three-dimensional laser scanner are obtained, and global micro-deformation non-contact sensing is achieved; and through comparison of the comprehensive real scene models established in different time periods of the construction period, the deformation trend of the dam face is monitored more comprehensively and visually.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering deformation monitoring, in particular to a real-time dam surface deformation monitoring method for earth-rock dam filling based on point cloud data. Background technique [0002] With the continuous development of my country's hydropower projects, dam engineering technology, especially the deformation monitoring technology of earth-rock dams, has accumulated rich experience. Great progress has been made in aspects such as three-dimensional overall comprehensive monitoring. At the same time, based on different methods such as on-site monitoring, numerical simulation and indoor test, the deformation evolution law of the earth-rockfill dam is studied more deeply. However, there are still problems in the three-dimensional coordinated deformation mechanism of the earth-rock dam as a whole and the dam surface. Traditional monitoring methods can only monitor the deformation of a small ...

AI Technical Summary

Problems solved by technology

However, there are still problems in the three-dimensional coordinated deformation mechanism of the earth-rock dam as a whole and the dam surface.

Traditional monitoring methods can only monitor the deformation of a small number of points, and cannot accurately and completely reflect the overall three-dimensional deformation of the earth-rock dam, which has great limitations

[0003] The existing monitoring methods adopt traditional single-point monitoring, which cannot realize comprehensive overall monitoring and establish a comprehensive real-world model, and it is difficult to truly reflect the overall dam surface deformation of the on-site earth-rock dam body; and the construction of monitoring methods is complicated and requires a lot of manpower material resources

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