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Current deformation analysis method is based on the conventional means of deformation monitoring , Looking at domestic decades of monitoring the course of development of the technology , conventional deformation monitoring method geodetic method and close-range photogrammetry . Although these conventional monitoring methods , processes and standards have been mature , but it still can not fully meet the deformation monitoring and analysis of the needs of the modern engineering . Geodetic method, while high precision of sub-millimeter level , but it monitors the data is very limited , only a few points in the space , the point generation line to line represents the surface of the pattern is clearly can not fully express the monitoring of the deformation of the surface . GPS as a new modern measurement techniques , practices can be divided into cyclical and continuity between the two modes , there are also a point on behalf line , to the line on behalf of surface phenomena . The deformation monitoring terrestrial photogrammetry technology to an early start in a way , the deformation information technology acquisition is more comprehensive , but the photography distance can not be too far , absolute accuracy is low , making its application to be severely affected . To solve the above problems , this article to subway Gongzhufen station construction tunnel data , for example , using a 3D laser scanner as the main monitoring instrument . The instrument acquired point cloud data , greatly improving the spatial sampling rate of deformation monitoring . Point cloud after the corresponding algorithm generates the depth of the image , and as source data for this article Deformation Analysis Method , both to meet the needs of remote monitoring , as well as to meet the overall deformation monitoring and overall deformation analysis needs .
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