Three-dimensional laser scanning underground engineering similar material simulation test surface layer deformation method

Abstract

The invention belongs to the technical field of underground engineering space position deformation, and particularly relates to a three-dimensional laser scanning underground engineering similar material simulation test surface layer deformation method. A five-point mark control point method is adopted, five points serve as point cloud matching references, after scanning parameters are determined,underground engineering before and after excavation is scanned by using three-dimensional laser so as to obtain data of point cloud deformation of the similar material simulation test surface layer,the data are processed and modeled, then visualized processing is carried out, and a visual cloud diagram is generated. According to the method, the problems which exist when a similar material simulation test is carried out to obtain surface layer deformation information in a laboratory by adopting a theodolite and a total station are solved, a three-dimensional laser scanning technology is utilized, and a data card and visual processing are formed, so that a more visual and higher-precision test result is obtained.

Description

technical field [0001] The invention belongs to the technical field of spatial position deformation of underground engineering, and in particular relates to a three-dimensional laser scanning similar material simulation test surface deformation method of underground engineering. Background technique [0002] The surface deformation of the existing simulation test of similar materials in underground engineering is observed by theodolite or total station, which is a single-point sequential observation. When there are many measurement points, especially when the surface of the test model collapses, falls or separates, it cannot be captured. Real-time information of deformation points, which leads to the inability to obtain a lot of information in actual underground engineering, even if the information obtained is isolated point information. [0003] Therefore, in order to obtain accurate and real-time deformation information of different spatial positions during the implementat...

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is that when the laboratory carries out similar material simulation tests to obtain surface layer deformation information, theodolite and total station are generally used to observe, and there are the following problems: (1) observation is single-point observation, and information between observation points is No, it is considered that the deformation between adjacent points is linear; (2) When the number of observation points is large, it is time-consuming and laborious, requiring people to constantly adjust the instrument, which cannot capture small information changes that appear in a short time; (3) Theodolite and total station instrument limitations and errors caused by human observation, observation errors often fail to meet the test requirements

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