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Shield tunnel section extraction method based on ground laser scanning point cloud

A technology of ground laser scanning and shield tunneling, which is applied in the field of shield tunnel section extraction based on ground laser scanning point cloud, can solve the problems of reducing measurement efficiency and taking a long time to measure.

Pending Publication Date: 2022-05-10
CHINA COAL SCI & TECH GRP NANJING DESIGN & RES INST CO LTD +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a shield tunnel section extraction method based on ground laser scanning point cloud, which aims to solve the problem that the existing tunnel section measurement method takes a long time to measure and reduces the measurement efficiency

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  • Shield tunnel section extraction method based on ground laser scanning point cloud
  • Shield tunnel section extraction method based on ground laser scanning point cloud
  • Shield tunnel section extraction method based on ground laser scanning point cloud

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] see Figure 1 to Figure 4 , the present invention provides a shield tunnel section extraction method based on ground laser scanning point cloud, comprising the following steps:

[0047] S1 scans the tunnel through the ground laser to obtain the section position of the shield tunnel, and calculates and extracts the center coordinates of the section position of the shield tunnel;

[0048] The specific method is: S11 scans the tunnel through the ground laser to obtain the section position of the shield tunnel;

[0049] S12 ...

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Abstract

The invention relates to the technical field of shield tunnel section measurement, in particular to a shield tunnel section extraction method based on ground laser scanning point clouds, which comprises the following steps: scanning a tunnel through ground laser to obtain a shield tunnel section position, and calculating and extracting a center coordinate of the shield tunnel section position; determining a tunnel section equation based on the center coordinate; determining a ray equation in the tunnel section based on the tunnel section equation; determining section points based on the ray equation; according to the method, section fitting is carried out based on the section points, then resampling is carried out, a final tunnel section is obtained, the tunnel is scanned through ground laser, a worker does not need to enter the tunnel for measurement in the whole process, resampling is carried out after section fitting, it is ensured that the finally extracted section points are complete and continuous, and therefore the measurement efficiency and precision are improved. The problems that an existing tunnel section measuring method is long in measuring time and low in measuring efficiency are solved.

Description

technical field [0001] The invention relates to the technical field of shield tunnel section measurement, in particular to a shield tunnel section extraction method based on ground laser scanning point clouds. Background technique [0002] Subway traffic is an effective way to solve the problem of traffic congestion in the process of urbanization. However, the complex underground space structure, ground, surrounding building loads and soil disturbances have caused great hidden dangers to tunnel safety. At the same time, because subway lines are mostly distributed in The safety monitoring of subway tunnel structure safety is particularly important in prosperous cities, densely populated areas with buildings and crowds. [0003] Tunnel safety monitoring mainly relies on tunnel section measurement. The traditional tunnel section measurement mainly uses a total station or an extensometer to measure each tunnel section. [0004] The manual measurement method based on the total ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T17/10
CPCG06T17/205G06T17/10
Inventor 章晓余卜磊史玉峰翟宏亮张宗营邱雪莲刘佳郑干常伟纲
Owner CHINA COAL SCI & TECH GRP NANJING DESIGN & RES INST CO LTD
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