Method for extracting shield tunnel staggered joint and dislocation quantity on basis of three-dimensional scanning technology

A technology of shield tunneling and three-dimensional scanning, which is applied in the direction of measuring devices, instruments, and optical devices, which can solve the problems of low operating efficiency and achieve high accuracy and efficiency

Active Publication Date: 2015-03-25
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Problems solved by technology

The traditional measurement method of staggered seam and staggered platform is mainly through manual measurement with vernier calipers or feeler gauges, which requires climbing operations and is greatly affected by human factors, and the operating efficiency is relatively low

Method used

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  • Method for extracting shield tunnel staggered joint and dislocation quantity on basis of three-dimensional scanning technology
  • Method for extracting shield tunnel staggered joint and dislocation quantity on basis of three-dimensional scanning technology
  • Method for extracting shield tunnel staggered joint and dislocation quantity on basis of three-dimensional scanning technology

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Embodiment

[0020] Example: such as Figure 1-5 As shown, this embodiment specifically relates to a method for extracting the amount of misalignment between adjacent segments and adjacent lining rings of a single-circle shield tunnel based on the three-dimensional laser scanning measurement data of the tunnel, specifically as follows:

[0021] [Extraction of longitudinal seam staggered amount between adjacent segments]:

[0022] (1) Expand the tunnel point cloud data obtained by 3D laser scanning to obtain the orthophoto data of the inner wall, and extract the location information of the spliced ​​longitudinal seams between adjacent segments from the orthophoto data of the inner wall, that is, the mileage and section of the longitudinal seam The three-dimensional space parameters, etc.;

[0023] (2) Calculate the amount of staggering on both sides of the longitudinal seam position in the same lining ring 1 (that is, the staggering seam 2): the lining ring 1 is composed of several segment...

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Abstract

The invention discloses a method for extracting shield tunnel staggered joint and dislocation quantity on the basis of a three-dimensional scanning technology. The method includes the following steps that position information of longitudinal joints between adjacent segments is extracted according to a tunnel inner wall orthographic projection obtained through three-dimensional laser scanning, a section S is arranged perpendicular to the center axis of a tunnel lining ring, and tunnel lining ring point sets P1 and P2 on the two sides of the section S of the longitudinal joint between every two adjacent segments in the distance range of epsilon / 2 are extracted; the point sets P1 and P2 on the two sides of the section S are projected on the section S to obtain two section slices; data inspection is performed on segmented arc sections of arcs on the section slices, the two arcs on the section slices are fitted after gross error points are removed, stagger quantity of the adjacent arc sections of each longitudinal joint is calculated in the radius direction, and the stagger quantity is the dislocation quantity on the two sides of each longitudinal joint between every two segments. The method has the advantages that dislocation quantity extraction precision and efficiency are high.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel measurement, and in particular relates to a method for extracting the amount of seams and stations in a shield tunnel based on a three-dimensional scanning technology. Background technique [0002] There are many factors affecting the structural deformation of subway tunnels. The construction activities themselves lead to certain structural deformations of the completed tunnel structure, such as the disturbance of the surrounding soil during the shield tunneling process, the completion of grouting and grout replacement in the assembled section of the tunnel structure, the position of the entrance and exit holes, and the special features of the horizontal and side passages in the section. Special construction measures for the location of the tunnel, etc.; after being put into operation, the vibration of the train will liquefy the soil around the tunnel, resulting in deformation of the tunnel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
Inventor 郭春生袁钊付和宽侯敬宗程胜一孙俊
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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