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Method for measuring circular tunnel convergence deformation

A technology of convergent deformation and measurement method, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve problems such as inability to fully reflect tunnel deformation, and achieve the effects of saving calculation time, high measurement efficiency, and guaranteed accuracy

Active Publication Date: 2015-07-22
TONGJI UNIV
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Problems solved by technology

This patent has the defect that only a small amount of measuring point data can be obtained, which cannot fully reflect the deformation of the entire tunnel

Method used

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  • Method for measuring circular tunnel convergence deformation
  • Method for measuring circular tunnel convergence deformation
  • Method for measuring circular tunnel convergence deformation

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0033] The invention discloses a method for measuring the convergence deformation of a circular tunnel, which involves two aspects of on-site measurement and data processing. In terms of on-site measurement, the present invention takes any circular tunnel as the scanning target and uses three-dimensional laser scanning technology for measurement, which can obtain the three-dimensional coordinates of thousands of measuring points with a distance of several millimeters, the measurement speed is very fast, and the point cloud It can be automatically recorded in the storage system of the ...

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Abstract

The invention relates to a method for measuring circular tunnel convergence deformation. The method includes the steps of S1, by a three-dimensional laser scanner, acquiring the working base point coordinates and tunnel point cloud of each observation station; S2, using working base points as splicing datum points to merge the tunnel point cloud into a unified reference coordinate system, and segmenting into point cloud of a multi-ring pipe joint according to the pipe joint; S3, fitting the point cloud of a single-ring pipe joint into a cylindrical face according to an improved cylindrical face fitting algorithm, extracting pipe joint axis point coordinates, projecting the cylindrical face to a plane along the axis direction of the pipe joint to obtain a two-dimensional tunnel point cloud contour line, and fitting into an ellipse according to an ellipse fitting algorithm; S4, expanding the ellipse into a three-dimensional elliptic cylindrical surface along the axis so as to obtain the three-dimensional convergence deformation of a whole tunnel. Compared with the prior art, the method has the advantages that the longitudinal axis and convergence deformation of the tunnel under construction and the tunnel under operation can be acquired, monitoring point laying is not needed, high measuring efficiency is achieved, and comprehensive monitoring data is provided to tunnel construction and operation.

Description

technical field [0001] The invention relates to the technical field of tunnel deformation monitoring, in particular to a method for measuring the convergence deformation of a circular tunnel. Background technique [0002] In recent years, with the rapid development of my country's urbanization process, in order to solve the problem of traffic congestion in big cities, major cities are vigorously developing urban rail transit projects. In addition to subway tunnels, the construction scale of road tunnels in my country is also expanding. At present, road tunnels are increasing at an average annual rate of 350 kilometers. Deformation monitoring is indispensable both during the construction and operation phases of tunnels. Because the tunnel is located in a rock-soil medium with complex conditions, the interaction mechanism between the stratum and the structure is not clear, so there is still no relatively complete tunnel structure design theory. [0003] Currently, the common...

Claims

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Application Information

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IPC IPC(8): G01B11/16
Inventor 谢雄耀朱侃唯刘晨刘欢何佳敏
Owner TONGJI UNIV
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