Method for detecting shape change of metro tunnel section

A detection method and tunnel technology, which can be applied in cross-section drawing, measuring devices, surveying and navigation, etc., can solve the problems of inconvenient implementation, high requirements for measuring instruments, and low precision, so as to improve fitting accuracy, improve fitting accuracy, and improve The effect of precision

Active Publication Date: 2017-07-21
SHANGHAI TONGYAN CIVIL ENGINEERING TECHNOLOGY CORP LTD
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Problems solved by technology

[0005] For the detection of the convergence deformation of the tunnel section, there are currently several methods including manual section measurement, 3D laser scanning measurement and tunnel inspection trolley measurement. Manual detection is not only low in accuracy but also takes a long time. Accuracy measurement, but the requirements for measuring instruments are high, it is not ea

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  • Method for detecting shape change of metro tunnel section
  • Method for detecting shape change of metro tunnel section
  • Method for detecting shape change of metro tunnel section

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Embodiment Construction

[0049] 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.

[0050] Such as figure 1 As shown, the present embodiment proposes a detection method for the section deformation of a subway tunnel, including the following steps:

[0051] 1) With the centerline of the tunnel track as the origin, establish a Cartesian coordinate system for the subway tunnel section;

[0052] 2) Carry out data measurement on the tunnel section according to the goniometer, laser rangefinder and laser scanner, and obtain the coordinate offset angle α and the coordinates of all measurement points of the subway tunnel section in the Cartesian coordinate system establishe...

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Abstract

The invention relates to a method for detecting shape change of a metro tunnel section. The method comprises the following steps: with a center line of a tunnel track as an original point, establishing a rectangular coordinate system of the metro tunnel section; according to an angle meter, a laser ranger and a laser scanner, performing data measurement on the tunnel section to obtain a coordinate offset angle alpha and coordinates of all measuring points of the metro tunnel section in the rectangular coordinate system, wherein the coordinates of an ith measuring point is (xi, yi); by an elliptic fitting algorithm, performing curve fitting on basic measurement data to obtain a shape parameter, meeting an error requirement, of the tunnel section; judging whether the offset between the shape parameter of the tunnel section and a historical shape parameter exceeds an offset threshold, if yes, indicating that the metro tunnel section has obvious shape change, otherwise, indicating that the metro tunnel section does not have obvious shape change. Compared with the prior art, the method has the advantages of high measurement accuracy, comprehensive measurement, convenience in implementation and the like.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for detecting section deformation of a subway tunnel. Background technique [0002] At present, my country's urban rail transit is developing rapidly, and more than a dozen cities have opened subways. The subway has become an important way for citizens to travel, and the responsibility for ensuring the safety of subway operation is heavy. [0003] The safety problems during shield tunnel construction and subway operation are mainly manifested in the following aspects: the soft soil layer under the tunnel softens under the long-term vibration load and causes settlement; the construction activities near the tunnel cause tunnel deformation; the underlying soil layer of the interval tunnel Water and soil erosion causes destructive longitudinal deformation; when the tunnel passes through areas with different soil conditions, the difference in soil physical propertie...

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Application Information

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IPC IPC(8): G01C7/06G01B11/16
CPCG01B11/16G01C7/06
Inventor 刘学增朱爱玺陈国富
Owner SHANGHAI TONGYAN CIVIL ENGINEERING TECHNOLOGY CORP LTD
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