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A Positioning Method for Measuring Points of Tunnel Section

A positioning method and point-measuring technology, which is applied in the directions of section drawing, measuring device, surveying and navigation, etc., can solve the problems of heavy workload, high risk of working environment, large error, etc., so as to simplify the workload, improve the detection speed and The effect of increasing the level of intelligence, improving accuracy and effectiveness

Active Publication Date: 2021-11-12
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tunnel section measurement is a very critical and frequently implemented work in tunnel engineering. Accurately and quickly measuring and releasing the designed excavation contour during the tunnel construction period can effectively reduce over-under-excavation and speed up the construction progress; accurate and efficient during the operation period Measurement is an important means to judge the safety status of tunnel operation. At present, tunnel section detection includes two methods: manual measurement and instrument intelligent measurement. Among them, manual measurement needs to clarify the absolute coordinate system of the tunnel section and the absolute coordinate system of the measuring instrument in advance. coordinates, and then converted into an absolute coordinate system through the relationship between the measuring instrument and the test value of the measured point. Therefore, the absolute coordinate system of the tunnel section must be known for manual measurement, and multiple points need to be measured to realize the position of the measured point. Confirmation has the disadvantages of heavy workload, high risk of working environment and large error
[0003] The intelligent measurement of the instrument scans the inner contour of the tunnel through sophisticated intelligent equipment. The point cloud cross-section measurement and analysis device uses intelligent equipment to scan the measurement points in the tunnel, and uses the linear connection and fitting between adjacent points in the point cloud to obtain the tunnel cross-section profile. This method requires a large number of measurements. Point and mathematical fitting calculation, the amount of calculation is very huge, and the convergence analysis needs to be positioned by the coordinate system, but whether it is artificial or intelligent measurement methods, the first problem that needs to be solved is how to automatically locate the detection position, only by solving The effectiveness and accuracy of data collection can only be achieved after the automatic positioning of the detection position

Method used

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  • A Positioning Method for Measuring Points of Tunnel Section
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  • A Positioning Method for Measuring Points of Tunnel Section

Examples

Experimental program
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Effect test

Embodiment 1

[0109] Example 1: Measurement of a single-hole, two-lane tunnel with a design speed of 80km / h, in which three marked points are measured at the arch, and the coordinates are: (51.98, 426.15), (69.91, 431.12), (84.29, 434.68 ); measure 3 marker points on the left side wall, the coordinates are: (-369.85, -30.68), (-372.93, -46.51), (-374.94, -58.26); measure 3 markers on the right side wall point, the coordinates are: (807.35, 1.25), (811.42, -16.34) and (815.08, -33.01); the measurement coordinates of the starting and ending points of the tunnel inner contour are: (-375.4, -247.59) and (822.74, -229.09 ); the coordinates of the measured point to be calibrated are: (X tx , X ty )=(-147.8, 324.18), the coordinates of the measured point to be calibrated are the data measured by the instrument according to the existing benchmark.

[0110] (1) Confirm whether the measuring points of the vault and the left and right side walls meet the requirement that the distance between the mea...

Embodiment 2

[0139] Embodiment 2: A certain three-lane section is measured, wherein three points are measured at the arch, and the coordinates are respectively: (469.79, 765.3), (486.86, 768.51) and (502.29, 771.13), and the left side wall is measured at 3 points, the coordinates are: (-258.11, 50.7), (-255.78, 68.02) and (-253.68, 81.19), the right side wall measures 3 points, the coordinates are: (1539.34, 144.99), (1542.25 , 125.29) and (1546.97, 107.99), the measurement coordinates of the starting and ending points of the tunnel inner contour are: (-244.9, -176.31), (1547.07, -112.88); the coordinates of the measured points to be calibrated are: (X tx , X ty ) = (346.07, 732.11).

[0140] (1) Confirm whether the measuring points of the vault and the left and right side walls meet the requirement that the distance between the measuring points is 10cm to 20cm;

[0141] The adjacent spacing of the three measuring points at the vault position is: 17.4cm, 15.7cm; the adjacent spacing of t...

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Abstract

The present invention relates to the technical field of tunnel engineering detection, and in particular to a method for positioning tunnel cross-section measuring points. (2) Based on the same position, collect the measuring points and coordinates of the marking points of the tunnel section; (3) Calculate the center and radius of the vault, the left side wall and the right side wall respectively according to the coordinates of the marking points; Compared with the prior art, the beneficial effect of the present invention is: the present invention is used for the positioning of the measuring point before the precise measurement of the tunnel section, by establishing the identification point system and calculating the outline of the tunnel, marking the measuring point on the outline, and establishing the measurement reference , The accurate positioning of the measuring point can be obtained through calculation at the same position, eliminating the tedious and complicated manual measurement of multiple positioning, establishing a measurement reference before intelligent measurement, and improving the accuracy and effectiveness of measurement data.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering detection, in particular to a method for locating tunnel section measuring points. Background technique [0002] Tunnel section measurement is a very critical and frequently implemented work in tunnel engineering. Accurately and quickly measuring and releasing the designed excavation contour during the tunnel construction period can effectively reduce over-under-excavation and speed up the construction progress; accurate and efficient during the operation period Measurement is an important means to judge the safety status of tunnel operation. At present, tunnel section detection includes two methods: manual measurement and instrument intelligent measurement. Among them, manual measurement needs to clarify the absolute coordinate system of the tunnel section and the absolute coordinate system of the measuring instrument in advance. coordinates, and then converted into an absolute coordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C7/06
CPCG01C7/06
Inventor 许崇帮周幸宇
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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