Method for measuring vertical and horizontal offset of positioning line

A measurement method and line technology, applied in measurement devices, measuring instruments, surveying and navigation, etc., can solve problems such as long formulas, difficulty in adapting to calculation requirements, and inability to directly determine the vertical and horizontal accuracy of design lines, so as to improve work efficiency and reduce Construction cost, strong practicability

Active Publication Date: 2019-11-12
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pile coordinates in the transition curve are usually obtained by Fresnel integration of the power series expansion. This coordinate calculation method has the problem of converting the local coordinate system to the line coordinate system, and it is difficult to adapt to such as "oval", "drop-shaped", etc. The calculation requirements of curve coordinates, in order to hide the calculation accuracy of new curve shapes such as interchange ramp coordinates, usually the power series expansion must be extended to a very high variance, and the formula

Method used

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  • Method for measuring vertical and horizontal offset of positioning line
  • Method for measuring vertical and horizontal offset of positioning line

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Experimental program
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Embodiment 1

[0032] The present invention is realized through the following technical solutions, as figure 1 As shown, a method for measuring the vertical and horizontal offset of a positioning line specifically includes the following steps:

[0033] Step S1: Determine the calculation mileage of the design coordinates of the anchor point, the line direction coordinate azimuth, and the offset distance and deflection angle relationship between the anchor point and the mileage point when the anchor point deviates from the line design line; obtain line element calculation element data.

[0034] After receiving the technical disclosure, review the plane geometric relationship between the positioning point and the mileage point of the line design line against the drawings, and accurately determine the design coordinates of the positioning point and the calculation mileage of the line direction coordinate azimuth angle. When the positioning point deviates from the line design, the positioning point a

Embodiment 2

[0045] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 As shown, further, in order to better realize the present invention, the step S3 specifically refers to: the line element starting point line direction coordinate azimuth, starting point mileage, starting point coordinate value, line element starting point radius, line element end point The radius and line element length are input into CASIO FA-124 in turn, and the integral formula is deduced through the transition curve to obtain the coordinates of the anchor point and the azimuth angle of the line direction coordinates of the anchor point.

[0046] Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Embodiment 3

[0048] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 As shown, the step S4 specifically refers to: check the instrument and the base before the measurement, check whether there is any change in the instrument, the optical plummet of the base, and the leveling tube, and input the temperature and air pressure measured on site in a timely manner after the instrument is installed. , where the minimum degree of air temperature is 0.2°C, and the minimum degree of air pressure is 2hpa; after correcting the measurement accuracy of the total station and measuring the coordinates of the backsight point, it is still necessary to measure the coordinates of at least one control point for verification, and the measurement can only be carried out after the coordinates are correct. .

[0049] Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

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Abstract

The invention belongs to the technical field of measurement, and specifically discloses a method for measuring the vertical and horizontal offset of a positioning line. The method for measuring the vertical and horizontal offset of the positioning line comprises the following steps: step S1, determining the calculated mileage of a positioning point design coordinate and a line direction coordinateazimuth angle, and determining the offset distance and declination angle relationships between the positioning point and the mileage point when the positioning point deviates from the line design line; and obtaining line element solution element data; step S2, selecting an observation point; step S3, obtaining positioning point design data; step S4, collecting observation point coordinates; and step S5, obtaining the offset in the vertical and horizontal directions of the observation point; calibrating the point location and completing the plane positioning measurement when the offset meets the design requirements; and performing correction processing when the offset does not meet the design requirements. The method for measuring the vertical and horizontal offset of the positioning linecan effectively avoid the environmental impact around the positioning point and ensure the reliability of the observed data; the line king-pile coordinate calculation model is unified by using a mitigation curve to deduce an integral formula; and the vertical and horizontal offset of the observation point line is directly determined through comprehensively processing the design and observation coordinate data of the positioning point line.

Description

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Claims

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Application Information

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Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
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