Triangular elevation measuring method applied in highways in mountain areas

A triangular elevation and highway technology, applied in the field of measurement, can solve the problems of large elevation difference, low efficiency of elevation control measurement, complex terrain, etc., achieve high measurement efficiency, eliminate the effect of atmospheric refraction and earth curvature

Inactive Publication Date: 2019-07-23
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of complex terrain, large height difference, and low efficiency of elevation control measurement in the elevation control measurement of highway construction in mountainous areas, so as to improve the accuracy of elevation control measurement and field measurement efficiency in mountainous areas
[0007] In order to achieve the above objectives, a triangular elevation measurement method for mountainous expressways is designed, using a surveying robot, namely a total station, to observe opposite directions and play the role of elevation transfer, so as to solve the complex terrain and large height difference in the elevation control measurement of mountainous expressways , The low efficiency of elevation control measurement, the operation method is as follows:

Method used

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  • Triangular elevation measuring method applied in highways in mountain areas
  • Triangular elevation measuring method applied in highways in mountain areas
  • Triangular elevation measuring method applied in highways in mountain areas

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Embodiment 1

[0027] In this case, combined with the third-class leveling project of Shanxi Jingxing Expressway, two measuring robots are used to carry out the intermediate method and the method of facing triangular elevation measurement at the same time, so as to solve the problem of complex terrain, large elevation difference, and elevation control measurement in mountainous expressway construction elevation control measurement. Low efficiency problem. To improve the measurement accuracy of mountain elevation control and field measurement efficiency.

[0028] Step one, set up a triangular elevation measuring instrument

[0029] Including total station, prism, base, A and N are special bases with leveling device and fixed prism height placed on the level point, Z1, Z2,...Zn are total stations placed on a tripod, B, C,...M is a prism placed on a tripod and an ordinary base. The total station is set up at any position between the two prisms by the free station method, and the total station and p...

Embodiment 2

[0037] Triangular elevation measurement verification

[0038] 1 data collection

[0039] Taking the height difference measurement between the benchmarking points JX247-JX249 of the Yellow River Bridge on Jingxing Expressway as an example, using 2 TS15s, equipped with an on-board automatic measurement and recording program, the triangle elevation between the two benchmarking points is measured by the intermediate method. The height difference can obtain the height difference of each measurement section and the height difference between the two standard points, and compare it with the level height difference. Refer to Table 1 for the technical requirements of field triangle elevation measurement.

[0040] Table 1 Technical requirements for optical distance measurement and triangulation elevation measurement

[0041] grade Side length / m Number of rounds during distance measurement Vertical angle measurement rounds Poor index difference / (″) The vertical angle between measurement rou...

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Abstract

The invention relates to a triangular elevation measuring method applied in highways in mountain areas. A total station is erected at a place inter-visible to two prisms by using two total stations bymeans of a free station method; the height difference between an observation station and the two prisms is observed, and a round-trip measurement height difference between a starting point and an endpoint of a measuring section is measured indirectly; and bilateral observation is adopted, the height difference between A and B is an average value of the height difference measured by the two totalstations, and the height difference is obtained through calculation. According to the above analysis, a method of simultaneous bilateral indirect height difference observation method by a measuring robot and double observation stations is adopted, so that the influences of atmospheric refraction and the earth curvature are eliminated. Theoretical analysis and practice prove that the method can achieve the precision of the third-class leveling, and the measurement efficiency is much higher than that of the traditional level.

Description

[0001] [Technical Field] [0002] The invention relates to the field of measurement technology, specifically a method and application for the triangular elevation measurement of mountain expressways. [0003] [Background technique] [0004] In the prior art, the elevation control measurement of mountain expressway usually requires third-class leveling. For example, in the elevation control measurement process of Jingxing Expressway in Shanxi, the Yellow River Bridge is a key control project for the entire line, with a total length of 1.1km and the upper part of the main bridge The structure is a (71+5×128+71)m prestressed concrete continuous rigid frame, the highest pier is 81 meters, and it is a mountainous road, the terrain is difficult, the elevation difference is large, and the traditional geometric leveling method is slow. There are many stations and the accumulated error is large, which reduces the accuracy of elevation measurement, and the elevation measurement cannot be compl...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 刘铁龙刘鹏马超李昊杨勇
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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