Measuring method on the bridge at the second-class benchmarking point

A measurement method and technology of benchmarking points, applied in the field of height measurement, can solve the problems that the measurement accuracy cannot meet the construction requirements, etc., and achieve the effects of widening the leveling measurement range, improving measurement accuracy, and being easy to control

Active Publication Date: 2011-12-21
THE FIRST ENG CO LTD OF CTCE GRP
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Problems solved by technology

At present, the methods for leveling high piers in our country include: using ordinary total station, GPS direct measurement or direct measurement with long tape, the measurement accuracy of this kind of measurement method can no longer meet the construction requirements

Method used

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  • Measuring method on the bridge at the second-class benchmarking point
  • Measuring method on the bridge at the second-class benchmarking point
  • Measuring method on the bridge at the second-class benchmarking point

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Embodiment Construction

[0039] In the present embodiment, the bridge measurement method on the second-class benchmarking point is carried out as follows:

[0040] 1. Set the offline benchmarking point and bridge benchmarking point separately

[0041] Set the first sub-line benchmarking point C1 at the lower part of the first measured pier 1 and at the side of the first measured pier 1; On the ballast retaining wall 3 at the end of the fixed support of the beam at the corresponding position of C1, set the benchmarking point D1 on the first bridge. The benchmarking point must be buried at a position on the beam that is stable and not easily deformed. In other words, choose to bury it on the ballast wall at the end of the fixed support.

[0042] Set the second sub-line benchmarking point C2 at the bottom of the second measured bridge pier 2 at the side position of the second measured bridge pier 2; The second bridge upper benchmark D2 is set on the ballast retaining wall 3 at the end of the fixed supp...

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Abstract

The invention discloses a second-class bench mark on-bridge measurement method, which is characterized in that under-line bench marks and on-bridge bench marks are respectively arranged at a first bridge pier to be measured and a second bridge pier to be measured; by utilizing two known elevation control points which are positioned at different positions, the elevation difference between each elevation control point and each under-line bench mark can be respectively obtained through a back-and-forth measurement mode complying with the line of a level; the elevation difference between each under-line bench mark and each on-bridge bench mark can be measured by utilizing a full-station measurement instrument; the elevation difference between the two on-bridge bench marks can be measured by an electronic level; and finally, the elevation of the first on-bridge bench mark and the second on-bridge bench mark can be obtained according to a compensating computation method. The invention is used for determining the elevation of a high pier, and has the advantages that the measurement process is more convenient and fast, the measurement precision is higher, and the construction requirement can be met.

Description

technical field [0001] The invention relates to a height measurement method, more specifically to a measurement method for determining the height of a high pier. Background technique [0002] At present, various constructions in our country, especially high-speed railway construction, are advancing by leaps and bounds. High piers are common in projects, and the measurement problems of high piers follow. The accuracy of leveling is crucial to the quality of on-site elevation construction. At present, the methods for the leveling of high piers in my country include: direct measurement with ordinary total station, GPS or direct measurement with long tape. The measurement accuracy of this kind of measurement method can no longer meet the construction requirements. Contents of the invention [0003] In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a second-class benchmarking point bridge measurement method for determining the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00
Inventor 张杰胜张宏斌阮仁义刘帅帅刘晓东李文成
Owner THE FIRST ENG CO LTD OF CTCE GRP
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