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Large bridge clearance height measurement method

A technology of headroom height and measurement method, which is applied in the directions of height/level measurement, measuring device, surveying and navigation, etc., can solve the problems of poor reliability and headroom height measurement technology, so as to ensure reliability and credibility, improve operation speed, The effect of ensuring safe passage

Inactive Publication Date: 2013-06-26
SOUTHEAST UNIV
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Problems solved by technology

[0016] Purpose of the invention: In view of the deficiencies in bridge headroom height measurement technology such as the triangular elevation measurement method in the prior art is greatly affected by the visibility conditions, and the GPS measurement method has no checking conditions for the elevation direction resulting in poor reliability of the results, the present invention provides a A New Method for Real-time Headroom Height Measurement of Large Bridges with High Accuracy and Strong Reliability

Method used

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Embodiment

[0048] The calculation example data uses the measurement data of the bottom elevation of the Yangtze River Bridge within the navigation range of a certain city to obtain the accurate navigation clearance height. The measured data, after preliminary processing, are shown in Table 1:

[0049] Table 1 Calculation table of the bottom elevation of the Yangtze River bridge in a certain city (unit: meter)

[0050]

[0051] Considering the limit deflection and real-time water surface elevation, the corresponding clearance height can be obtained, as shown in Table 2:

[0052] Table 2 Calculation table of real-time clearance height of Yangtze River Bridge in a certain city (unit: meter)

[0053]

[0054] The embodiment illustrates that it is feasible to use this method to measure the real-time headroom height of a large bridge, and the accuracy can reach centimeter level, which meets the requirements for passing ships.

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Abstract

The invention discloses a large bridge clearance height measurement method. The method comprises the following steps: using a GPS network RTK (real time kinematic) technology and a total-station precise triangular elevation measurement technology to obtain the elevation of points in a bridge floor in real time, carrying out bridge cross slope, bridge thickness and repairing track correction to obtain the elevation of a track beam bottom, and subtracting the elevation of the track beam bottom from the real-time water surface elevation to obtain the clearance height of a corresponding point. The method allows the beam bottom elevation of a large bridge to be measured, guarantees the reliability and the credibility of the bridge clearance height data, and can be widely used in the measurement of the practical navigation clearance height to ensure the safe pass of a ship.

Description

technical field [0001] The invention relates to bridge monitoring technology, in particular to a method for measuring the headroom height of a large bridge. Background technique [0002] As an important hub connecting the traffic network on both sides of navigable rivers, the number of large bridges is constantly increasing, gradually connecting the inland road network and railway network into a whole, which is of great significance to the development of my country's transportation industry. However, the construction of the bridge will also form an obstacle to the navigation of ships, which virtually increases the difficulty of ship navigation, and even causes ships to collide with bridges, causing major accidents such as ship damage and bridge damage, causing losses to the country and people's lives and properties, and at the same time causing serious damage to the water. Safety supervision and management bring enormous pressure. In order to minimize the negative impact of...

Claims

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Application Information

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IPC IPC(8): G01C5/00
Inventor 高成发生仁军陈伟荣厦炎时小飞
Owner SOUTHEAST UNIV
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