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Correction Method of Bridge Triangular Elevation Transfer Based on Temperature

A triangular elevation and bridge technology, applied in the field of surveying and mapping, can solve the problems of not meeting the requirements of high-speed railway parameters, unknown authenticity, large differences, etc., and achieve the effects of avoiding repeated observations, saving costs, and improving efficiency

Active Publication Date: 2016-12-28
CHINA RAILWAY SHANGHAI DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the current multiple measurement results often cause large differences, the authenticity is unknown, and it does not meet the parameter requirements of the high-speed railway specification

Method used

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  • Correction Method of Bridge Triangular Elevation Transfer Based on Temperature
  • Correction Method of Bridge Triangular Elevation Transfer Based on Temperature
  • Correction Method of Bridge Triangular Elevation Transfer Based on Temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Embodiment: first adopt as figure 1 In the triangular elevation measurement method that does not measure the height of the instrument and the height of the prism, the observation instrument 3 is used to measure the distance between the mandatory center point 1 on the bridge and the mandatory center point 2 under the bridge. Since the mandatory center point 1 on the bridge and the There are bridge piers 4 between the forced alignment points 2 under the bridge, so the deformation of the piers 4 due to temperature changes will affect the height difference between the forced alignment points 1 on the bridge and the forced alignment points 2 under the bridge, that is, the elevation measurement result.

[0019] The influence of temperature on the height difference between the upper and lower points of the pier is mainly reflected in the linear expansion and contraction deformation of pier 4 caused by temperature changes. Find out the law of linear expansion and deformation of...

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Abstract

The invention relates to the field of mapping, and in particular relates to a temperature-based bridge triangulated height transmission correcting method. The correcting method is characterized by at least comprising the following steps of: selecting two measurement results of bridge triangulated height measurement and environment temperatures in measurement at will; according to the environment temperatures, calculating bridge deformation along with the environment temperature variation between the two triangulated height measurement; and correcting any one of the two measurement results according to the bridge deformation. The method has the advantages that the corrected result satisfies data precision requirements, repeated observation can be avoided, the efficiency is improved and the cost is saved.

Description

technical field [0001] The invention relates to the field of surveying and mapping, in particular to a method for correcting bridge triangle elevation transfer based on temperature. Background technique [0002] When conducting second-class leveling, when the height difference between two points is greater than 3 meters, it is difficult to measure the height difference between two points by using the traditional geometric leveling method. For this reason, the elevation transfer can be carried out by using the triangular elevation measurement method which does not measure the height of the instrument and the height of the prism. [0003] After measuring the height difference between the two points on the bridge and under the bridge, the height difference between the two points is not fixed, but changes with the influence of external environmental factors. The work of measuring the height difference between the two points is mainly carried out at night, so the influence of su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/00
Inventor 王文庆王继亮徐幸福傅丽娟宋广林
Owner CHINA RAILWAY SHANGHAI DESIGN INST GRP
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