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Bridge line shape detection method based on opposite side height difference measurement

A detection method and height difference technology, applied in the direction of height/level measurement, measuring instruments, measuring devices, etc., can solve problems such as difficult automation, difficult traffic suspension, and hidden safety hazards, so as to improve work efficiency, improve measurement accuracy, and reduce measurement the effect of time

Active Publication Date: 2021-08-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The geometric leveling method needs to be inspected when the bridge is in a static state. However, it is difficult to suspend traffic on the expressway when the bridge is inspected. The surface is always in a state of vibration, and the use of geometric leveling on expressway bridges will violate the technical requirements of the "Building Deformation Measurement Specifications", and the observation accuracy cannot meet the national second-class leveling technical requirements
At the same time, due to the inability to suspend traffic, all kinds of driving vehicles have brought great potential safety hazards to the personnel and instruments performing leveling on the bridge deck, seriously affecting the life safety of surveyors
[0006] In addition, it is difficult to realize the automation of geometric leveling at present. According to the requirements of the specification, a station-by-station observation procedure must be carried out. At least three people at each station cooperate with manual observation and manual ruler. The observation time is long, and There are many factors affecting the measurement accuracy, which requires a lot of people and financial resources

Method used

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  • Bridge line shape detection method based on opposite side height difference measurement
  • Bridge line shape detection method based on opposite side height difference measurement
  • Bridge line shape detection method based on opposite side height difference measurement

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Experimental program
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Effect test

Embodiment 1

[0046] Such as Figure 1-2 As shown, this embodiment provides a bridge alignment detection method based on the measurement of the height difference between opposite sides. Three detection points are set on the bridge surface, and the steps are as follows:

[0047] S1. Set the benchmark point B on the stable ground other than the bridge (other than 0# platform) 1 , B 2 , set the alignment detection point X on the bridge surface 1 、X 2 and x 3 , set P as a free station, install a total station at point P, and place a total station at point B 1 and detection point X 1 、X 2 、X 3 Set up prisms on the top, observe point P to benchmark point B 1 and detection point X 1 、X 2 、X 3 The slope distance S B1 , S X1 , S X2 , S X3 And point P to benchmark point B 1 and detection point X 1 、X 2 、X 3 Zenith distance V B1 , V X1 , V X2 , V X3 , according to the formulas (1) and (2) to get the benchmark point B 1 to detection point X 1 height difference h B1X1 , detecti...

Embodiment 2

[0062] A bridge alignment observation method based on the height difference measurement of opposite sides, the steps are as described in Embodiment 1, the difference is that in step S4, the bridge deck elevation alignment curve is drawn in the following way: with the detection point as the abscissa, the detection point elevation is the ordinate, and the height of the detection point is marked with the height of the column, and the height of each detection point is connected by a broken line to visually display the measurement result;

[0063] The drawing method of the bridge deck elevation linear curve table is as follows: take each detection point as the header, and mark the corresponding elevation data in the lower row of the header.

[0064] The linear curve of the bridge deck elevation is as follows: image 3 As shown, the bridge deck elevation linear curve table is shown in Table 1;

[0065] Table 1: Bridge Deck Elevation Linear Curve Table

[0066] Monitoring...

Embodiment 3

[0075] A bridge alignment observation method based on the height difference measurement of opposite sides, the steps are as described in Embodiment 1, the difference is that in step S1, the inclination distance S B1 , S X1 , S X2 , S X3 and zenith distance V B1 , V X1 , V X2 , V X3 The observation precision adopts the third-class settlement observation trigonometric height measurement technology requirements: the error in the angle measurement of the first measurement round: ≤1.0", the error in the distance measurement ≤ (1.0mm+1.0ppm).

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Abstract

The invention relates to a bridge line shape detection method based on opposite side height difference measurement, and belongs to the technical field of bridge engineering. The method comprises the following steps: S1, obtaining the height difference between bridge floor detection points, and S2, calculating the difference value of the height difference generated by human, environment, instruments and the like through two known ground level base points, obtaining the real height difference of any two observed points, then substituting the real height difference obtained in the step S2 into the step S3, correcting the height difference of each monitoring point of the bridge floor, obtaining the actual elevation of each monitoring point, drawing a corresponding bridge floor elevation linear curve graph and a bridge floor elevation linear curve table according to the elevation data obtained in the step S3, and visually displaying a measurement result. The problem that a measuring instrument moves frequently is effectively solved, measuring errors caused by bridge vibration are avoided, and the measuring precision is improved. In addition, according to the detection method, a plurality of prisms can be arranged, and automatic observation is performed on each detection point, so that the bridge deck linear measurement time is greatly shortened, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a bridge alignment detection method based on the height difference measurement of opposite sides, and belongs to the technical field of bridge engineering. Background technique [0002] In various types of large and medium-sized bridge structures, the main girder is the main load-bearing member that directly bears the traffic load. The internal force and deformation of the main girder will change accordingly with the distribution of the live load and the continuous change of its size, and promote the main bridge. The whole system tends to a new equilibrium. Live loads and other external forces repeatedly act on the main girder during operation, which may easily cause fatigue damage to the main bridge box girder and affect the safe operation of the structure. Therefore, the determination of the main girder's stress, internal force distribution, and material properties should be a major bridge inspection. content. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00G01C15/00
CPCG01C5/00G01C15/00
Inventor 田长进王岩张树峥王登杰邱凯
Owner SHANDONG UNIV
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