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Construction drawing deepening design method for curved steel box bridge

A technology for deepening design and construction drawings, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problems of inability to effectively express curved surfaces, inability to use steel box bridges to deepen design, and inability to use workshop blanking for detailed drawings. The effect of fixed-length material damage, controllable deployment accuracy, and correct elevation of control points

Active Publication Date: 2018-09-14
CHINA 19TH METALLURGICAL CORP
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Problems solved by technology

Steel box bridges have also developed from ordinary linear steel box bridges to curved steel box bridges, and now steel box bridges with characteristics such as vertical curves, flat curves, height gradients, width gradients, and transverse slope gradients have been designed. The detailed design method of steel box bridges is only applicable to straight steel box bridges, and cannot effectively express the surface determined by various curves in curved steel box bridges, and the detailed drawings without expansion cannot be used for workshop blanking
[0003] The patent application with the patent number CN201610273819.4 discloses a method for detailed design of aluminum alloy formwork based on BIM. The technical solution disclosed in this method can improve the accuracy and efficiency of the detailed design of aluminum Detailed design of steel box bridges with vertical curves, horizontal curves, height gradients, and transverse slope gradients

Method used

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  • Construction drawing deepening design method for curved steel box bridge
  • Construction drawing deepening design method for curved steel box bridge
  • Construction drawing deepening design method for curved steel box bridge

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Embodiment 1

[0035] a. to figure 2 Take the road design data diagram shown as an example, extract the elevation data of the ten points A1~A5 and B1~B5 on the two vertical lines above and below the surface design diagram, and then extract the elevation data from image 3 Extract the pre-camber data corresponding to points A1~A5 and B1~B5 from the shown pre-camber design data diagram;

[0036] b. Use the formula (stakeout elevation=theoretical elevation×1000+pre-camber-520000) to calculate the corresponding lofting elevations of the above points, pay attention to the conversion of units during the calculation, and only need the relative elevation for stakeout, take point A1 as For example, the stakeout elevation=523.589×1000+0-520000=3589, calculate the stakeout elevation of the remaining points in turn;

[0037] c. Use CAD to extract the projection plane coordinates of each point, use the point command of the CAD drawing software to draw points at the points A1~A5 and B1~B5, and obtain th...

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Abstract

The invention discloses a construction drawing deepening design method for a curved steel box bridge, which can provide a curved surface unfolding deepening drawing for feeding in a workshop. The elevation and the pre-arch degree of each point of the curved surface in a road design drawing are calculated to obtain the setting out elevation of the point, and the projection plane coordinates of eachpoint are obtained by using a drawing software and the three-dimensional coordinates of the position are obtained. A spline curve is generated to be drawn into a curved surface unfolding diagram, andthe unfolding drawing is marked to obtain the actual feeding size in the workshop. According to the invention, the problem of unfolding the surface of the steel box bridge is solved, the precision ofthe unfolding is controllable, and the loss of the size-fixed material is reduced. The curved steel box bridge after installation is measured, the control point elevation is correct, and the plane curvature is consistent with the design drawing.

Description

technical field [0001] The invention relates to the field of design of steel box bridges, in particular to a construction drawing deepening design method of curved steel box bridges. Background technique [0002] With the rapid development of municipal road bridges and highway bridges, steel box bridges are being used more and more widely due to their characteristics of light weight, large span, fast construction, and little impact on existing traffic. Steel box bridges have also developed from ordinary linear steel box bridges to curved steel box bridges, and now steel box bridges with characteristics such as vertical curves, flat curves, height gradients, width gradients, and transverse slope gradients have been designed. The detailed design method of steel box bridges is only applicable to straight steel box bridges, and cannot effectively express the surface determined by various curves in curved steel box bridges, and the detailed drawings that have not been expanded ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 刘承权刘昌文甘立全石朝华
Owner CHINA 19TH METALLURGICAL CORP
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