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Curve corner and deflection direction determination method and application of road design curve

A deflection direction and road design technology, applied in special data processing applications, geometric CAD, etc., can solve the problems of cumbersome calculation and judgment of deflection direction, and achieve the effect of simple and clear calculation method, easy operation, and simplified judgment steps

Active Publication Date: 2021-04-23
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the complicated problem of calculating the curve angle and judging the deflection direction of the line engineering plane in the prior art, and to provide a method for determining the curve angle and deflection direction of the road design curve

Method used

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  • Curve corner and deflection direction determination method and application of road design curve
  • Curve corner and deflection direction determination method and application of road design curve
  • Curve corner and deflection direction determination method and application of road design curve

Examples

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Effect test

Embodiment 1

[0060] The design and construction of railway and highway engineering line planes involve a large number of curve angle calculations and curve deflection direction judgments. However, the existing intersection method for calculating curve angles and judging curve deflection directions is cumbersome and complicated, which has led to serious problems in engineering line plane design. The steps are cumbersome, so it is necessary to develop a simpler method for calculating the curve rotation angle and determining the deflection direction of the curve.

[0061] In order to solve the above technical problems, the inventor proposed a method for determining the curve corner and deflection direction of the road design curve in this application, see figure 1 , including the following steps:

[0062] S1: Obtain the curve type of the target curve and the first straight line and the second straight line respectively connecting the two ends of the target curve according to the road graphic ...

Embodiment 2

[0125] The application also discloses that the method for determining the curve angle and deflection direction of the road design curve is applied to the stakeout by the polar coordinate method of the total station engineering survey, and is used to calculate the size of the stakeout angle in polar coordinates and determine the deflection direction of the stakeout angle.

[0126] Said application includes the following steps:

[0127] refer to Figure 5 , establish a coordinate system, and determine the coordinates of the mirror point, backsight point, and stakeout point in this coordinate system, determine the first straight line with the mirror point and backsight point of the total station, and its azimuth points to the direction of the backsight point; The mirror point of the instrument and the stakeout point determine the second straight line, and its azimuth points to the direction of the stakeout point; the mirror point of the total station is the intersection of the fi...

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Abstract

The invention discloses a curve corner and deflection direction determination method and application of a road design curve, and relates to the technical field of road plane alignment design and construction.The curve corner and deflection direction determination method comprises the steps: obtaining the curve type of a target curve and a first straight line and a second straight line which are connected to the two ends of the target curve respectively; randomly taking two points on the first straight line and the second straight line respectively, and calculating the orientation of the first straight line and the orientation of the second straight line; obtaining a minimum rotation angle value of the orientation of the first straight line deflected to the orientation of the second straight line; obtaining a curve corner and a deflection direction of the target curve according to the type of the target curve and the minimum corner value. The invention also discloses an application of the method in engineering surveying by adopting the total station. The calculation method is simple and clear, it is only needed to determine whether the target curve is a common curve or a turn-back curve in the calculation process, and curve corner value calculation and deflection direction do not need any judgment step.

Description

technical field [0001] The invention relates to the technical field of road plane alignment design and construction, in particular to a method for determining the curve corner and deflection direction of a road design curve and its application. Background technique [0002] The planes of traffic engineering lines such as railways and highways are composed of straight lines and curves. Among them, the curves include circular curves and transitional curves, and the transitional curves are divided into clothoids and cubic parabolas. The basic structural form of a complete line plane curve is straight line + transitional curve + circular curve + transitional curve + straight line. Its combined transformation forms include: straight line + circular curve + straight line form, straight line + transitional curve + circular curve + straight line form, straight line + circular curve + transitional curve + straight line form, etc. Regardless of the type of plane curve, once the two ...

Claims

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Application Information

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IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 杨维裕
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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