CN103729527A - Road side boundary design method - Google Patents
Road side boundary design method Download PDFInfo
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- CN103729527A CN103729527A CN201210385913.0A CN201210385913A CN103729527A CN 103729527 A CN103729527 A CN 103729527A CN 201210385913 A CN201210385913 A CN 201210385913A CN 103729527 A CN103729527 A CN 103729527A
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- side boundary
- represent
- plane normal
- center line
- normal curve
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Abstract
The invention relates to a novel road side boundary design method. According to the road side boundary design method, a road side boundary is represented by a plane normal curve, and meanwhile a novel offset-distance changing function is provided. When the plane normal curve is used for representing the side boundary, line types of a central line do not need considering, a calculation model is simple, and designing is convenient. The offset-distance changing function is obviously characterized in that side boundary has a variable starting point and an end point without turning points, the curvature change changes from big to small and then to big, the change meets the running track of an automobile, the side boundary is smooth in line type, and the area of a road can be reduced. The road side boundary design method overcomes the defects of traditional linear distance changing and high-level parabola distance changing that the curvatures of the variable starting point and the end point are discontinuous, turning points exist, and the running track of the automobile is not met; when the central line is a curve, the width of the side boundary of the end with a large offset distance is large, and the width of the side boundary of the end with a small offset distance is not enough. The method can be applied to design of medial strips and side strips of roads.
Description
Technical field
The present invention relates to horizontal alignment design of road, specifically a kind of highway sideline method for designing.
Background technology
In horizontal alignment design of road, there is a maximum feature: Ordinary Rd sideline all refers to the Plane normal curve being connected to form from the point of the plane normal direction offset distance (abbreviation offset distance) of center line any point, as the boundary line of road, median strip and the non-dividing strip of machine etc.The normal direction curve forming when offset distance is certain value is equidistant curve, otherwise is displacement curve.Tradition displacement curve generally adopts straight line displacement or parabola of higher degree displacement [document 1, P32, specification of the highway route design (JTG D20-2006), People's Transportation Press], such displacement curve has two deficiencies: (1) variation starting point and terminal curvature are discontinuous, there is break, do not meet traval trace; (2) when center line is curve, can cause the larger end of offset distance sideline width excessive, offset distance is inadequate compared with small end sideline width.
Summary of the invention
The object of the invention is to work out a kind of highway sideline method for designing, utilize the highway sideline that the method designs to have the displacement curve that meets traval trace, this method can overcome some shortcomings of the prior art.
To achieve these goals, technical scheme of the present invention is: a kind of highway sideline method for designing, is characterized in that the method comprises the following steps: A, the Plane normal curve model of structure based on road axis,
, wherein
represent certain some pile No. on center line,
,
represent this planimetric coordinates,
represent this position angle, center line left side
, right side
; B, on described Plane normal curve model basis, utilize offset distance to change function and calculate the distance between described highway sideline and center line, described offset distance changes function and is
,
represent displacement scale-up factor,
represent that Plane normal curve any point is apart from the length of starting point correspondence on center line,
represent centerline length corresponding to Plane normal curve terminus,
represent respectively the center line offset distance that Plane normal curve terminus is corresponding.
Advantage of the present invention is: proposed sideline and adopted Plane normal curve to describe, and set up corresponding mathematical model; Propose new offset distance and changed function, it is that sideline changes starting point and terminal without break that this offset distance changes function distinguishing feature, and curvature changes and arrives greatly from big to small again, and this variation meets traval trace, the linear smoothness in sideline, round and smooth, and can reduce path area; Overcome the deficiency of traditional straight line displacement and parabola of higher degree displacement: (1) variation starting point and terminal curvature are discontinuous, have break, do not meet traval trace; (2) when center line is curve, can cause the larger end of offset distance sideline width excessive, offset distance is inadequate compared with small end sideline width.The method also can be applicable to the median strip of road, the design that side is divided band.
Accompanying drawing explanation
Fig. 1 Plane normal curve schematic diagram.
Embodiment
In figure, 1 is road axis, and 2 is normal direction curve.
Highway sideline method for designing comprises four steps.
Step 1: road axis is all joining end to end and formed " getting lines crossed " by a series of straight lines, circular curve, adjustment curve.Can adopt center line computation model to describe [document 2:P521-525, Yuan Shengqiang, Design Object Model of Road Plane Alignment, Tongji University's journal, 1997.10].By center line computation model, can try to achieve easily coordinate, the position angle of arbitrary pile No. on center line.
Step 2: on center line any point pile No. description value be (
,
,
,
),
represent this pile No.,
,
represent this planimetric coordinates,
represent this position angle.Sideline adopts Plane normal curve model (formula 1) to describe.We stipulate center line left side
, right side
;
for offset distance changes function.
Step 3: in highway sideline design, different offset distances changes function road vehicle is travelled and produced a very large impact.Traditional offset distance changes function and generally adopts straight line displacement or parabola of higher degree displacement, Shortcomings.At this, propose a kind of new offset distance and change function (formula 2).
In formula (2),
represent displacement scale-up factor,
represent that Plane normal curve any point is apart from the length of starting point correspondence on center line,
represent centerline length corresponding to Plane normal curve terminus,
represent respectively the center line offset distance that Plane normal curve terminus is corresponding.
Claims (1)
1. a highway sideline method for designing, is characterized in that the method comprises the following steps: A, build the Plane normal curve model based on road axis,
, wherein
represent certain some pile No. on center line,
,
represent this planimetric coordinates,
represent this position angle, center line left side
, right side
; B, on described Plane normal curve model basis, utilize offset distance to change function and calculate the distance between described highway sideline and center line, described offset distance changes function and is
,
represent displacement scale-up factor,
represent that Plane normal curve any point is apart from the length of starting point correspondence on center line,
represent centerline length corresponding to Plane normal curve terminus,
represent respectively the center line offset distance that Plane normal curve terminus is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385913.0A CN103729527A (en) | 2012-10-12 | 2012-10-12 | Road side boundary design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385913.0A CN103729527A (en) | 2012-10-12 | 2012-10-12 | Road side boundary design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103729527A true CN103729527A (en) | 2014-04-16 |
Family
ID=50453601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210385913.0A Pending CN103729527A (en) | 2012-10-12 | 2012-10-12 | Road side boundary design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103729527A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542406A (en) * | 2003-11-06 | 2004-11-03 | 同济大学 | Method for realizing pile-added location survey in the procedure of road investigation |
| US7152022B1 (en) * | 2002-04-25 | 2006-12-19 | Rajashri Joshi | Application of the ψ-s curve to road geometry extraction and modeling |
| CN101441672A (en) * | 2007-11-19 | 2009-05-27 | 上海通用汽车有限公司 | Design method for transition curve path section |
| WO2011067252A1 (en) * | 2009-12-04 | 2011-06-09 | Robert Bosch Gmbh | Method and controller for determining an intersection trajectory of a curve section of a roadway |
-
2012
- 2012-10-12 CN CN201210385913.0A patent/CN103729527A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7152022B1 (en) * | 2002-04-25 | 2006-12-19 | Rajashri Joshi | Application of the ψ-s curve to road geometry extraction and modeling |
| CN1542406A (en) * | 2003-11-06 | 2004-11-03 | 同济大学 | Method for realizing pile-added location survey in the procedure of road investigation |
| CN101441672A (en) * | 2007-11-19 | 2009-05-27 | 上海通用汽车有限公司 | Design method for transition curve path section |
| WO2011067252A1 (en) * | 2009-12-04 | 2011-06-09 | Robert Bosch Gmbh | Method and controller for determining an intersection trajectory of a curve section of a roadway |
Non-Patent Citations (2)
| Title |
|---|
| 袁胜强: "道路边线设计建模及工程应用", 《上海公路》 * |
| 袁胜强等: "道路平面线形设计对象模型", 《同济大学学报》 * |
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Application publication date: 20140416 |