# [1]杨永红,夏元波,王杰聪,等.边坡约束条件下的三维动态视距计算方法[J].东南大学学报(自然科学版),2020,50(5):983-990.[doi:10.3969/j.issn.1001-0505.2020.05.026] 　Yang Yonghong,Xia Yuanbo,Wang Jiecong,et al.Calculation method for 3D dynamic sight distance under the control of slope constraint[J].Journal of Southeast University (Natural Science Edition),2020,50(5):983-990.[doi:10.3969/j.issn.1001-0505.2020.05.026] 点击复制 边坡约束条件下的三维动态视距计算方法() 分享到： var jiathis_config = { data_track_clickback: true };

50

2020年第5期

983-990

2020-09-20

## 文章信息/Info

Title:
Calculation method for 3D dynamic sight distance under the control of slope constraint

1华南理工大学亚热带建筑科学国家重点实验室, 广州 510641; 2长沙理工大学公路工程教育部重点实验室, 长沙 410114
Author(s):
1State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China
2Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410114, China

Keywords:

U412.3
DOI:
10.3969/j.issn.1001-0505.2020.05.026

Abstract:
In order to achieve the fitting of the established road alignment and accurately calculate the three-dimensional(3D)dynamic sight distance of the highway under the constraint of the right side slope, the road length, horizontal azimuth and vertical angle were adopted as the design parameters. A 3D calculation model was established for highway alignment based on the spline curve. The Gauss-Legendre quadrature formula was used to achieve the highway centerline coordination. The pavement and slope triangulation network were setup based on the characteristic points of roadside lines, considering the geometric relationship among the height of the driver’s sightline, the driving trajectory and the tangent plane of the boundary. The 3D sight distance calculation model was proposed based on the spatial alignment, and the solving equation for the minimum value of sight distance was deduced. By the case of a two grade highway with a section of right turn, the 3D dynamic sight distance was calculated and compared with the calculation method for lateral clear distance. The results show that the 3D dynamic sight distance values are greater than that of the lateral clear distance in the section of the sag vertical curve. However, there are safety risks for adopting the lateral clear distance auditing in the section of the crest vertical curve.The safety threshold of the crest vertical curve radius 1/S1 decreases with the decrease of the driver’s sightline height, while the safety threshold of horizontal curve radius 1/S2 increases with the increase of the vertical curve radius.

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