山區(qū)公路視距檢驗(yàn)技術(shù)研究
[Abstract]:In the course of driving, the road information is mainly obtained from vision. Visual distance is the quantification of road alignment and environment by driver vision, which directly reflects the geometric characteristics of the road itself. Therefore, it is of great significance to study the relationship between sight distance and road alignment for road design, road safety inspection and evaluation. In view of the relationship between road alignment and driving safety, especially the influence of road alignment on visual distance, this paper establishes the visual range inspection model of horizontal and longitudinal sections, develops the road simulation platform again, and compiles the visual distance inspection module. The evaluation standard of road safety is established, and the actual road safety inspection and evaluation work is carried out by using the simulation platform. The results of inspection and evaluation are analyzed in detail, and the reasons are found out. First of all, it analyzes the relevant theoretical knowledge of highway safety inspection, determines the impact of visual distance on traffic safety, and then analyzes the relationship between sight distance and traffic safety in detail from four aspects: road alignment, speed, highway greening and weather. It points out the direction for the establishment of the model. Secondly, taking the road alignment as the starting point, the paper puts forward the idea of using the parking horizon as the test parameter. By using the coordinate method, a model for checking and calculating the parking sight distance of the longitudinal and horizontal sections is established, which satisfies the maximum transverse net distance and the minimum slope length, respectively. Thirdly, based on the established visual range test model, the flow chart of visual range inspection is drawn, the road simulation evaluation platform is redeveloped, and the visual distance test module is compiled. Based on the previous research results, the road safety evaluation standard is established. Finally, a real road is chosen, and the design horizon, the running horizon of V85 and the comparison curve of the model horizon are drawn by using the simulation platform, and the test results and evaluation results are analyzed. The results show that: in the section of horizontal curve, with the increase of the radius of horizontal curve, the distance of sight difference increases gradually, and the dangerous grade of road increases, while in the section of longitudinal slope, with the decrease of the length of longitudinal slope, the difference of sight distance increases gradually. Road hazard levels are also increasing. The research and application of this subject not only complements and consummates the technology of visual field inspection, but also further consummates the research of road safety evaluation technology.
【學(xué)位授予單位】:昆明理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:U412.3
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