基于横断面的公路曲线桥梁行车安全分析与保障技术研究

发布时间：2018-04-08 08:09

本文选题：曲线桥梁　切入点：横断面　出处：《吉林大学》2017年硕士论文

【摘要】：作为一个典型的道路环境突变段,曲线桥梁的行车安全性不容乐观。无论是道路线形还是道路景观,曲线桥梁段与其他路段有着极大的差别。因此,对于存在曲线桥梁的路段来说,曲线桥梁的行车安全是整个路段的短板,提高曲线桥梁行车安全性就能极大提升整条道路的安全性,所以公路曲线桥梁行车安全性评价与保障技术至关重要。论文通过介绍了曲线桥梁线形、纵断面、横断面、行车视距以及构造对其行车安全性的影响,通过分析事故发生率的各项安全性影响因素,确定曲线桥梁的横断面布置形式和曲线段的加宽方式对行车安全性有重要影响,并作为研究方向。首先,分析传统公路曲线桥梁横断面几何布置形式和曲线段加宽方式,得出其中的安全隐患。其次,建立曲线桥梁安全系数回归模型,并在提出桥梁有效宽度的基础上,推荐了两种曲线桥梁横断面布置形式;通过对曲线桥梁几何参数对行车轨迹行为的作用机理和规律进行研究,建立不同于传统的基于运行车速设计理论并充分考虑驾驶行为特征的不同圆曲线半径的曲线桥梁曲线段加宽值计算和加宽方式,加宽值的计算采时采用内外侧同时加宽的方式,提出各等级公路小半径曲线桥梁的加宽设计指南。最后,在研究速度离散性对行车安全影响的基础上,对曲线桥梁爬坡车道的设置条件、设置方法和爬坡车道的标志标线设置进行了研究;对车辆行驶轨迹横向偏移量和车辆行驶速度数据统计观测,给出了行车道边缘线、对向车道分隔线和振动带的尺寸。
[Abstract]:As a typical sudden change of road environment, the driving safety of curved bridges is not optimistic.No matter the road line or the road landscape, the curve bridge section and other sections of road have great difference.Therefore, for the section with curved bridge, the driving safety of curved bridge is the short plate of the whole section, and the safety of the whole road can be greatly improved by improving the driving safety of the curved bridge.So it is very important to evaluate and guarantee the safety of highway curve bridge.This paper introduces the influence of curve bridge alignment, longitudinal section, cross section, distance of sight and structure on its driving safety.Determining the cross section layout of curved bridge and widening mode of curve section have important influence on driving safety, and as the research direction.Firstly, the traditional highway curved bridge cross section geometry layout and curve section widening mode are analyzed, and the hidden safety problems are obtained.Secondly, the regression model of the safety factor of curved bridge is established, and on the basis of the effective width of the bridge, two types of cross-section layout of curved bridge are recommended.Through the study of the action mechanism and law of the geometric parameters of curved bridges on the driving trajectory behavior,Different from the traditional speed design theory and taking full account of driving behavior characteristics, the widening method of curve section of curved bridge is established, which is different from the traditional design theory of running speed and takes full account of driving behavior characteristics. The widening value of curve section is calculated by using the method of widening both inside and outside side at the same time.A design guide for widening of small radius curve bridges for each class of highway is presented.Finally, on the basis of studying the influence of speed dispersion on driving safety, the setting conditions, setting methods and marking setting of climbing lane of curved bridge are studied.Based on the statistical observation of the lateral deviation of the vehicle track and the speed of the vehicle, the dimensions of the lane edge line, the opposite lane separation line and the vibration band are given.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U492.84;U447

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