高速公路中央分隔带、同向分隔带布置型式及开口研究

发布时间：2018-05-31 04:33

本文选题：高速公路 + 换道模型　；参考：《长安大学》2014年硕士论文

【摘要】：中间带作为高速公路的重要组成部分，其布置型式、宽度、为保证高速公路大修养护以及紧急状况下救援抢险车辆能够驶入到对向车道上而设置的开口等都会对高速公路的交通安全、通行能力造成影响。所以为了减少中间带处的交通事故，提高高速公路维修时的运行效率，有必要对中间带型式及中分带开口进行研究。高速公路单侧扩建方案若保留原有的中分带，则原有中分带将成为分隔同向车流的同分带。同分带两侧车辆的运行状况与中分带不同，同分带的型式及互通立交及服务区前后同分带开口对高速公路的交通安全至关重要。我国对同分带布置型式及开口研究较少，所以有必要在基于安全及运行效率的情况下，对同分带型式及互通立交、服务区前后开口进行研究。论文在总结国内外相关研究，分析我国高速公路中间带事故特点的基础上，通过中间带宽度、护栏型式、路缘石型式及设置等方面对中间带的型式进行了研究，提出了采用分设型和组合型波形梁护栏以及整体式和分离式混凝土护栏时的中间带合理宽度建议值；在分析影响同向带交通安全因素的基础上，通过同向带两侧硬路肩宽度、同分带宽度、护栏型式、路缘石的设置等方面对同向带的型式进行了研究，提出了用分设型和组合型波形梁护栏以及整体式和分离式混凝土护栏时的同向带合理宽度建议值；通过分析高速公路大修采用半幅封闭半幅通车方案时施工段的长度，提出了适用于高速公路大修的基本路段开口间距值；通过对高速公路中分带开口分析，运用车辆换道理论，分别建立了计算中分带开口长度的圆曲线换道模型和缓和曲线换道模型，提出了相应模型下的中分带开口长度建议值；在分析同分带开口位置影响因素的基础上，对高速公路互通立交及服务区等设施前后对同分带开口位置进行了研究，提出了同分带开口位置距互通立交、服务区前后的长度值以及两处同分带开口位置的间距值；通过分析同分带开口处车辆运行特性，根据同分带左侧硬路肩的设置与否，运用车辆换道理论和分岔、合流理论，建立了计算同分带开口长度的缓和曲线模型和渐变型模型，，提出了相应模型下的同分带开口长度建议值。
[Abstract]:As an important part of freeway, the intermediate zone is arranged in type and width. In order to ensure the maintenance of highway overhaul and emergency rescue vehicles can drive into the lane and set openings will have an impact on the traffic safety and capacity of the highway. Therefore, in order to reduce traffic accidents and improve the efficiency of highway maintenance, it is necessary to study the type of intermediate belt and the opening of intermediate zone. If the original middle separation zone is retained in the one side extension scheme of expressway, the original middle separation zone will become the same separation zone of the same direction traffic flow. The running condition of the vehicles on both sides of the same belt is different from that of the middle zone. The type of the same belt and the opening of the interchange and the service area are of great importance to the traffic safety of the expressway. There is little research on the layout and opening of the same zone in our country, so it is necessary to study the type of the same zone and the interchanges and the front and rear openings of the service area based on the safety and operation efficiency. On the basis of summing up the relevant research at home and abroad and analyzing the characteristics of the accidents in the intermediate zone of our country, this paper studies the type of the intermediate belt through the width of the intermediate zone, the type of guardrail, the type and setting of the road edge stone, etc. In this paper, the reasonable width of the intermediate band is suggested when the concrete guardrail is divided and combined, and the width of the hard shoulder on both sides of the codirectional belt is analyzed on the basis of the analysis of the factors affecting the traffic safety of the same direction belt, and the width of the hard road shoulder on both sides of the same direction belt is analyzed. In the aspects of the width of the same zone, the type of guardrail and the setting of the road edge stone, the type of the same direction belt is studied, and the reasonable width of the same direction belt is suggested when the corrugated beam guardrail is divided and combined, and the reasonable width of the same direction belt is put forward when the concrete guardrail is integrated and separated. Based on the analysis of the length of the construction section when the expressway overhaul adopts the half-block closed half-block train scheme, the paper puts forward the value of the opening spacing of the basic section suitable for the expressway overhaul, and through the analysis of the opening in the middle of the freeway, applies the theory of changing the way of the vehicle. The circular curve change model and the transition curve change model are established to calculate the opening length of the middle splitter respectively, and the suggested values of the opening length of the middle split band under the corresponding model are put forward, and on the basis of the analysis of the factors affecting the opening position of the same split band, This paper studies the location of the opening of the same zone before and after the expressway interchange and service area, and puts forward the distance between the opening position of the same zone and the interchange, the length of the service area before and after the service area and the distance between the opening positions of the same zone and the same zone. Based on the analysis of the running characteristics of the vehicle at the opening of the same belt, according to the setting of the hard shoulder on the left side of the same belt, the model of the transition curve and the model of gradual variation for calculating the opening length of the same belt are established by using the theory of changing the lane and the bifurcation and the theory of confluence. The suggested opening length of the homogenous band under the corresponding model is proposed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U412.366;U417

【参考文献】