【作者】 高鲁宾；

【导师】 孙家驷； 徐生明；

【作者基本信息】 重庆交通大学 ， 道路与铁道工程， 2010， 硕士

【摘要】 山区高速公路的修建已有十余年的历史,目前正处在建设的高峰期。与平原区高速公路相比,山区高速公路具有路线指标偏低、长大纵坡多、高填深挖路基段落普遍、桥隧构造物众多的显著特点。互通式立交作为高速公路的重要组成部分,受主线影响不可避免,在互通式立交的布设时必然受到以上多种约束条件的限制。笔者基于以上约束条件,提出了约束型立交的概念,约束型立交系指受地形、地质、地物建筑、主线标准或相邻连续桥梁、隧道、服务设施等的限制,同时按常规布设难以满足标准、规范规定的立交形式。约束型立体交叉在重庆山区道路上比较普遍。论文以西部交通科技项目《组团城市绕城高速公路规划与技术标准》和重庆市交委科技项目《山区高速公路互通立交规划与技术标准》为依托,以重庆已建高速公路上互通立交设计为基础,对约束型立交的特征和约束条件进行分析,初步建立了约束型立交的类型体系。对于间距约束型立交,从影响立交间距的因素入手,探讨缩短立交间距的途径,初步研究了二次减速理论在约束型立交中的应用,即在立交间距不满足最小间距要求的情况下,考虑利用主线侧的减速车道进行第一次减速,而未完成的减速过程在匝道前段实现,利用砸到进行第二次减速。建立了立交间距的模型,根据立交最小间距确定的理论方法和国内外立交间距的经验,提出了约束条件下互通立交的标准间距和合最小间距,并对小间距立交的设置提出了一些对策和建议措施。对于纵面约束型立交,从克服高差的方式进行研究,提出了展线型立交及其几种展线的形式,即自然展线式、回头展线式、螺旋展线式和利用小环道展线等展线形式,并对几种展线形式的适用条件和展线的关键技术进行了研究。对平面约束型立交,探讨如何灵活采用立交方案以适应地形、地物等的约束条件。最后通过实例的应用,验证立交间距降低的可行性和二次减速理论在约束条件下适用性。更多还原

【Abstract】 There are more than ten years of mountain freeway construction history,and now is at the peak period. Compared with the plain area of freeway,mountain freeway has significant feature of low route indicators,more long- steep longitudinal slope,widespread high filling and dig deep subgrade,many bridge and tunnel,etc. Interchange,as an important part of freeway,inevitably affected by the main line,the layout of the interchange will be restricted by the above conditions.Based on the above constraints,put forward the concept of Constraint-Interchange, Constraint-Interchange means the Interchange restricted by the topography,geology,surface features, the main line standard or continuous bridges, tunnels, service facilities, etc,and difficult to meet the standard requirements if according to conventional design . Constrained interchange in very common in Chongqing mountain roads. The papers relying on the transportation technology projects "Group Urban Belt Freeway Planning and technical standards" and the scientific and technological projects of Chongqing Transportation Committee "Mountain Freeway Interchange planning and technical standards", based on the Interchanges have been built on Chongqing expressway, analyse the characteristics and constraints, initially established the type and system of constraint-interchange. For the Spacing-constrained Interchange, The start from the factors that affect the interchange spacing, to explore ways to shorten the spacing between interchange, preliminary research the appliance of“Secondary reduction theory”in constrained-interchange, and in accordance with theoretical method to determine the minimum spacing and experience of interchange spacing at home and abroad, proposed interchange reasonable spacing and measures of small spacing interchange in constraint conditions; for the longitudinal Constraint-Interchange, study from the way to overcome the height, proposed route-development-interchange and it’s several forms; finally, explored the programs of plane constraint-interchange.更多还原