大连轻轨三号线续建工程普通梁型方案选定

研究目的:以大连轻轨三号线续建工程高架桥为例,研究了梁型方案的比选,以更好地满足桥梁景观设计、工程造价经济合理等方面的要求。研究方法:针对大连地区的地质、地形条件,通过比选的方法,对普通地段桥梁梁型方案,从结构形式、结构体系、材料、施工方法、综合指标等方面进行了探讨研究。研究结果:从受力特点、施工周期、景观效果、施工对环境的影响、经济的合理性以及材料的耐久性等方面综合考虑,确定适合大连地方普通地段的轻轨梁型。研究结论:通过对各种梁型方案的论证,大连轻轨三号线续建工程采用(3~5)-25 m单箱单室预应力混凝土连续箱梁,施工方法采用支架现浇法。

The Project Choice of Common Beam Type in the No.3 Light Rail Line Continuing Construction in Dalian

Research purposes: Take the viaduct of No.3 light rail line continuing construction in Dalian for example,this paper researches the project of comparing and selecting girder shape to reach the demands of bridge aesthetics,safety and cost of bridge engineering. Research methods:Aiming at the geologic and topographic conditions of Dalian and by the methods of comparing and selecting,the research on the structure form,structure system,materials,construction methods and synthetical index of different bridge girder shape were discussed and researched. Research results:Considerated from aspects of bearing forcing character,construction period,sight effect,construction influence to the environment,reasonable economy,and durability of the material,etc,this paper makes sure the light rail beam suitable for the common district in Dalian. Research conclusions:By argumentation the projects of all kinds of beam type,the No.3 light rail line continuing construction in Dalian adopts(3~5)-25 m single-box single cell prestressed concrete continuous beam and construction method adopts supporting frame and casting in site method.