蒙华铁路汉江特大桥总体设计

发布时间：2018-10-23 17:56

【摘要】：研究目的:我国水系发达、河流众多。当铁路与大型通航河流交叉时,桥位选择受线路选线、接线条件、通航防洪、工程投资、施工、维养、社会效益等方面影响;桥型选择不仅要满足功能要求、技术标准,在技术、经济指标、景观效果、施工组织等方面也要全盘考虑。本文结合蒙华铁路汉江特大桥桥位选择、桥型选择、主桥设计等方面成果,重点研究大型跨河桥梁桥式方案的确定和重载铁路矮塔斜拉桥主桥设计。研究结论:通过对蒙华铁路汉江特大桥桥位的选择、桥式方案的确定以及主桥的设计,研究分析得出:(1)大型跨河桥梁的桥位由于受河道条件、通航要求、大型结构受力复杂等方面因素,相邻线位应服从桥位的选择;(2)桥位的选择应结合防洪、通航要求、港口条件、水源特点、地方规划要求、相邻跨河建筑安全距离等综合确定;(3)桥梁结构型式的选择必须在满足功能要求、技术标准的前提下,从技术、经济指标、施工组织、景观效果等方面综合比选;(4)重载铁路设计活载大、疲劳要求高,部分斜拉桥设计应重点关注对结构的强度、疲劳及后期徐变等方面研究,蒙华铁路汉江特大桥矮塔斜拉桥是安全可靠的;(5)该研究成果可应用于铁路大型跨河桥梁设计及重载铁路斜拉桥设计。
[Abstract]:Purpose: our country has developed water system and numerous rivers. When the railway intersects with a large navigable river, the bridge selection is affected by the route selection, connection conditions, navigable flood control, engineering investment, construction, maintenance and maintenance, social benefits, etc. The selection of bridge type should not only meet the functional requirements, but also meet the technical standards. Technical, economic indicators, landscape effects, construction organization and other aspects should also be considered. Based on the achievements in the selection of bridge location, selection of bridge type and design of main bridge, this paper focuses on the determination of beam bridge scheme for large span river bridge and the design of main bridge for heavy haul railway with low tower cable-stayed bridge. Research conclusion: through the selection of bridge location, the determination of bridge scheme and the design of main bridge, it is concluded that: (1) the bridge position of large bridge is subject to river conditions and navigation requirements. The selection of adjacent lines should be combined with flood control, navigational requirements, port conditions, water source characteristics, local planning requirements, and other factors, such as complex forces on large structures, and the selection of adjacent lines should be combined with flood control, navigational requirements, port conditions, water source characteristics, and local planning requirements. (3) the selection of bridge structure type must meet the functional requirements and technical standards, from the technical, economic indicators, construction organization, (4) the design of heavy-haul railway has large live load and high fatigue requirement. The design of some cable-stayed bridges should focus on the structural strength, fatigue and later creep, etc. The low tower cable-stayed bridge is safe and reliable. (5) the research results can be applied to the design of railway bridge beam and heavy haul railway cable-stayed bridge.
【作者单位】：中铁第四勘察设计院集团有限公司;
【分类号】：U442.5

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