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针对大连湾航道面临软土地基、强台风、深水基础等不良的自然条件,在总结以往地锚式斜拉-悬吊协作体系桥特点的基础上,提出自锚斜拉-悬吊协作体系桥。以主跨800 m的大连跨海大桥主航道桥为工程背景,详细介绍了自锚式斜拉-悬吊协作体系的方案设计、构造特点,并就结构的静动力特性、施工步骤、经济性能以及运营阶段悬吊部分端吊索的疲劳问题和施工阶段结构的抗风稳定性进行了深入的分析研究,通过与悬索桥等其他结构体系进行对比分析表明,只要结构合理布局、并结合诸如适当设置辅助墩、在悬吊部分吊索与斜拉桥索适当交叉等一些措施,自锚式斜拉-悬吊协作体系桥具有优良的力学性能,完全能胜任深海、软土地基的建设。
In view of the natural conditions such as soft soil foundation, strong typhoon and deep-water foundation in Dalian Bay navigation channel, based on the summary of the bridge characteristics of the anchorage-type suspension-suspension coordination system in the past, the self-anchored cable-stayed suspension coordination system bridge . Taking the main waterway bridge of Dalian Cross-sea Bridge whose main span is 800 m as the engineering background, the scheme design and structural features of the self-anchored cable-stayed suspension cooperative system are introduced in detail. The static and dynamic characteristics, construction steps, economic performance As well as the fatigue problems of the suspension slings in the operation phase and the wind resistance stability during the construction phase. The comparative analysis with other structural systems such as suspension bridges shows that as long as the structure is properly laid out, Auxiliary piers, proper cross between suspension slings and cable-stayed bridges, etc. The self-anchored cable-stayed suspension system has excellent mechanical properties and is fully capable of deep sea and soft ground construction.