沪通长江大桥主航道桥沉井锚碇系统设计

发布时间：2018-05-07 03:19

本文选题：铁路公路两用桥 + 斜拉桥　；参考：《桥梁建设》2017年03期

【摘要】：沪通长江大桥主航道桥为主跨1 092m的双塔钢桁梁斜拉桥,6个桥墩均采用沉井基础,沉井上部为钢筋混凝土结构,下部为钢结构。桥墩处水深10~30 m,双向潮流,最大流速达3.15m/s;桥塔墩、边墩与辅助墩钢沉井的最大锚泊力分别达9 600kN和1 560kN。桥塔墩沉井采用"大直径钢桩+混凝土重力锚"锚碇系统,采用8(10)根直径3.5m钢桩和8个8 800kN混凝土重力锚,利用直径110mm钢丝绳与沉井顶面16(18)台350t连续千斤顶相连,通过连续千斤顶多向快速定位收紧系统,同步对沉井的平面位置及扭角进行快速调整;边墩、辅助墩钢沉井采用"沉井内部大直径钢桩定位"锚碇系统,每墩仅用4根预先插打且相互独立的钢桩进行沉井定位。
[Abstract]:The main channel bridge of Hutong Yangtze River Bridge is a double-tower steel truss girder cable-stayed bridge with a main span of 109.2 m. The six piers are based on caisson foundation, the upper part of the caisson is reinforced concrete structure, and the lower part is steel structure. The water depth at the pier is 1030m, the bidirectional tidal current is 3. 15m / s, and the maximum anchoring force of steel caisson of tower pier, side pier and auxiliary pier is 9 600kN and 1 560kNrespectively. The bridge tower pier caisson adopts the Anchorage system of "large diameter steel pile concrete gravity anchor", adopts 810 steel pile with 3. 5m diameter and 8 800kN concrete gravity anchor. The diameter 110mm wire rope is connected with the 350t continuous Jack on the top surface of the caisson. The plane position and torsion angle of the caisson are adjusted quickly by means of the multi-direction fast positioning and tightening system of continuous Jack, and the Anchorage system of "large diameter steel pile positioning inside the caisson" is used in the side pier and auxiliary pier steel caisson. Each pier is located by only 4 pre-inserted and independent steel piles.
【作者单位】：中铁大桥局集团有限公司;
【基金】：中国铁路总公司科技研究开发计划项目(2014G004-B)~~
【分类号】：U448.27

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