跨江大桥主墩防船撞设施设计——以荆州长江大桥北岸主桥为例

Design for Ship Collision Prevention Facility for Cross-river Bridge Main Pier:Taking North Bank Main Bridge of Jingzhou Yangtze River Bridge for Example

为确保现有防撞性能不足的跨航道大桥在交通环境中的运营安全,以荆州长江大桥北岸主桥防撞工程为研究背景,分析了大桥的结构形式和桥墩的防撞性能。结合防撞设施的设计原则,对防撞设施的类型、材料和结构进行了比较和选择。根据防撞设施的使用寿命、施工难度、耐久性、综合成本等因素,选择性能优良的防撞设施。有效减少了船舶碰撞对桥墩的损伤。防撞设施损坏后易于修复,在水道中占用的空间较小,制造和维护便利,结构耐腐蚀性强,此外通过有限元软件进行船舶撞击模拟,模拟结果显示安装该类型防船撞设施后撞击力可消减36%左右,能有效延长撞击时间,消减撞击力,充分发挥防船撞设施的耗能防护作用,可为今后类似项目提供参考。

To ensure the operation safety of existing cross channel bridges with insufficient anti-collision performance in traffic environments,it is necessary to design and install ship collision prevention facilities for existing cross channel bridges.Taking the anti-collision project of main bridge on the north bank of Jingzhou Yangtze River Bridge as the study background,the structural form of bridge and the anti-collision performance of bridge piers were analyzed.Combining with the design principles of anti-collision facilities,the types,materials,and structures of anti-collision facilities were compared and selected.Based on the factors(e.g.,service life,construction difficulty,durability,and comprehensive cost)of anti-collision facilities,the excellent anti-collision performance was selected.The damage to bridge piers caused by ship collision is reduced effectively.The anti-collision facilities were easy to be repaired after damage,and occupy less space in the waterway.With strong corrosion resistance of the structure,it is easy to be manufactured and maintained.In addition,the finite element software was used to simulate ship collision.The simulation result shows that the installation of the type of ship collision prevention facilities can reduce the impact force by about 36%,effectively extending the impact time,reducing the impact force,and fully exerting the energy consumption protection effect of the ship collision prevention facilities.It can provide reference for similar projects in the future.