现浇混凝土大直径管桩（FCC桩）在海口市滨江西路防治桥头跳车软基处理设计中的应用

Application of Cast-in-situ Concrete Large-diameter Pipe Pile(FCC Pile) in Design of Soft Foundation Treatment for Preventing Bump at Bridge Head of West Binjiang Road in Haikou City

在我国已建成的道路交通工程中,桥头跳车是道路交通中普遍存在的问题,桥头跳车产生的根本原因是桥梁与道路间的沉降差,采取经济合理、快速有效的软土处理技术,减少或避免桥梁与道路间的沉降差是解决桥头跳车问题的有效办法。现浇混凝土大直径管桩(FCC桩)技术具有刚性桩的特点,与桥梁刚性结构相一致,可以有效解决桥梁与路基交界处的沉降差,从而避免桥头跳车的不良影响,在海南软土地区具有较大的推广应用价值。通过海口市滨江西路个钱渡桥桥头软基处理设计的实践应用,分析了桥头跳车的成因,提出了现浇混凝土大直径管桩(FCC桩)在解决桥头跳车问题发挥的重要作用。

In the road traffic engineering built in China,the bump at bridge head is a common problem in road traffic.The fundamental cause of bump at bridge head is the settlement difference between bridge and road.It is an effective way to solve the problem of bump at bridge head by adopting the economical,reasonable,fast and effective soft soil treatment technology to reduce or avoid the settlement difference between bridge and road.The cast-in-situ concrete large-diameter pipe pile(FCC pile)technology has the characteristics of rigid pile,which is consistent with the rigid structure of bridge.It can effectively solve the settlement difference at the junction of bridge and roadbed so as to avoid the adverse impact of bump at bridge head.It has the great application value in the soft soil area of Hainan.Based on the practical application of the soft foundation treatment design at the head of Geqiandu Bridge in West Binjiang Road of Haikou City,this paper analyzes the causes of bump at the bridge head,and puts forward the important role of cast-in-situ concrete large-diameter pipe pile(FCC pile)in solving the problem of bump at bridge head.