中承式钢管混凝土拱桥吊杆更换施工技术

Suspender Replacement Technology of Half-through Concrete-filled Steel Tube Arch Bridge

以柳州市文惠大桥的吊杆更换工作为例,确定了吊杆更换的施工流程及各步骤控制措施。采用预抬高和边割除旧吊杆边抬高方案使得割除旧吊杆后,下沉很少。同一根吊杆上下游同时兜吊,减少了二次调索工程量。实践证明,桥面各吊点标高满足要求,桥跨受力性能好,吊杆受力均匀,达到设计要求。

Based on suspender replacement of Wenhui Bridge in Liuzhou,construction process and control measures are made.Pre-raising and raising when resetting the suspenders schemes ensure little settlement.Secondly cable adjustment is reduced by hanging suspenders upstream and downstream at the same time.It proves that evaluations of hanging points at bridge deck reach requirements,and bearing capacity of bridge span and suspenders can be ensured.