樟木箐安宁河钢桁梁支架法施工工艺研讨

Discussion on Construction Technology of Steel Truss Beam Support Method on Anning River of Zhangmuqing Country

钢桁梁桁架杆件具有较大的刚度和跨越能力,已在越来越多的铁路领域应用。樟木箐安宁河双线特大桥跨越安宁河,采用80 m等跨度钢桁梁,全桥在节点处加设支架用于调整预拱度,起吊高度为20 m左右,施工难度较大,对安装精细度要求较高。以樟木箐安宁河双线特大桥为例,介绍了钢桁梁支架法施工工艺及流程。

Steel truss members of steel truss beam have greater rigidity and spanning capacity,which have been applied more and more frequently in railway fields.Zhangmuqing Anning River Double-Track Great Bridge crosses Anning River adopts 80m equal span steel truss beam,and additional supports are set at the nodes of the whole bridge to adjust the pre-camber,with lifting height of about 20m.Therefore,the construction is difficult and higher installation precision is required.Taking Zhangmuqing Anning River Double-Track Great Bridge as an example,the construction technology and process of steel truss beam support method are introduced.