怒江特大桥缆索人行施工便桥设计与施工技术

Design and Construction Technology of Wire Rope Pedestrian Temporary Bridge for Nujiang River Bridge

结合云南省施甸至勐简高速公路怒江特大桥施工现场河谷较深、水流湍急、河床孤石林立、山体陡峭、不具备修建钢便桥条件的实际情况。经方案比选采用缆索人行施工便桥作为联系大桥两岸的交通便桥,并在便桥上架设双线混凝土泵管,保证江对岸的混凝土供应及其他材料、设备运输及人员通行的实践经验。论文具体阐述了恶劣施工条件下山区跨江施工便桥方案的选取原则,详细介绍了缆索人行施工便桥的设计思路及施工要点。

Combining to practical experience of Nujiang River bridge on the Shidian to Mengjian highway in Yunnan Province,the construction site is deep river valley,rapid water flow,the river bed is bristling with solitary stones,steep mountain,and does not have the actual conditions for the construction of steel convenient bridge.Through the scheme comparison,the wire rope pedestrian construction bridge across the river is chosen as the traffic bridge connecting the two sides of the bridge,and on the auxiliary bridge erecting double concrete pump pipe,ensure the supply of concrete and other materials,equipment transport and personnel on the other side of the river.The selection principle of cross-river temporary bridge construction scheme in down-hill area under harsh construction conditions is elaborated in detail,and the design idea and construction key points of the cable pedestrian bridge are introduced in this paper.