南浦大桥浦西大位移桥梁伸缩装置更换设计

浦西大位移桥梁伸缩装置是连接南浦大桥主桥与浦西引桥的伸缩装置,在多年来浦东、浦西不均匀沉降和超负荷的交通荷载等因素影响下,浦西大位移桥梁伸缩装置已发生严重损坏,急需更换。由于更换施工只能在白天不封交、夜间不断交的交通要求进行,通过选择适宜分段施工的单元式多向变位梳形板桥梁伸缩装置、合理改造槽口结构形式、采用有效的临时通行措施,确保了浦西大位移桥梁伸缩装置的顺利更换,同时保证了质量、缩短了工期,可为重要交通要道的大位移桥梁伸缩装置在不封闭交通条件下的更换提供参考。

Replacement Design of Expansion Devices for Large Displacement Bridge at Puxi of Nanpu Bridge

The expansion devices of large displacement bridge at Puxi are used to connect the main bridge of Nanpu Bridge and the approach bridge of Puxi.In many years,under the influence of differential settlement between Pudong and Puxi,and the overloaded traffic,the large displacement bridge expansion devices at Puxi have been seriously damaged and are urgently to replace.Due to the implementation of replacement construction only under the traffic requirements of not closing traffic during day and continuous traffic at night,the selection of suitable section construction of unit-type multidirectional deflection comb-plate bridge expansion device,the reasonable reconstruction of slot structure and the use of effective temporary traffic measures can ensure the smooth replacement of large-displacement bridge expansion devices at Puxi,and at the same time guarantee the quality and shorten the construction period,which can be referred for the replacement of large displacement bridge expansion devices at the important traffic roads under the condition of not closing traffic.