西堠门大流速深水区钢箱梁运输船定位方案研究

Scheme for Positioning of Steel Box Girder Delivery Barge in Swift Current and Deep Water Area in Xihoumen Channel

西堠门水道水深、流急、海底无覆盖层,水上施工船投锚固定难度大。分析西堠门大桥钢箱梁的吊装工期要求和吊装规程要求,提出利用大吨位混凝土蛙锚和浮动平台构筑锚碇门桥、实施钢箱梁运输船定位的方案,并对箱梁运输船的水阻力、锚链力进行了初步计算,对工程实施具有指导意义。

It is difficult to anchor a barge for waterborne construction in Xihoumen channel because the water in the channel is deep, water current is swift and there is no overburden on the sea bed. On the basis of analysis of the requirements for working time schedule and regulations of lifting and erection of steel box girders of Xihoumen Bridge, this paper proposes a construction scheme for positioning delivery barges of the steel box girders in the channel by using a mooring portal bridge to be built with large tonnage frog type concrete anchors and floating platform, and also makes calculation of water resistance of the barges and mooring chain forces of the anchors. The construction scheme in the paper and the calculation related to are of practical guidance to the the implementation of the construction of the Bridge.