【作者】 苏斌；

【导师】 廖海黎；

【作者基本信息】 西南交通大学 ， 建筑与土木， 2002， 硕士

【摘要】 本文对广西黎塘～钦州地方铁路的重点工程飞龙大桥深水基础的施工作了总结。其中，对深水基础的施工及浮吊的使用进行了探讨，根据水深确定桥墩基础的施工方法，对水深不超过四米的桥墩基础，采用填土筑岛的方法：对水深大于四米，河床有覆盖层，且能保证钢管桩具有足够的承载力的桥墩，采用钢管桩平台；对主河道上河床没有覆盖层，钢管桩无法插打的桥墩，采用浮式平台。在水上作业中，作者利用中-60浮箱等设备自行设计、拼制了40t浮吊，完成了水上运输、水上起重等作业，如钢管桩的运输、插打、水上施工平台的搭设、钻机吊车的水上转移、承台吊箱的起吊、钢管桩的拔除等作业。在全桥的施工过程中，40t浮吊起到了非常大的作用，解决了许多施工难题。在水中桥墩的施工过程中，每个关键步骤都需要浮吊作业，有了浮吊，无需缆索吊，就完成了施工，而且浮吊造价低、操作灵活、拼装简易、起重量大，在深水作业中，是一种值得推广和使用的好方法。更多还原

【Abstract】 The thesis makes a summary to the construction of deep-water foundations of Feilong Bridge which is major project of Guangxi Litang-Qinzhou Local Railway. In which,it gives inquiring of the construction of deep- water foundations and the usage of floating crane. The construction program of bridge pier foundation will be fixed according to the water depth. If the water depth is less than 4m,pier foundation will adopt the method of building island by earth filling;if the water depth is more than 4m and there is over burden at river bed,at the same time,it has sufficient bearing capacity to load steel pipe pile,the steel pipe pile platform will be adopted. If there is no over burden at the river bed,the steel pipe pile cannot be inserted,the floating platform will be adopted,during overwater construction,the author (using zhong-60 floating box,etc.) assembled 40t floating crane by his own design,in this way,the floating crane completed the work of overwater transporting and lifting,such as the transporting of steel pipe pile,inserting,the erecting of overwater construction platform,overwater moving of drill grid crane,lifting of lifting box of cushion cap,pulling out of steel pipe pile. The 40t floating crane played a very important role in the construction of the whole bridge and solved many difficult problems. During the construction of the water pile,every key step needs floating crane. Compared with cable crane,the floating crane has the characteristics of low cost,large lifting capacity,easy assembling and operating. It is a good method and can be spread and used in the deep-water construction.更多还原