Construction Of Deep-Water Foundations Of Feilong Bridge And Usage Of Floating Crane 40T

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.