Bridge foundation is the key point in the whole process of bridge construction and there are corresponding difficulties.This paper takes Lanjiang Large Bridge as an example to explain the advantages of construction technology of double-wall steel cofferdam in deep water thin cover bed.With circular cofferdam structure as the representative,the design optimization and construction of steel cofferdam are discussed under complex conditions such as cofferdam de-sign,cofferdam assembly,platform construction and sinking.The results show that the quality of double-wall steel cof-ferdam can be better controlled by processing and on-site assembly,and the accuracy of double-wall steel cofferdam construction can be better controlled by floating and sinking construction technology.The steel cofferdam height and sinking technology can avoid the problem that the steel cofferdam has too much force in the sinking process.The key construction technology implemented reduces the waste of materials,reduces the cost,effectively avoids the location de-viation of cofferdam,avoids the pollution of river water,and meets the requirements of green construction.
维普
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