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In recent years, with the vigorous development of China 's highway construction , extra large bridge across the river, the river , the Gulf , the Strait continue to emerge , the construction of a large number of deep-water bridge must put forward higher requirements for the construction of the bridge foundation . Deepwater bridge pile foundation waterproofing structures including steel sheet pile cofferdam, cofferdam, Steel Box Cofferdam Steel Boxed as a bridge pile foundation construction waterproof cofferdam has a short construction period , without Shen into the riverbed material with less economic rationality has been widely used in the deep-water bridge pile foundation construction . In this paper, Ankang to Hapcheon sector highway Ziyang , the Han River Bridge pile foundation of bridge steel cofferdam construction , stress control and monitoring data to collate its summary of the construction process and the construction process of the Steel Boxed got the following results: 1 . impact the cofferdam structure factors . The hydrological and geological conditions of the construction site , as well as bridge the geographical , meteorological data and so on . And combined with the specific characteristics of the project and the required duration , should also consider the construction site of the machinery and equipment , select and determine the appropriate cofferdam structure . Steel Box Cofferdam construction process including site assembly and overall lifting of Steel Boxed Steel Boxed sub-section decentralization of both content decentralization and the whole block . The construction technology selection , site conditions , construction equipment , resource requirements and project risk factors need to be taken into account . Steel wire strain of steel hanging box assembly , decentralization of the back cover of concrete pouring process monitoring and analysis of steel suspending cofferdam stress changes are in various stage of construction , to determine the Steel Box Cofferdam most unfavorable deformation , and further to provide a theoretical and practical basis for the design and Construction of steel box Cofferdam .
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