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Construction Techniques for Setting and Driving Composite Pile Steel Pipes over Sea
Pages: 112-117
Year: Issue:  2
Journal: Bridge Construction

Keyword:  continuous girder bridgepile foundationcomposite pile steel pipeintegral guide framepositioningsetting and drivingbridge construction;
Abstract: The non-navigable span bridge of the Hong Kong-Zhuhai-Macao Bridge over the shallow water area is a 85-m span continuous composite girder bridge that is totally 5 440mlong and has 64spans.For each pier of the bridge,6composite pile steel pipes are provided and there are altogether 372steel pipes for the whole bridge.The diameters of the steel pipes in the areas of the low piers and high piers are respectively 2.0mand 2.2mand in addition to the length of the driving section,the total length of a steel pipe is greater than 60m.To meet the precision requirement for construction of the steel pipes over the surging sea,it was determined through comparison that the integral guide frame method was to be used to set and drive the steel pipes. Firstly,the guide frame was transported to the pier site and was initially positioned.The frame was positioned for the second time,using the adjusting system of the frame and at this time,4 positioning piles were set and driven by the APE400Bhydraulic pile hammer.Then the guide frame was fixed on the positioning piles,was positioned for the third time,using the fine adjusting device of the frame.After the guide frame was positioned,the steel pipes were set and driven to the designed elevation.In the construction,the plane locations and inclination of the steel pipes were ensured by the techniques of the hydraulic system,guide devices,RTK positioning survey and the three times of positioning of the guide frame and finally the construction precision of setting and driving the steel pipes satisfactorily met the technical specification of the project.
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