GPS Construction Survey of the Piles, Towers and Anchorages of Humen Bridge

Humen bridge has a total length of 15.6 km and a main bridge length 4.58 km. In this paper, the construction surveyofHumen bridge conducted byGPS positioningtechnique is introduced. Practice proves that the layout precisions of the cable support towers and anchorages of the suspension bridge, the main piers of the continuous rigid frame bridge, and the piers of the west approach bridge are fulfilled to the bridge construction specifications. It also shows that GPS datum transformation by using”construction ellipsoid”in coastal plains can obtain satisfactory applicable results for bridge construction survey.