Based on the construction of large diameter pile foundations at deep water riverbed without overburden for the Shengmi Bridge in Nanchang, the construction difficulties and construction control key points involved in the method for bored pile construction with floating gantry are described.

The buildup, action, and structural design of water-retrieving painting booth with movable gantry were elucidated, while the design characteristics, cost, and application of the painting booth were introduced as well.