The cast-in-place moveable formwork of prestress box girder is suitable for the viaduct, and the large-span bridge approach of the bridges in the highway and railway. Owning to its large span capacity, strong structural stiffness, the moveable formwork, being economical and affordable,it can be especially used to the engineering condition, which has high piers and a large span, or a limited clearance under the bridge. However, it can not be normal working, due to the influence of other fabrics in the starting span of bridge or abutment. In this case, setting up the supports and formwork process are usually applied to deal with it. This paper mainly introduces the construction of tail span by using moveable formwork to develop continuous box girder at Damen Bridge in Wenzhou, including setting assistant supports, developing the ending span by moveable formwork, and concreting and demolishing of formwork.
box girders with tail span