High quality Cable stay concrete bridge underslung Form Traveler system for cast in situ project steel shutters

Underslung Form Traveller is a cost – effective and reliable solution! Both the overhead and the underslung FT are designed for free cantilever construction of pre-stressed girder and cable – stayed concrete bridges. And underslung FT designed for a segment length with 5 m to 9m.

The superstructure of cable-stayed bridge consists of three parts: main girder, tower and stay cable. Various materials and forms can be used for each part of the structure, so there are many construction methods. The construction method of the main girder of cable-stayed bridge is closely related to the structural characteristics of the bridge, such as the structural system, cable type, cable distance and the cross-section form of the main girder, in addition to the factors such as the construction technical equipment and site environmental conditions. Generally, the main girder of long-span cable-stayed bridge is constructed by cantilever casting or cantilever assembly. For small and medium span cable-stayed bridges, support method, jacking method or horizontal rotation method can be used according to the topographical, hydrological and meteorological conditions of the bridge site and the characteristics of the structure itself. It should be emphasized that the internal force of different construction methods is different in each construction stage, sometimes the structural design is often controlled by the internal force of construction, so the construction method, internal force and deformation of construction must be considered in the structural design. The selection of construction methods should meet the design requirements. New design concept can promote the progress of construction technology, while advanced and reasonable construction technology and experience can also promote the development of design theory.

The construction of suspension bridge mainly includes the fabrication and installation of anchorage, bridge tower, main cable, sling and stiffening beam. The anchorage structure is divided into three types: gravity type, tunnel type and rock type, and the former two types are mainly. Rock anchorage type is generally combined with tunnel type. The tower of long-span suspension bridge is made of steel or concrete. Small span suspension bridges are built with masonry materials. The main cables of suspension bridges are usually erected by air spinning or preformed parallel wire strands. Generally speaking, the erection of stiffening beams adopts prefabricated and assembled construction.