Building a bridge is a complex undertaking requiring knowledge and expertise. Several variables, including engineering constraints, costs, and environmental impacts come into play when deciding which construction method to use and bridge type to build.
Incremental launching of bridges can save time, money, space and disruption while easing access and delivering a high quality finish.
The incremental launching method is particularly suited to the construction of continuous post-tensioned multi-span bridges. It involves casting 15-30m long sections of the bridge superstructure in a stationary formwork behind an abutment and pushing a completed section forward with jacks or friction launching system along the bridge axis. The sections are cast contiguously and then stressed together. The superstructure is launched over temporary sliding bearings on the piers. To keep the bending moment low in the superstructure during construction, a launching nose is attached to the front of the bridge deck.
High-strength steel, high-performance concrete, and fiber-reinforced polymer composite materials has resulted in structures that are, in many cases, easier to build, more durable, and more economical. Optimization of structural shapes, details, components, and construction procedures was considered to take full advantages of these materials and their properties.
Our key achievement in constructing of 47 meter span Bridge on Hiran Rivan on Jabalpur National Highway # 12.
Applications and benefits