CONSTRUCTION METHOD FOR FAST TRACK ERECTION OF SKEW STEEL TRUSS BRIDGE IN ALEP PACKAGE-2

Fast track construction requirements have pushed engineers to the new limits. The erection and launching of the superstructure of bridges have become the most critical part of the projects requiring skilled labour and specialized equipment. Every bridge or viaduct has its own individuality in terms of its function, structure or construction method. The construction method, though not very noticeable after the construction, has its own significance with respect to the cost of the bridge as it determines the time for completion of project and the design of the bridge. Some methods emphasize on construction time while the others provide a high degree of convenience to work independent of the surroundings like heavy traffic, live rail lines, deep valleys, rivers, etc. 
The methodology adopted for erection of the steel ROBs at chainage 67+600 in the Agra Lucknow Expressway (ALEP), Package 2, was dependent on time as well as the surroundings, in this case,the Delhi-Kolkata busy railway lines.Construction of bridges over railway lines is always a difficult task considering their importance and strict norms of the railway authority in India. In such scenario, constructing a steel bridge over one of the busiest railway lines, running the most important express-trains of the country, was a challenging task. The timely completion of this steel bridge was crucial to meet the deadlines of one of the most ambitious projects -The Agra-Lucknow expressway, recently completed in the country. This paper describes the detail methodology adopted for erection of the skew steel bridge over railway lines.