Terre Armée in India used the in-house technical know-how to custom-design the requisite cross-sections for this project. Based on the design, the moulds were customized to meet the design specifications.
The barrel length of the underpass is 26.5m and the internal dimension of the underpass is 6m wide x 3.5m high. There are 3 parallel railway tracks and Terre Armée in India proposed part construction, in which one track always remained live for handling of plant logistics. This is indispensable for the plant operations.
The pre-casting of box segments was completed in the designated casting yard close to the installation site and was installed at the desired location by cut ‘n’ cover method. Lifting System was adopted with a combination of Fabricated Spreader Beam and H T Freyssibars was extremely effective while handling pre-cast segments weighing 54.50 MT (including weight of lifting system). Installation of seven (7) units in the first phase was completed in 8 Hrs. Installation of ten (10) units in the second phase took 16 hrs even after hindrances due to constricted approach of crane.
The TechBox® technology has been proved to be far superior to the conventional in-situ Underpasses. It reduced the shutdown period of rail tracks to a great extent.