Work on Metro begins in multiple places
Hyderabad: With the construction of the Hyderabad Metro Rail (HMR) project work beginning on railway over-bridge crossing the road junctions, the traffic of Hyderabad is bracing up in anticipation of some tough commuting days ahead. Work at the crossroads of Uppal and the junction of Habsiguda have already been progressing at a decent rate.As per the managing director of HMR, an attempt to work on five to eight road junctions at crossovers across the three metro corridors in a single go would be undertaken after the supervising engineers of HMR and concessionaire L&T Metro Rail Hyderabad (L&TMRH) gain expertise from the two spans of Uppal crossroad and the junction of Habsiguda.
Longer obligatory spans involving ‘in-situ’ construction (commonly known as ‘on the spot construction’) is required for twenty-eight junctions of the eighty junctions where, the elevated track up above the railway over-bridge will be constructed across. The herculean task involves building eighty flyovers over and across busy traffic junctions without causing any disruption to the movement of traffic in the already saturated junctions.
Since, a period of approximately four to five months would be required in order to bridge the major junctions employing the methods of ‘in-situ’ construction, several junctions will be attempted simultaneously to save time.
CHALLENGING TASK
In order to generate better traffic management solutions for the intersections the HMR engaged consultants. According to a study conducted by the consultants, the projection on bigger obligatory spans for various junctions with regards to the future traffic flows has made the task even more challenging.
The decision of bridging junctions bearing a span length up to 34 meters along with segmental construction by the same launching girders, which are also a part of the railway over-bridge; was made after numerous rounds of technical discussions between consultants and the engineers of metro rail.
TEMPORARY SUPPORTS
The elevated concreting deck would receive temporary support from the method of ‘spot bridge construction’. Moreover, after the steel reinforcement are tied, the concreting would take place in three stages. After the railway over-bridge is cured for fourteen days, it would be safely secured by pre-stressing the inserted high strength steel strands. The temporary supports will then be completely removed.
A gap of fifty feet would be left between the temporary supports to permit the flow of traffic, effectively there would be three lanes on each side.
The 28 junctions with longer obligatory spans which involves ‘in situ’ construction method are:
Corridor-I – L.B. Nagar to Miyapur:
Nizampet Junction (141 ft), JNTU Junction (148 ft), Godrej Y Junction (190 ft), SR Nagar Junction (148 ft), Punjagutta Junction (190 ft), KCP Junction (121 ft), Khairatabad Junction (190 ft), Lakdikapul Junction (148 ft), Nampally Junction (131 ft), Mujam Jahi market Junction (190 ft), Mussraam Bagh Junction (131 ft) and Kothapet Junction (121 ft).
Corridor-II – JBS to Falaknuma:
Parade Grounds Junction (180 ft), Musheerabad Junction (121 ft), Narayanguda Junction (121 ft), Sultan Bazar Junction (144 ft), Kotla-E-Alijah X Road Junction (121 ft), Bibi Bazar Chowrastha Junction (121 ft) and Shamshergunj Junction (121 ft).
Corridor-III – Nagole to Shilparamam:
Uppal Junction (148 ft), Habsiguda Junction (148 ft), Alugaddabavi Junction (131 ft), Sangeet Junction (138 ft), Paradise Junction (138 ft), Dharam Karan Junction (148 ft), Yusufguda Basti Junction (148 ft), Madhapur PS Junction (148 ft) and Hi-tec City Junction (151 ft).
