India’s East Coast Railway has used microtunnelling to clear a water-logged station in its network.
The municipal drain connected to the Bhubaneswar Railway Station is ill-equipped to cope with heavy rains in the Ashok Nagar area, with overflows resulting in yard floods at the station, impacting on not only the railway signalling system but also train services on the Howrah-Chennai Main Line.
Initially, plans were designed to build a bridge; however, this proved infeasible due to difficulties in execution, including the disruption it would cause at Bhubaneswar Station and to traffic on the rail line.
After consideration, microtunnelling was selected as the best method to minimise disruptions to train traffic and commuters.
In the first use of microtunnelling for the East Coast Railway System, a 104 m drainage tunnel has been installed using remotely controlled guided pipe jacking to push 1.8 m diameter concrete pipe into place behind the machine.
As microtunnelling allows support of the excavation face using mechanical and fluid pressure to counter balance the groundwater and earth pressure, it addressed the environmental conditions present in the project and was chosen over traditional open-shield pipe jacking.
The drainage has been installed at the south end of the station’s yard and will supplement the municipal drain’s capacity, helping discharge water from the area and eliminating overflow and flooding issues during heavy rain.
Construction took place earlier this year and was completed in 30 days.
For more information visit the East Coast Railway website.
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