The efficiency of Lean at work in the Nagpur Metro
RAILWAYS & METRO RAIL

The efficiency of Lean at work in the Nagpur Metro

Nagpur Metro Phase 1 consisted of two corridors, North-South and East-West, with a total length of 41.7 km. Of this, 17.087 km (41 per cent of the viaduct) was awarded to Afcons in the Reach 2 (North-South corridor) and Reach 3 (East-West corridor) stretches. Afcons executed the Reach 2 package in the North-South corridor, which consists of a 5-km double-decker structure and 1.7-km metro viaduct structure that starts from Automotive Square on Kamptee Road and ends at Sitabuldi.

The double-decker flyover structure consists of two decks: flyover level and metro level. The decks are constructed with precast segments. The flyover level consists of two segments: spine and wings. The team adopted Value Stream Mapping (VSM) to improve the cycle time by ~50 per cent, from 28 days to 14 days. Some key interventions were:

  • Improvement in sequence of construction operations allowing for simultaneously launching wing segments and launcher (after erection of three cantilever arms)
  • Analysis of idle time to optimise use of trailers for transportation of both segments and wings
  • Simultaneous operations for wings alignment, shutter fixing and rebar fixing
  • Minimising time at site operations through use of boom placer instead of stationary pump and higher grade of concrete
  • Use of manlift for stressing to decouple working site and ground traffic.

Nagpur Metro Phase 1 consisted of two corridors, North-South and East-West, with a total length of 41.7 km. Of this, 17.087 km (41 per cent of the viaduct) was awarded to Afcons in the Reach 2 (North-South corridor) and Reach 3 (East-West corridor) stretches. Afcons executed the Reach 2 package in the North-South corridor, which consists of a 5-km double-decker structure and 1.7-km metro viaduct structure that starts from Automotive Square on Kamptee Road and ends at Sitabuldi. The double-decker flyover structure consists of two decks: flyover level and metro level. The decks are constructed with precast segments. The flyover level consists of two segments: spine and wings. The team adopted Value Stream Mapping (VSM) to improve the cycle time by ~50 per cent, from 28 days to 14 days. Some key interventions were: Improvement in sequence of construction operations allowing for simultaneously launching wing segments and launcher (after erection of three cantilever arms)Analysis of idle time to optimise use of trailers for transportation of both segments and wingsSimultaneous operations for wings alignment, shutter fixing and rebar fixingMinimising time at site operations through use of boom placer instead of stationary pump and higher grade of concreteUse of manlift for stressing to decouple working site and ground traffic.

Next Story
Infrastructure Transport

Indore Metro: Final Safety Inspection Scheduled

Indore is preparing for the launch of its metro services, with inspections at five metro stations scheduled for March 24 and 25. The metro’s commercial operations are anticipated to commence by the end of March. The Commissioner of Metro Railway Safety (CMRS), Janak Kumar Garg, will visit Indore on March 24 for a two-day inspection of the metro line, including five stations and the 5.9km Super Priority Corridor. During the inspection, the CMRS and his team will ride the metro coach to check its speed, set at 80km per hour, and review various safety aspects. They will also use a trolley on t..

Next Story
Infrastructure Transport

Early Metro Services Announced for Bidadi Half Marathon

The Bangalore Metro Rail Corporation Limited (BMRCL) has announced early metro services on March 23 to accommodate participants of the Bidadi Half Marathon. Metro services will start at 5 am, two hours earlier than usual, from all four terminal stations. Additionally, services from Nadaprabhu Kempegowda Station, Majestic, towards Challaghatta, will begin as early as 4 am to assist marathon runners. BMRCL has urged commuters to take note of the altered schedule and plan their travel accordingly. The BMRCL recently also introduced extended metro services on the Purple Line, with evening opera..

Next Story
Infrastructure Urban

Foundation Stone Laid for Phase 2 of Mega Water Project

Gautam Deb, Mayor of Siliguri, laid the foundation stone for the second phase of the mega water project in Fulbari. The event was attended by Ranjan Sarkar, Deputy Mayor, Pratul Chakraborty, Chairman of the Siliguri Municipal Corporation (SMC), and other officials. The project, valued at approximately Rs 511 crore under the AMRUT 2 scheme, will be executed in three phases. The first phase is nearly complete. The second phase involves the construction of a pond in Fulbari to store water, which will be sourced from Gajoldoba, purified, and distributed to wards via a pipeline. This phase alone w..

Advertisement

Advertisement

Subscribe to Our Newsletter

Get daily newsletters around different themes from Construction world.

STAY CONNECTED

Advertisement

Advertisement

Advertisement

Advertisement

Talk to us?