CASE HISTORY OF MRT STATION CONSTRUCTED WITH MINED TUNNELS IN MUMBAI METRO LINE 3
2 STUs (Structural) / 2 PDUs for PEs and CEngs / 2 TUCSS - Approved and Confirmed
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India Mumbai Metro Line 3 (MML-3) is a 33.5 KMs long underground corridor running along Colaba-Bandra-SEEPZ of Mumbai. Length of the corridor is marked with 27 key stations out of which 26 will be underground and 1 at grade.
One Smart Engineering Pte Lte has been engaged by L&T – STEC JV as Lead Design Checker (LDC) for the underground package of UG07 which consists of 3 stations, associated bored tunnels, cross passages, shafts and ramps. Marol Naka Station is one of the stations of the latest fully underground metroi line 2 in Mumbai which has been designed with one of the most extraordinary scheme where the completed bored tunnels will be enlarged for platform with mining method and multiple mined tunnels will be constructed to connect the platforms to the main station box in the middle which is constructed by strutted excavation method. This scheme has been developed to overcome the congestion of space at the designated station location, which is uncrossing an existing metro line 1 on elevated structure. The ground condition here is challenging as it has an under-drainage layer that bring high pressure water crossing the station. This presentation will discuss the challenges in designing the station with multiple mined tunnels and how these challenges can be overcome. This presentation will also show the site conditions during various stages of construction and the comparison of actual instructmentation readings with the initial prediction of ground movement.
ABOUT THE SPEAKER
Er David Ng is a Professional Engineer (Civil) and Specialist Professional Engineer (Geotechnical) in Singapore. He has been involved in publication of more than 70 technical papers in field of geotechnical and environmental engineering. He has more than 20 years of experience in management, planning, design and construction of major infrastructure and transportation projects in Singapore, Malaysia and India. He has worked in Land Transport Authority before and is now Co-Founder of One Smart Engineering Pte Ltd which has design offices in Singapore and Malaysia.
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