Skip to main content

Bangkok plans to spend US$3.5bn to build mega underground tunnels

Thailand could emulate Malaysia's twin smart-tunnel project through its own proposed Thailand Underground Tunnelling Group (TUTG) project, with an estimated investment of US$3.5 billion. Under the TUTG propsal, two large tunnels are to be constructed in Bangkok's underground to channel the city's rainwater surplus during heavy monsoons to refill its underground reserves whose water levels are now decreasing. When there is no major flood in Bangkok, the tunnels would be transformed into an underground roadwa
May 24, 2013 Read time: 2 mins
Thailand could emulate Malaysia's twin smart-tunnel project through its own proposed Thailand Underground Tunnelling Group (TUTG) project, with an estimated investment of US$3.5 billion.

Under the TUTG proposal, two large tunnels are to be constructed in Bangkok's underground to channel the city's rainwater surplus during heavy monsoons to refill its underground reserves whose water levels are now decreasing. When there is no major flood in Bangkok, the tunnels would be transformed into an underground roadway to ease the city traffic.

Malaysia’s twin-smart tunnel project in the country’s capital, Kuala Lumpur, known as the 5333 Stormwater Management and Road Tunnel (SMART) and the first tunnel of its kind in the world, is an innovative solution to Kuala Lumpur’s long-term traffic and stormwater management problems. The dual-purpose tunnel is diverting floodwaters away from the confluence of the two major rivers running through the city centre, while its central section is doubling up as a two-deck motorway to relieve traffic congestion at the main southern gateway into the city centre.

SMART was originally conceived as a flood relief tunnel to divert the 1 in 100 year flood away from the city centre. Then it was considered that the 11.8m internal diameter tunnel could be utilised in periods of low rainfall as a highway tunnel to alleviate Kuala Lumpur’s congested highway infrastructure. 2579 Mott MacDonald was approached by the MMC Engineering Group-Gamuda joint venture to carry out the feasibility study for this innovative dual purpose tunnel and then provide detailed design services to take the project from concept through to construction, working in association with SSP Consultants. Under the supervision of Mott MacDonald/SSP on behalf of the joint venture, the highway section and bypass tunnel were both completed and operational by May 2007.

The overall US$500 million plus scheme comprised 9.5km of tunnel with the central 3km incorporating a double deck motorway. Major components include an upstream intake structure, holding pond and storage reservoir, diversion tunnel, twin box culvert and ingress/egress connectors to the motorway tunnel. Ventilation of the road tunnel required construction of four 15m-high shaft structures.

For more information on companies in this article

Related Content

  • Mott MacDonald’s passage to India
    June 14, 2012
    Mott MacDonald has been appointed design consultant for the proposed Raipur–Bilaspur national highway 200 in India. Part of the National Highways Development Programme Phase IV, established by the National Highways Authority of India (NHAI), the new road will connect Raipur in Chhatttisgarh to Chandikohole in Orissa, passing through areas including Bilaspur, Raigarh and Jarsuguda. Costing US$244.2million, the 127km long road is primarily made up of four lanes, with 34km of the highway comprising six lanes
  • Stonehenge tunnel preferred bidder announced
    May 27, 2022
    The preferred bidder has been announced for the UK’s Stonehenge tunnel.
  • Tunnels eliminate bottlenecks
    February 10, 2012
    Some of the bottlenecks on the multi-lane Mittlere Ring, Munich, Germany, one of the main arterial roads circling the city centre have been eliminated by the addition of new tunnels. The Luise-Kiesselbach Square, the last section of this road improvement effort, is an important traffic hub south-west of the city where motorways A96 from Lindau and A5 from Garmisch meet, causing long delays in daily rush-hour traffic, writes Patrick Smith.
  • Mott reasons to be cheerful PPP
    May 1, 2012
    Mott MacDonald has been appointed lenders’ technical advisor for a US$133.7million highway project in Gent, Belgium. The project is being funded through a public private partnership (PPP) by Via R4 Gent¹, a special purpose vehicle established to carry out the design, construction, financing and maintenance of the highway.