Bangkok 's notoriously congested traffic has provided ITD with construction challenges rarely found around the world when constructing the elevated and underground mass transit systems.

Commencing commercial service in late 1999 over some of the busiest main thoroughfares in Bangkok, ITD constructed the 23 km Bangkok Mass Transit System built on a 12 m high elevated concrete superstructure founded on piles extending up to 50 m below grade to provide a dual track heavy passenger train network. With two routes and 25 stations, the system has a peak capacity of 50,000 passengers per hour. The elevated viaduct segments were precast at ITD's Wihan Daeng ISO 9002 certified concrete precast facility at a rate of 10,000 m3 per month, transported to site and lifted onto the cast in-situ concrete superstructure support columns. The train systems for this turnkey project were provided by Siemens and the whole project was managed by the Siemens ITD Consortium.

Further developing the Bangkok mass transit system, the Metropolitan Rapid Transit Authority was set up to administer the first underground system in Thailand . ITD is the leader of the ION Joint Venture that was awarded in 1997 the design and construction of the civil works for the northern section of the MRTA Initial System Project (Blue Line). These works include 10.5 route km of twin bored 5.7 m diameter tunnels lined with concrete segments, 9 underground stations, along with an 8 storey park and ride building. Earth pressure balance tunnel boring machines were used for the bored tunnels, located about 20 m below the surface of major roads. The stations were constructed using a “top down” construction method within a diaphragm wall box, six of which are located under major thoroughfares. The project will have a capacity of 40,000 passengers per hour.

In August 2003 ITD was awarded, with local joint venture partner Evergreen Construction Corporation, the contract to construct the Nankang Underground Station with 186,500 m2 of useable floor area providing interchange facilities between the Taiwan High Speed Rail and the National Rail system in Taipei , Taiwan . This project also includes the construction of six buildings ranging from two to fourteen storeys in height.

Experience