|Dam and Tunnels|
Expertise in the construction of earthfill, rockfill and concrete dams, matched with tunnel construction experience for irrigation, potable water transmission, power generation, highways and railways, provides ITD with the knowledge and resources to complete the complex water supply and hydro-electricity generation projects necessary to meet Thailand's and the neighbouring region's ever expanding needs economically and to schedule.
The complex Khao Laem Dam multi-purpose hydro-electric project in Kanchanaburi in the west of Thailand exemplifies ITD's dam construction capabilities. The 1,000 m long, 127 m high concrete-faced rock-fill dam rests on a 50 m deep concrete diaphragm cutoff wall, which prevents seepage under the dam. During construction the existing river was diverted through a 7 m diameter horseshoe shaped tunnel. Ancillary structures include an inlet tower and penstocks which supply water to the 300 MW
hydro-electric generating station.
Across Thailand, ITD has completed 7 major dams and more than 30 km of large diameter tunnels during the past 30 years. This expertise, covering the planning to implementing phases, is now being exported to India, Laos, Myanmar and the Philippines on build-operate-transfer hydro-electric and irrigation projects.
Khao Laem Multi-purpose Dam and Tunnel (February 1980 - February 1985)
Construction of a 1,000 m long, 127 m high concrete faced earthfill dam, power house and a 7 m diameter horseshoe division tunnel 420 m long. Total embankment fill of about 8.2 million m3, 1.5 million m3 of rock excavation and 400,000 m3 of concrete work.
Pattani Multipurpose Dam (October 1977 - June 1980)
Construction of a dam 80 m high, 422 m long with 2.9 million m3 of earth and rock fill, twin water diversion tunnels each 7 m in diameter and 394 m and 437 m long and steel lined power conduit 6 m in diameter and 249 m long. The 3 generators in the partially underground powerhouse generating 24 MW per unit.
Experince• Civil Work of the Pipeline Tunnel at Mae Moh Units 12&13 Water Supply Project (June 1996 - March 1998)
Construction of a 3 m diameter horse-shoe tunnel 2.7 km long to carry a water pipeline.
• Bang Pakong Diversion Dam (October 1996 - September 1999)
Construction of a diversion dam on the Bang Pakong river with a length of 166 m and height of 10 m
• Klong Sip Kao - Kaeng Khoi Railway Tunnel (April 1993 - February 1995)
Construction of a tunnel of height 6.5 m, width 7.5 m and 1,197 m in length.
• Nam Mae Sa - Nga Hydro- electric Dam and Tunnel (August 1986 - December 1987)
Construction of a dam, power house, headrace conduit and appurtenant works requiring 440,000 m 3 of earth fill, 1,020,000 m 3 of common excavation, 170,000 m 3 of rock excavation and 32,000 m 3 of concrete work.
• Nam Mae Mao Hydro-electric Dam (September 1984 - June 1987)
A 200 m long and 60 m high concrete dam with a hores-shoe shaped concrete lined tunnel 5 m diameter and 100 m long, excavated through quartzite rock.
• Ubol Ratana Dam - Flood Protection (October 1984 - October 1986)
Raising of the rockfill Ubol Ratana Dam, the spillway and the spillway basin.
• Huai Saphan Hin Hydro-electric Dam (August 1983 - May 1986)
An earthfill dam 1,500 m long and 25 m high with a 2.9 m diameter 750 m long horse-shoe shaped tunnel, intake channel and intake structure, a power station, office and other facilities.
• Kho Laem Multipurpose Dam and Tunnel (February 1980 - February 1985)
Construction of a 1,000 m long, 127 m high concrete faced earthfill dam, power house and a 7 m diameter horseshoe diversion tunnel 420 m long. Total embankment fill of about 8.2 million m 3 , 1.5 million m 3 of rock excavation and 400,000 m 3 of concrete work.
• Krasiew Dam (April 1977 - August 1979)
Construction of an earth dam 4,000 m long and 30 m high with a total embankment fill of 5.3 million m 3 and 467,000 m 3 of rock protection.
• Pattani Multipurpose Dam (October 1977 - July 1981)
Construction of a dam 80 m high, 422 m long, with 2.9 million m 3 of earth and rock fill, twin water diversion tunnels each 7 m in diameter of 394 m and 437 m long, and a steel lined power conduit 6 m diameter and 249 m long. The 3 generators in the partially underground powerhouse provide 24 MW per unit.