Thai river crossing challenge for Terratec 5 Feb 2014
Terratec News Release
- Terratec announces delivery of another microtunnelling system in Thailand for challenging installation of water transmission pipelines under the 380m-wide Bang Pakong River.
- The Australia-based TBM manufacturer is selected by the construction JV Ch. Karnchang PCL/Krung Thon Engineers Ltd (KTE) working on behalf of project owner Royal Irrigation Department of Thailand. The microtunnelling machine (MTBM) that will be used for the project was manufactured at Terratec's new fabrication plant in Thailand, a facility that was built on account of the company's growing sales in the country.
Pipe thrusting for 380m river crossing
- After just 23 days in the ground a 1.8m diameter Terratec slurry microtunnelling machine (MTBM) has completed the crossing of the Bang Pakong River in Thailand.
- The project, developed by a Joint Venture of Ch.Karnchang PCL and Krung Thon Engineers Co. Ltd. (KTE), is the first MTBM pipejacking project accomplished by the owner: the Royal Irrigation Department of Thailand (RID).
- Geology consisted of a combination of very stiff clay with high underground water level and sand spots. The project was completed smoothly by maintaining a very low jacking force (5,000kN) - less than half installed capacity (11,000kN). This was achieved thanks to the high performance of the lubrication system and the establishment of two strategically placed intermediate jacking stations to minimize pipe friction.
- The site worked around-the-clock in two 12-hour shifts, and in total 150 pipes of 2.5m length were installed.
Thailand crossing complete 9 July 2014
Terratec News Release
- Pipe jacking works under the Bang PaKong River pose technical challenges; at 380m across the river is very wide, and uneven depths will challenge construction. The geology of soft clay has a low shear and high resistance nature and collapses easily. Water also accumulates around the tidal flats, constantly permeating the soil, making the clay even softer.
- For the crossing KTE acquires from Terratec a DN1800 microtunnelling system comprising a slurry MTBM, slurry transport system, main jacking station, intermediate jacking stations, lubrication system and a lubrication plant. The pipes to be installed by the MTBM have an i.d. of 1,800mm and an o.d. of 2,120mm. The tunnelling drives are planned to have a maximum distance between shafts of 380m (for the river crossing) up to a total of three or four intermediate jacking stations as required.
- KTE plans to start the pipe jacking work early next month (March 2014). Terratec will also be providing key on site personnel to assist the client during the initial stages of the tunnelling works.
- The project, once complete, will provide a 53km-long pipeline connection from the east side of Chao Praya River to the Bang-Pra Reservoir. Water sent to the reservoir will then be treated and distributed to support the largest industrial area in Thailand.
- A new DN1500 microtunnelling system from Terratec is ready to start work on various drainage projects in Bangkok. At a ceremony at its works in Thailand in July, the TBM manufacturer completed the factory acceptance tests in the presence of representatives of the buyer, Nawarat Patanakarn plc.
Terratec microtunneller ready for dispatch
- The Terratec MTBM is a pipe jacking system designed to handle standard concrete pipes of 1,500mm, 1,800mm and 2,500mm in length. These are to be used by Nawarat Patanakarn for different drainage projects in the Thai capital for the Bangkok Metropolitan Administration (BMA). The microtunnelling system is designed to excavate tunnel drives of up to 350m long and with the assistance of one or two Intermediate jacking stations as needed. The scope of the Terratec supply order includes the microtunnelling machine, the main jacking station, intermediate jacking stations, the slurry transport system, a digital guidance system and a remote control room on the surface housing the operation panel and power pack.
- The system was designed by Terratec at its engineering centre in Hobart, Tasmania in Australia, and the production and assembly was completed at the company's new fabrication plant in Thailand, with key components supplied mainly from Australia and Japan. In the last two years, the company has supplied 14 microtunelling systems of diameters ranging from 300mm to 1800mm in south east Asia region. This was a principal reason by Terratec's management to establish the production and maintenance centre of its microtunnelling division in Thailand.
- Terratec designs, manufactures and supplies TBMs and raise boring machines. With current orders for pipe jacking systems, the company completes its range of tunnelling machinery and making a move also into the small diameter TBM tunnelling market.
Microtunnelling move by Terratec in Thailand 14 Aug 2013
Terratec News Release
Bangkok Metro Blue Line Extension begins - TunnelTalk, September 2012
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