Representatives from Bangkok’s Mass Rapid Transit Authority of Thailand, contractor ITD-NWR MRT Joint Venture, and TBM supplier TERRATEC have celebrated the successful Factory Acceptance Test of a new 6.39m diameter EPBM which will be deployed for the construction of the Bangkok Metro Purple Line (C3). The second Factory Acceptance Test for another EPBM will take place in April 2024.
The two TERRATEC EPBMs will be utilized to construct a total tunnel length of 3.12km, connecting Phan Fa Station to Memorial Bridge Station across two metro stations.
The project encounters several challenges, particularly in navigating the TBMs through the historic area of the old Bangkok capital, which houses landmarks like the Grand Place and old temple. Another significant aspect of the project is the interchange station at Sam Yod, connecting the Purple Line with the existing Blue Line MRT. The Purple Line will pass beneath the operational Blue Line tunnels. Additionally, the TBMs will drive under the Chao Phraya River for a stretch of 150m.
The geological conditions along the tunnel alignments will encompass soft clay, stiff clay, dense clayey & silty sand. To accommodate these conditions, the TBM’s soft ground cutterhead has been equipped with a flat spoke type with copy cutters.
During the construction process, traditionally reinforced, 275mm thick by 1400m wide, Universal reinforced concrete segments (5 + 1) will be installed as the machine progresses. Muck removal, segment transport, and the supply of consumables will be facilitated by rail-bound equipment using battery locomotives.
The Bangkok Metro Purple Line, spanning a length of 23.63km and serving the northwestern area of Bangkok from Tao Poon to Klong Bang Phai in Nonthaburi Province, is the fifth rapid transit line. Its southern extension, which comprises a 14.3km underground section and a 9.3km elevated section, commenced construction in August 2022 and includes a total of 17 stations.
Representatives from Bangkok’s Mass Rapid Transit Authority of Thailand, contractor ITD-NWR MRT Joint Venture, and TBM supplier TERRATEC have celebrated...
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