Herrenknecht sweeps Doha metro Phase 1 22 Jan 2014
Peter Kenyon, TunnelTalk
Order of five Herrenknecht EPBMs for excavation of the Red Line South in Doha completes a clean sweep by the German manufacturer of all 15 machines for the first tunnelling stage of Phase 1.
Red Line North (Impregilo/SK/Galfar - 4 x EPBM)

Red Line North
(Impregilo/SK/Galfar - 4 x EPBM)

Red Line South (Qatar Diar/Vinci - 5 x TBM)

Red Line South
(Qatar Diar/Vinci - 5 x TBM)

Green Line (Porr/Saudi Binladen/HBK - 6 x EPBM)

Green Line
(Porr/Saudi Binladen/HBK - 6 x EPBM)

Gold Line (construction yet to be awarded)

Gold Line
(construction yet to be awarded)

The order is placed by the Qatar Diar/Vinci Construction (QDVC) JV that was awarded the US$2.05 billion contract to excavate 13.8km of twin-running tunnels and six underground stations between the network's flagship new central hub at Msheireb Station, and Doha Airport.
"The diameter of all EPB machines for the Doha metro is 7.05m. First workshop acceptances will take place in the next few weeks, followed by a step-by-step rollout programme," a Herrenknecht spokesman told TunnelTalk from the company's headquarters in Schwanau, Germany.
As reported exclusively by TunnelTalk last week, Herrenknecht will supply four further EPB machines for excavation of the 11km twin-running underground section of Red Line North between Msherireb Station in downtown Doha, and Qatar University to the north.
Phase 1 Doha metro underground construction

Phase 1 Doha metro underground construction

Contract scope also includes 16 sets of segment moulds for production of the concrete segmental linings. This order is placed by the Impregilo/SK Engineering/Galfar JV contractor team, which won the US$2.3 billion contract for tunnels and construction of seven underground stations on the Red Line North from project owner Qatar Rail in June last year.
Herrenknecht is also to manufacture and supply six further EPBMs to the Porr/Saudi Binladen/HBK JV contractor for excavation of the Green Line, which in the first phase runs underground for 16km between Education City Station and the Al Rayyan International soccer stadium in the west of the city, and Msheireb in downtown Doha. Contract scope also includes supply of 20 sets of segment moulds.
The excavation contract, which also includes construction of six underground stations, was awarded by Qatar Rail in June last year for a contract sum of US$2.6 billion. A further 20km of twin running tunnels will be required to complete the Green Line in Phase 2.

Excavation schedule for Doha metro hub at Msheireb

Award of the contract for underground construction of the 13km of twin running tunnels and nine stations required to complete the first phase of the east-west Gold Line is not yet made, though qualifying JV teams have been shortlisted.
The prequalification stage for the 17.5km long underground section of the semi circular Blue Line that will link Airport City and West Bay Central is yet to get under way.
Msheireb Station
Construction of the new Msheireb Station, and another of the network's main stations at Education City on the Green Line, is already under way under a separate construction contract held by the Samsung/OHL/Qatar Building Company JV. Estimated construction time for Msheireb is 58 months, with diaphragm walls expected to be complete by April (2014), and all excavations at the downtown jobsite by 2015.
Doha rolls out metro contracts - TunnelTalk, June 2013
Qatar begins Doha metro tunnel awards - TunnelTalk, April 2013
Impregilo-Salini merger creates new tunnel force - TunnelTalk, April 2013
Doha progresses to metro construction - - TunnelTalk, August 2012

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