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Tuesday, March 9, 2021

Four more tunnel boring machines arrive in Qatar to dig for metro

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All photos courtesy of Qatar Rail

Qatar has acquired five of the 21 mammoth tunnel boring machines (TBMs) it needs to help dig the underground stations and railways for the Doha Metro.

Four of them arrived at the Doha Port this week: Al Mayeda, Al Khor, Lehwaila and Al Wakra, which were all manufactured by Germany-based Herrenknecht. They, along with Lebretha, which arrived in April, will be used to bore tunnels for the Red Line North and South underground projects.

Some 10 stations are expected to be completed for the Red Line North (which links Msheireb to the Doha Golf Course via West Bay) and eight stations for the Red Line South (which links Msheireb to Hamad International Airport) in the first phase of construction.

It and parts of the Gold and Green lines, which will use six TBMs each, are expected to open to passenger traffic in 2019.

In a statement, Qatar Rail said:

“Each TBM will travel a distance of between 7-9 km and will take approx. 2 years to complete their respective journeys. The TBM average speed will be between 12m/day to 21m/day, depending on ground conditions. Daily excavation quantity will be over 600m³, with an estimated predicted total excavation quantity of over 5,000,000m³.”

However, digging won’t begin just yet. The TBMs must be disassembled into smaller pieces at the Doha Port before being transferred to the construction sites, due to their large size. They will then be reassembled onsite, a process that takes up to a few months.

The TBMS will be used to cut circular holes in the ground some 20 meters beneath Doha for all the lines. Previously, Qatar Rail officials said all 21 machines would be working by 2015, adding that residents may feel “minor vibrations” during work.

However, in today’s statement, officials said the tunneling would be “practically unknown to the population above.”

Thoughts?

13 COMMENTS

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DavidRSS8
DavidRSS8
6 years ago

Does this make anyone else nervous?

sicti
sicti
6 years ago
Reply to  DavidRSS8

yes, indeed

MrJames
MrJames
6 years ago

Given current standards of construction and organisation in Qatar, there is NO WAY EVER I will venture into an underground Metro station. Dousing myself in petrol and having a barbecue would be safer.

Saffa
Saffa
6 years ago
Reply to  MrJames

You ever been on the London Underground? You are aware some of those tunnels date from the turn of the 20th Century?

MIMH
MIMH
6 years ago
Reply to  Saffa

But it is still 1640 in Qatar with the labour they use, so those London tunnels are still more advanced….

Saffa
Saffa
6 years ago
Reply to  MIMH

MIMH, they’ve moved on and re-framed and re-branded, it’s no longer called slavery… I’d say that’s pretty 21st century 😉

Engineer on Doha Metro
Engineer on Doha Metro
6 years ago
Reply to  Saffa

Some of the best designers from around the world are working to create this world class facility.
construction follows an intense testing phase. So all you out there need not worry

Saffa
Saffa
6 years ago

EoDM: All built by the cheapest contractor…. just saying ;-). Gotta give it to QRC tho, their job sites all look pretty neat and tidy, which is a good sign from the start, and they’ve clearly thought some of their issues through like spoil removal viz the conveyor installation for the dig near the tennis stadium in Al Bidda street

desertCard
desertCard
6 years ago

Looks more like an ICBM than TBM

truth.e.ness
truth.e.ness
6 years ago

Boring? Maybe to you!

wee_johnnie
wee_johnnie
6 years ago

They don’t look that large sitting on top of the trailers. Surely can’t cause more problems than already on the roads trundling through Doha like that. Pick a quiet time in the middle of the night and go for it.

Saffa
Saffa
6 years ago
Reply to  wee_johnnie

Those are just component parts. The cutting heads will be 7m diameter if I recall correctly.

luuke
luuke
6 years ago

Calm down Qatar….Are you’ll on steroids ?? Things collapse….How old is your country….Build with heritage not with this monstrosity….

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