I am dissappointed that Gülermak-Tata did not choose the Turkish TBM manufacturer E-BERK. But then, it is not surprising that they go for Terratec. It is not the first time they are using Terratec. Actually also in the Lucknow project they had used Terratec:

(image credential: Gülermak website)

Absolutely good decision. Both companies have vast experience working with Terratec machines,

Gülermak uses Terratec TBMs also in İstanbul metros. They are hooked to Terratec. On one side, I am happy that they choose Terratec instead of Herrenknecht but it pisses me off also that they do not choose E-BERK TBMs.

Terratec claims to have supplied 22 (twenty-two) TBMs to India in the past 6 years. Not bad. Not bad at all...

http://www.terratec.co/NewsInfos/detail/70

Terratec is from China?

Yes and no. It is an Australian company but I think they build everything in China.

Somehow Gülermak champions the use of Terratec. As far as I know, the only place Terratec could sell in Europe was in Turkey (Istanbul metro) and then Gülermak was the operator.

Somehow those guys are infected by Terratec. Reasons are not clear to me.If it is the price, I am sure CREG is cheaper than Terratec and probably also at least as good. What the heck? Anybody who can get the picture, please come forward!

Actually @Lutz it is not entirely correct. Gulermak uses all sorts of TBMs. I know for fact is that for example they are using a (or two)  Herrenknecht S-325 for Izmır metro in western Turkey.

They are just choosing whatever is the best fit for a given project I guess.

I know Gulermak from Dubai metro. True professionals. It was a joint venture but in practise gularmak did the work in Dubai

India is the second biggest tunnelling potential in the world after China. India should develop its own tunnel boring machine.

in an international conference i talk to a turkish tunnel manager. He told me that they have two tunnels. One they use herrenknecht and other one they use terratec. they start boring same time. after some time (het told me but i forget) herrenknecht was x meter ahead of terratec. he told me to say that herrenknecht is better than terratec. I don't know. turks are not objective. they love germans more than they love themselves.

@Erdem Companies make their TBM purchases , like any other purchase they make, based on business interests and only business interests. And this is very normal.

@lutz GULMERK is using TERRATEC because they have a back end backup in the contract which E-BERK is totally lagging behind , and if you say creg is cheaper then TERRATEC in that condition also creg till date they don't have a back end back up for clients as previously it was used in India (don't want to name the client) but machine was good but no service ....... And in end want to conclude E-BERK won't be able to get a market in my opinion because upcoming projects in India are really very tough and on a serious note in many condition also even the world best tbm manufacturer or brand fails in those geology so I don't want to disappoint E-BERK but their machine won't be able to make it .

@Pankaj I don't know about their TBMs but I thought e-berk had great TBM cutters?  An Aussie colleague of mine working at a European site was telling me that their cutters were as sharp and durable as diamonds

@michael don't want to comment on their quality.... But in India there is a project in Mumbai (Mumbai metro line 3) on that only one client is using eberk cutters and best part is now that client have to bring in new TBM now I don't want to comment on anything I gave you hint now you can do a deep research the client name is SOMA-DOGUS jv

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@michael here few pictures of the tbm which we are talking about 

but the Issue is neither Indian nor Turkish are so small that they are installing micro size manlock that also single tube .this is 6 dia epb tbm if they say space problem then I have no words for them

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Great pics. But what problem are we talking about?

The size of manlock is too small comparatively to a regular one and that also it's a one line tube where decompression will a issue .

Initially 2+1 or 3+1 miners go inside to work but here I feel and with experience I'm saying it will cause problem it they went for HYPERBARIC intervention. 

@Pankaj How did the problem surface? Is this Terratec in operation and boring now?