খিদিরপুর থেকে পার্কস্ট্রিট পর্যন্ত দুটি টিউব টানেল নির্মাণের জন্য টিবিএম দুর্গা এবং দিব্যা ব্যবহার করা হবে । 'কাট অ্যান্ড কভার' পদ্ধতিতে টানেল তৈরি হবে ।
00:00GM Sir has briefed you and PRO Metro Railway is here.
00:26If you have any technical questions I can answer.
00:29We are going to start.
00:34I think English is comfortable.
00:36As you can see we have lowered two tunnel boring machines.
00:39And I am told by my engineers from M&T that this is the first time that two tunnel boring machines have been lowered in one month itself.
00:46And it was very challenging for us because the space constraint is quite huge here.
00:52We are working in a very congested city.
00:54So you see the normally length of a tunnel boring machine is 105 meters.
00:59But we have lowered it in a very small launching shaft of 37 meters.
01:02So you see a part of the tunnel boring machine has been lowered and the remaining endings are here.
01:06And they are being connected by umbilical cords.
01:09So we have innovated and improvised to minimize the launching shaft requirement.
01:15And at the same time successfully launch the TBM.
01:18So now the TBM today has started and we are expecting our first breakthrough.
01:21That is we will reach from here to Victoria by May 26th that is next year.
01:26And we expect to reach Park Street by December 26th next year.
01:30We have already mapped all the important heritage buildings and we have taken all new chairs in terms of DCS
01:51that's called the Building Condition Survey and the Instrumentation to regularly monitoring the effects of vibration and noise levels whatever are there.
01:58And all the questions have been taken to ensure that no possible incident happens.
02:03For constructing this 1.7 kilometer stretch, it would take one year for constructing both the tunnels?
02:11Approximately yes, we are targeting a yield of about 8 to 9 months.
02:14That is why I said May 26th is what we are targeting to have the first breakthrough.
02:19Normally these tunnel boring machines for the first month they take to stabilize what we call as the initial drive.
02:24And then we expect a progress of about 200 meters per month.
02:27So approximately 8 months in that and 1 month.
02:30So by that logic we are expecting it will be May 26th next year.
02:33After reaching Victoria once again you have to reassemble the tunnel boring machines.
02:37Yeah, we will return and relaunch it after the Victoria station.
02:40And then the second drive is 900 meters drive from Victoria to Park Street.
02:45Okay, what would be the diameter of the tunnels?
02:47The internal finish diameter is 5.8 meter.
02:50And outer part?
02:51Outer is 275 mm thickness of the ringa.
02:54So what is important is the inner finish diameter 5.8 meters.
02:57Okay.
02:58I think that actually is enough.
02:59Right here.
03:00Okay.
03:01More money inside.
03:02happening within the centuries.
03:03Right here.
03:04Then the door arises.
03:05And this is a good sign of the hook and Чunkier.
03:07You may be putting a deal types a little bit.
03:08Okay now the other thing.
03:09Wait.
03:10We're going to leave this much.
03:11As a DO later, it's almost 23.
03:12And if Cheese well at the shrink area where we have to be gathered through ...