गोष्ट मुंबईची भाग:१२६।अशी तयार होतेय, मुंबईच्या भूगर्भातून धावणारी 'मुंबई मेट्रो ३'
मुंबई मेट्रो- ३ हा कुलाबा- कफ परेड ते आरे असा तब्बल ३३.५ किलोमीटर्सचा संपूर्णत: भुयारी असा मेट्रो मार्ग आहे. भूगर्भीय आव्हानं ही सर्वात मोठी होती. त्यासाठी प्रत्येक ५० मीटर्स अंतरावर बोअर खणून भूगर्भातील खडकांचे नमुने गोळा करण्यात आले. त्या नमुन्यांचा अभ्यास करून तब्बल १७ टनेल बोअरिंग मशिन्स एकाच वेळेस मुंबईच्या भूगर्भात कार्यरत करून भुयारी खणून त्यांची जोडणीही करण्यात आली. ही टीबीएम मशिन्स हा तंत्रज्ञानाचा एक वेगळा आविष्कारच आहे. समोरच्या बाजूने कटरच्या माध्यमातून खडक फोडत मशीन पुढे सरकत असताना मागच्या बाजूस खणलेल्या भुयाराच्या संरक्षक भिंती उभ्यारण्याचे तसेच त्यांच्या सुरक्षिततेसाठी लायनिंगचे कामही एकाच वेळेस करण्यात आले. त्यामुळे वेळही वाचला आणि एकच वेळेस दोन कामेही पार पडली! आता येत्या सहा महिन्यात या मेट्रो३ च्या पहिला मार्ग आरे ते बीकेसी मुंबईकरांसाठी खुला होणे अपेक्षित आहे. मेट्रोच्या एमआयडीसी भुयारी स्थानकामध्ये जाऊन घेतलेला एक वेगळा शोध...
#गोष्टमुंबईची #GoshtMumbaichi #mumbai #knowyourcity #KYCMumbai #mumbaimetro #metro3 #metroproject #mmrcl #mumbaimetr3
#गोष्टमुंबईची #GoshtMumbaichi #mumbai #knowyourcity #KYCMumbai #mumbaimetro #metro3 #metroproject #mmrcl #mumbaimetr3
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NewsTranscript
00:00 We surveyed the water and rock deposits in Mumbai's Bhoogarbat before.
00:06 The heritage of South Mumbai dates back to 100-150 years.
00:10 We didn't cover even a small area. We dug a well to put the machine underground.
00:19 We assembled the parts and started working under the ground.
00:23 We studied the water levels in different places and took it to the next level.
00:30 Hello, I am Vinayak Parabh and I am here with the second episode of Ghost Mumbai.
00:50 In this second episode, we explored the ancient Mumbai.
00:55 We also explored the modern Mumbai.
01:00 I have used the word 'modern' a lot.
01:02 'Atyadhunik Mumbai' means 'Ati-Adhunik Mumbai'.
01:06 The metro that is being built in Mumbai is the most modern Mumbai.
01:15 The metro that runs from Mumbai's Bhoogarbat.
01:18 The metro is a new building in Mumbai.
01:22 We will explore the metro in Mumbai.
01:28 We will find out the importance of the metro.
01:32 The Mumbaians might have some doubts.
01:36 We will find out the answers to all these questions.
01:41 [Music]
01:51 [Music]
02:17 We have with us the MMRCL's Executive Director, Civil Charuhas Jadhav.
02:33 Jadhav Sir will explain the importance of the metro.
02:37 Jadhav Sir, we would like to know the meaning of the metro.
02:45 The metro is 33.5 km long and is a completely built metro.
02:55 You might know that Mumbai is made up of 7 cities.
02:59 We have built a complete landmass by connecting the cities.
03:05 We surveyed the city to find out where to build a new metro.
03:19 We dug a borehole every 250 m.
03:23 We fixed the alignment.
03:27 This was a big challenge.
03:31 The city is limited in number of places.
03:35 There are many old buildings and heritage buildings.
03:39 All these components were aligned.
03:45 We shifted the old buildings and built permanent houses.
03:49 We took care of the old buildings and built a metro line.
03:53 There are 100-150 years old heritage buildings in South Mumbai.
04:01 We did not cover a small part of the heritage buildings.
04:05 We built towers to take the road from the borehole.
04:09 We built a tunnel under the towers.
04:11 These were all the challenges.
04:13 The biggest challenge we faced was the R.A. colony.
04:17 Mumbai is aware of this.
04:21 We fought court cases for 5 years.
04:25 Then we started this work.
04:27 We faced these challenges in Mumbai Metro Line 3.
04:33 We have reached this stage now.
04:37 The last 2 years have been spent in the corona pandemic.
04:43 How much impact has it had?
04:45 When the lockdown started, the country was closed.
04:50 The first 20-25 days, there was no work.
04:54 Then the government started to give facilities.
05:00 5% people can come.
05:02 10% people from the government sector can come.
05:04 People from the emergency services should come.
05:08 We took advantage of this and started the work of the metro again.
05:13 There were other challenges. Interstate services were shut down.
05:20 People were stuck in the villages.
05:24 We faced this for a year.
05:29 It took a long time to regularize.
05:34 You mentioned an important thing in the different obstacles and challenges.
05:41 Geological challenges.
05:46 Hard rock is different in some places.
05:48 We have heard that the metro has used technology in a good way.
05:55 For example, the tunnel boring machine.
06:00 We used it.
06:02 At the same time, work was started in 15-17 places.
06:07 How does the tunnel boring machine know which way to go?
06:14 Suppose it goes to the side, it will be a mess.
06:17 Tell us about the technology used in this.
06:24 That's a good question.
06:26 When we make alignment in the tunnel boring machine,
06:29 we do not make a simple alignment.
06:33 We have to make different types of turns.
06:37 We have to make it from the right side.
06:39 While doing that, we have GPS coordinates.
06:41 According to the Global Positioning System,
06:43 we are standing here.
06:45 There is a unique coordinate of this point.
06:48 That is why we had fixed all these coordinates.
06:52 When we started the tunnel boring machine and started the alignment,
06:58 there is a laser beam that guides it.
07:01 Using that laser beam, we have taken care of the alignment.
07:09 It has been done that the technology is used in such a way
07:14 that it goes to the next side and the lining is done from the back.
07:18 How did it happen? Tell us about it.
07:20 Tunnel boring machine has a main part called cutter head.
07:27 You said that it is the actual cutter.
07:29 Yes.
07:30 There are various components of the tunnel boring machine
07:34 from 80 to 100 meters behind it.
07:37 One of the components is that the lining that you see here,
07:43 it is divided into 6 parts.
07:47 We cast it outside in the casting yard.
07:50 After that, it is brought inside.
07:53 As the tunnel boring machine moves forward,
07:56 there is a machine in it to make the lining stand.
08:00 This lining is 1.4 meters long.
08:04 If the tunnel moves forward by 1.4 meters,
08:07 the lining is made to stand.
08:09 So, both work at the same time.
08:11 Yes.
08:12 It also provides safety.
08:14 If we go ahead and the back part falls,
08:16 it does not happen.
08:18 That is why the lining is supported.
08:20 So, time is saved.
08:22 Yes.
08:23 You said that at one time,
08:26 17 tunnel boring machines were operating.
08:28 How did you coordinate this?
08:30 Because only if they are coordinated properly,
08:33 they can be moved from one place to another.
08:37 Correct.
08:38 We had a project of 33 kilometers.
08:41 We had divided it into 7 parts.
08:43 We had made 7 packages.
08:45 In each package, there were 2, 3, 6 machines.
08:51 We had divided the machines in different places.
08:57 We had dug a big well to put the machines in the ground.
09:05 We assembled each part and started working under the ground.
09:11 Okay.
09:12 If you look at the two packages here,
09:15 Package 7 and Package 6,
09:17 the machines here went out from the station of Package 6.
09:22 Okay.
09:23 So, we had coordinated it like this.
09:27 Okay.
09:28 In the minds of the people of Mumbai,
09:30 after the storm, there was a question.
09:33 After the storm, there was water everywhere in Mumbai.
09:37 At that time, the people of Mumbai started discussing on social media
09:40 that there is so much water above,
09:42 the metro will go from below,
09:43 what to do if there is water there?
09:45 So, in that context, I feel that the people of Mumbai
09:48 have to do the discussion of this problem
09:50 as an MMRCL official.
09:53 Definitely.
09:54 I would be proud to say that
09:56 even after so much rain,
09:58 there is no water in the Mumbai Metro Line 3,
10:00 tunnel or station.
10:05 This means that the work has been done very well.
10:08 The work has been done very well
10:09 because we had planned the study for it.
10:13 Now, we have studied the water level in different places
10:16 on the roads of Mumbai
10:19 and taken the plinth level above that level.
10:23 Okay.
10:24 That is, every place is about 4.5 to 5 feet above the plinth
10:29 from the road,
10:30 that is, the entry level.
10:32 Okay.
10:33 The second, the hole dug by the station,
10:37 on all four sides,
10:39 polyurethane sheets have been applied
10:43 and water proofing has been done.
10:45 Okay.
10:46 Similarly, in the tunnel,
10:48 as we said earlier,
10:49 the concrete lining has been applied.
10:51 Correct.
10:52 After applying the concrete lining,
10:54 the cementitious ground has been filled
10:57 in the place between it and the natural rock.
11:00 Okay.
11:01 So, the water will not flow from inside.
11:03 Similarly, in between the two joints,
11:05 in between the two concrete linings,
11:07 a hydrophobic rubber gasket has been applied.
11:10 Okay.
11:11 That is, when water is applied to it, it will swell
11:13 and water will not flow inside.
11:14 Friends, in this entire section,
11:17 we just had a conversation with Charuhas Jadhav.
11:20 And we must have noticed
11:22 how big obstacles and how big obstacles
11:25 were on the way of Metro 3.
11:28 And on that, in a very good way,
11:30 using the modern technology,
11:32 using technology,
11:33 they have been able to overcome it in a very good way.
11:36 The most important question
11:38 that was in the minds of the Mumbaikars
11:39 in this rainy season,
11:40 I think you all must have got a very good answer to it.
11:45 Charuhas Jadhav told us
11:47 how good technology has been used.
11:49 Not one, not two,
11:50 but four to five different layers have been used.
11:53 Because of that, in this Metro of Mumbai,
11:55 water that can be seen in a bucket will not flow.
11:58 In the context of Mumbai Metro,
12:00 more and more important,
12:02 interesting, different things
12:05 we will understand in the next section.
12:08 Till then, keep watching Lok Satta Live YouTube channel.
12:11 Watch, share and don't forget to like.
12:15 [Music]