Indian Roads Thread

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Jarita
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Re: Indian Roads Thread

Postby Jarita » 28 Sep 2021 10:02

https://timesofindia.indiatimes.com/cit ... 522381.cms

Gujarat: Don’t widen road inside Gir sanctuary, say experts

Read more at:
http://timesofindia.indiatimes.com/arti ... aign=cppst

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Re: Indian Roads Thread

Postby Vips » 30 Sep 2021 10:13

Gadkari reviews construction work of all-weather Zojila, Z-Morh tunnels on Srinagar-Leh highway.

Union Minister Nitin Gadkari on Tuesday reviewed the construction work of strategically important Zojila and Z-Morh tunnels on the Srinagar-Leh highway.

Speaking to reporters at the Z-Morh tunnel site, Gadkari said his ministry is also building 20 tunnels of a total length of 32 km in Jammu and Kashmir and 11 tunnels of a total length of 20 km in Ladakh. The cost of building these 31 tunnels in Union territories of Jammu & Kashmir and Ladakh will be around Rs 1.4 lakh crore, the road transport and highways minister said.

The Union minister for road transport and highways also said all the projects undertaken by the BJP-led central government should be completed before the 2024 general elections.

He said there will be no compromise on the quality of the construction.

Gadkari also said that in the past two years, the Modi government has been able to do the same amount of work related to road projects in Jammu and Kashmir that earlier took 50 years.

The Z-Morh tunnel between Gagangir and Sonmarg will provide connectivity in all weather conditions between Srinagar in Jammu and Kashmir and Kargil in Ladakh. The Zojila tunnel between Baltal and Minamarg on the Srinagar-Leh section will provide all-year connectivity between Leh and Srinagar.

“I have told them (executing agency) to complete the work on Zojila tunnel by December 2023 so that Prime Minister (Narendra Modi) inaugurates it before January 26 (2024). The deadline of 2023 is also because we have the (Lok Sabha) polls in 2024,” Gadkari told reporters at a press conference at the tunnel site here. Gadkari said all the work should be done before 2024 polls, “otherwise people will take us to task”.

The minister said he was happy with the pace and quality of the work on both the projects and congratulated the executing agencies – APCO for the Z-Morh tunnel and MEIL for the Zojila tunnel.

He said after the completion of the Z-Morh tunnel, the local tourism economy will get a boost. Gadkari noted that tourism is the sector where 49 per cent of capital expenditure happens on the employment generation.

About the Zojila tunnel, he said it will not only be the longest bi-directional tunnel in Asia but also the world’s highest tunnel at the height of 11,575 feet above the ground.

Saying that there was no such word as impossible in his dictionary, Gadkari said he was sure the fresh deadline would be met on the treacherous landscape.

The Union minister said after the completion of both the tunnel projects, the travel on Srinagar-Leh and Manali-Leh highways would be a lot easier. “This will be a heaven.This highway is a lifeline for the people (here) and these tunnels will ease their sufferings. The aim is to increase the economic growth, employment potential and promote handloom and handicrafts,” he said. The travel time on these routes will be substantially reduced after the completion of the projects, he added.

The travel time on Zojila pass is 3.5 hours currently but through the tunnel, the journey can be completed within 15 minutes, he said.

“Not only for the people here, the tunnels will also bring ease for the pilgrims of the annual Amarnath Yatra here,” he said. He also said the ministry will study whether a second tube can be added to the project and was also seeing how to further ease the journey to the Holy Cave of Amaranth.

Asked whether the speed of construction work of the Z-Morh tunnel increased after Jammu and Kashmir, and Ladakh became Union territories, Gadkari said, “These issues are for you to evaluate (ye sab baaten apke adhyan aur chintan ke liye hai).”

The project cost of the Z-Morh tunnel is Rs 2,300 crore. The 6.5-km-long Z-Morh tunnel project is under the National Highways and Infrastructure Development Corporation Limited (NHIDCL). For the Z-Morh tunnel, there is a five-km approach road and the tunnel is 6.5-km long and is bi-directional. It also has an escape tunnel for emergencies.

Gadkari also said he has directed the officials of National Highways and Infrastructure Development Corporation Limited (NHIDCL) to take a beautification project on the Srinagar-Leh and Srinagar-Jammu highways.

Gadkari also said the ministry was studying a proposal to construct a rope-way from Sonamarg to Thajwas glacier and seven lakes to increase the tourism potential in the area.

On a question about the construction works on the Srinagar-Jammu national highway which remains cut off due to landslides every now and then, Gadkari said there have been some problems, but those are being taken care of.

“The consultant on that has failed and we are taking action. More funds have been allotted and we have changed the designs, and the work on it will be completed in the next two years,” he added.

He assured that the after two years, the travel time between Srinagar and Jammu will be about three hours.

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Re: Indian Roads Thread

Postby vsunder » 02 Oct 2021 22:48

They have hit water inside the Zojila tunnel. Same issues plagued the Atal tunnel. Lets hope they find a quick and sound solution to be on schedule.


https://mobile.twitter.com/Sahilinfra2/ ... 2745001988

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Re: Indian Roads Thread

Postby Vips » 03 Oct 2021 21:25

Till now the contracting company Megha Engineering and NHDCIL officials were confident of finishing the Zojila tunnel by 2024 based on the good speed of tunneling achieved due to the dry rock section but if the water seepage is encountered in more sections then this will considerably slow down the tunneling speed and it would be difficult to maintain even the original 2026 timeline. In similar conditions Atal Tunnel took nearly 10 years to complete instead of the planned six years.

One difference now is with increasing experience of Indian companies in constructing tunnels in challenging conditions in J&K and more heavy equipment like ice cutters being sourced from abroad, operations are being carried out even in the winter months (this happened at the Zojila site last year) when earlier it would completely stop for at least 4-6 months.

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Re: Indian Roads Thread

Postby vsunder » 13 Oct 2021 00:09

https://mobile.twitter.com/Sahilinfra2/ ... 1229571076

Z-Morh tunnel. Lining works to start from Eastern portal of main tunnel as breakthrough was achieved in main tunnel last month. They are trying to finish lining the escape tunnel by November so that emergency vehicles can use it when Sonamarg is snowbound and the existing road is snowed in due to the high pass it traverses.

Sela tunnel on the road to Tawang is the next project I expect a breakthrough. The escape tunnel of 980m had a breakthrough in July ahead of schedule. This will facilitate work on the 1555m main tunnel, as both ends can now be worked on and material moved for the approach roads at both ends. The adjoining Nechipu tunnel 500m+ should be close to breakthrough. New target is May 2022, delayed due to Covid. Both tunnels are strategic due to Tawang pass snowbound and also fog on the current road even in summer months.

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Re: Indian Roads Thread

Postby vsunder » 14 Oct 2021 05:49

Tunnels under the Brahmaputra to connect upper Assam
and Arunachal Pradesh

https://mobile.twitter.com/cbdhage/stat ... 8174538753

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Re: Indian Roads Thread

Postby nachiket » 14 Oct 2021 05:54

vsunder wrote:Tunnels under the Brahmaputra to connect upper Assam
and Arunachal Pradesh

https://mobile.twitter.com/cbdhage/stat ... 8174538753

vsunder ji, has any reason been specified why a tunnel is preferred to a bridge at this location? I am assuming constructing a bridge would be cheaper and faster.

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Re: Indian Roads Thread

Postby Vips » 14 Oct 2021 06:25

Cheaper maybe but faster to build is surely doubtful especially if TBM's are used to build the tunnel.

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Re: Indian Roads Thread

Postby Vayutuvan » 14 Oct 2021 06:40

nachiket wrote:vsunder ji, has any reason been specified why a tunnel is preferred to a bridge at this location? I am assuming constructing a bridge would be cheaper and faster.


My guess is that bridges can be bombed by the enemy to disrupt logistics during a war.

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Re: Indian Roads Thread

Postby vsunder » 14 Oct 2021 06:46

I can make some educated guesses.

1. In the opening moments of any war with China, Bogibeel bridge will be a big fat target to be taken down and disrupt movement of men and materiel. They will do it by missiles.

2. A tunnel is better protection against attack.

3. 140km separate the tunnel from the Bogibeel bridge and the tunnel north ban mouth opens up near Tezpur, HQ of IV Corps, Gajraj. So the tunnel is well situated. Geotechnical properties could have also gone into the choice of location.

4. As the tweet says, Kaziranga is nearby and the bridge and approach to it could involve far more stringent environmenatl requirements than a tunnel whose approach could early on go underground.

5. The Brahmaputra has serious floods and changes course and a tunnel is better able to deal with such calamities. Yes Assam has had earthquakes.

6. With the increasing stress on using rivers for navigation and Brahmaputra being already declared IW-2, Inland Waterway Route 2, and barges already operational, bridges pose additional issues and hazards for navigation esp. if there are shoals and the river has a point of constriction where the bridge is being built. Ideally one would like to build a bridge between two points across a river that are close among other factors. A tunnel frees the traffic on the river from such hazards.

However I think ecological clearances can be obtained faster for a tunnel than for a bridge and also making a tunnel will not depend on the season. Construction of bridges comes to a virtual halt during the very strong monsoons in Assam.

Contrary to the Nature conservation thread which is full of rhetoric and ill-informed noise, the current dispensation is paying attention to studies on the movement of wild life both across roads and across railway tracks. Significant measures have been taken at several places to mitigate animals dying. Here are two such reports:


https://www.thebetterindia.com/190973/i ... or-tigers/


https://www.thehitavada.com/Encyc/2021/ ... 2.amp.html


The design of optimal habitats for animals to live in mathematically is similar to designing single crystal blades for the Kaveri engine. There are foundational papers of mine from 30 years ago on the mathematical material science aspect. I was goaded to study this by Japanese engineers. In a subsequent long and difficult paper there is a complete characterization of all the crystal defects that can arise. This is a 2-phase free boundary problem, the solid phase and the liquid/molten metal the second phase. As the metal cools you have no control of the interface and that is the free boundary. Defects form and they are not arbitrary
For example a cross is one possibility in 2 dimensions. Then you have molten/solid/molten/solid around the cross and the arms of the cross meet at 90 degrees. This is rigorous theorem in my paper. It is not some easy stuff and pretty hard to prove.
Same with animals, there is animal zone and the human zone. The boundary between the two is the free boundary. As the animals increase by births, the boundary changes. Two French mathematicians one at Univ. of Toulose where Airbus is and one at Univ. of Marseille then used my work and wrote some papers on animal habitats and optimal design. They have a number of computer simulations of the changing boundary as the animal population increases. You can start with a disk or a square and then put 5 animals in and ask how should I design the optimal habitat for those 5 animals to live in that disk or square. What happens to the boundary of their range as the number of animals goes up to 10 etc.

I do not think they studied the problem fully as to what is the nature of the defects like in the difficult paper of mine. That is still open I think. I do not work on these questions since 14 years now and I do not intend to return to this study possibly after retirement if I feel like it. All papers I talk about are freely available on the internet.

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Re: Indian Roads Thread

Postby Vayutuvan » 14 Oct 2021 06:57

vsunder wrote:IContrary to the Nature conservation thread which is full of rhetoric and ill-informed noise, ...

:mrgreen: :rotfl:
I don't visit that thread often but now you have piqued my curiosity. :twisted:

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Re: Indian Roads Thread

Postby Vayutuvan » 14 Oct 2021 07:24

vsunder wrote:The design of optimal habitats for animals to live in mathematically is similar to designing single crystal blades for the Kaveri engine. There are foundational papers of mine from 30 years ago on the mathematical material science aspect.


Have you done any work in percolation theory? I am interested in percolation theory and numerical continuation problems in countably infinite dimensions. There are no closed-form solutions even for a convex polytope, leave alone other kinds of domains - not even restricted to convex domains. My interest is purely computational. If you are interested, I will take it to the math thread.

Continuum Percolation Theory in a convex domain in the Euclidean space ℝ^n

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Re: Indian Roads Thread

Postby VinodTK » 14 Oct 2021 19:17

India's strategic Sela tunnel near China border: All you need to know

NEW DELHI: Defence minister Rajnath Singh on Thursday presided over the final breakthrough blast of the Sela tunnel in Arunachal Pradesh through a video conference.
The tunnel, located near China border, is expected to give India strategic heft by facilitating faster movement of its troops.
:
:
:
:


nachiket
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Re: Indian Roads Thread

Postby nachiket » 14 Oct 2021 20:37

vsunder wrote:I can make some educated guesses.
...

Thank you for that explanation saar. Makes a lot more sense now.

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Re: Indian Roads Thread

Postby vsunder » 15 Oct 2021 01:57

Currently 9 bridges are being built across the Ganga to better connect North Bihar with South Bihar. Some are in UP. These projects had languished for 25-30 years with foundation stones laid by assorted PMs. Bridges constructed by Gammon in IGs time that failed due to heavy overloading have also been repaired, bearings changed etc. In North Bihar a famous bridge over River Kosi had been destroyed by the Great Bihar earthquake of 1934 and after that never rebuilt, all sorts of PMs since Chacha Nehru made promises and election promises to rebuild, nothing happened. Last year the residents of North Bihar got their spanking new Kosi bridge and train services restored after 1934.

https://en.wikipedia.org/wiki/1934_Nepa ... earthquake

None of this finds space in the national media etc. which is mainly devoted to outrage on all sides.

Some of the bridges are :

1. Ghazipur road and rail bridge in UP, will replace the Shaheed Abdul Hamid PVC bridge which is a pure road bridge and in bad shape due to overloading. Unfortunately bridge work slowed down as Manoj Sinha lost his bid for re-election to Lok Sabha in 2019 and is now J&K governor. But completion is soon maybe one span left:(the train part will provide a relief to busy Mughalsarai/DDU)

https://www.youtube.com/watch?v=2odOwlEvtDQ


2. Munger Bridge:

https://www.youtube.com/watch?v=AAzrr88Ct-k

3. Bakhtiyarpur bridge

https://www.youtube.com/watch?v=R0pyE1bVpps

4. Kacchi Dargah to Bidupur bridge(cable stayed 6 lane)

https://www.youtube.com/watch?v=ZNQDKAQOt_g

https://www.youtube.com/watch?v=M7u0xxzaW4I

5. Gandhi Setu, part of Patna ring road(in English)

https://www.youtube.com/watch?v=_RObnav1Zmc

6. Kosi mega bridge After 90 years traffic opens.

https://www.railway-technology.com/news ... dge-bihar/

https://www.youtube.com/watch?v=3DD8gq3ByEU


A summary of all the bridge over the Ganga projects:
https://www.youtube.com/watch?v=CDZij8KmEEw

PS: By the way I mentioned 2-phase free boundary problem above, so obviously there must be a 1-phase free boundary problem. So what is that, should one study it, yes, yes and yes. 1-phase free boundary problem is one side something like water, other side vacuum. For example think of the propeller of a submarine or ship. The tips of it rotate at supersonic speed. This causes little bubbles to form of vacuum which of course pop. Two bad consequences are (1) Causes pitting of the propeller blades leading to replacement (2) Too many pops and it leads to a noisy sub and easy detection. This phenomenon is called cavitation. So propellers are designed for subs and ships to minimize cavitation. Mathematical knowledge of the free boundary effects is used in the design to minimize Cavitation.


https://en.wikipedia.org/wiki/Cavitation

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Re: Indian Roads Thread

Postby Vips » 15 Oct 2021 03:26

vsunderji,
There is a Youtuber who covers the infra development's in Bihar.
His coverage on the Bridges coming up in Bihar:


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Re: Indian Roads Thread

Postby Cyrano » 15 Oct 2021 15:40

Jarita wrote:https://timesofindia.indiatimes.com/city/ahmedabad/gujarat-dont-widen-road-inside-gir-sanctuary-say-experts/articleshow/86522381.cms

Gujarat: Don’t widen road inside Gir sanctuary, say experts

Read more at:
http://timesofindia.indiatimes.com/arti ... aign=cppst


Having been fortunate enough to visit Gir reserve and seen these magnificent lions and leopards, jackals, various deer, birds and more some years ago, I can say preserving such treasures is more important than ANY development benefits. Cant bring back an extinct species or ecosystem.

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Re: Indian Roads Thread

Postby vsunder » 15 Oct 2021 18:40

So it has happened, see above ^^^. I had expected a breakthrough next month. Shri Rajnath Singh RM, has initiated the final breakthrough of the Sela tunnel yesterday. This is a very important project that ensures all weather connectivity to Tawang. This a twin tunnel project. The smaller Nechipu tunnel at 475m is scheduled for completion in May 2022. The longer tunnel is 1555m on which breakthrough was achieved. The 980m escape tunnel in parallel to the 1555m main tunnel had a breakthrough in July this year.

https://twitter.com/rajnathsingh/status ... 6436896768


https://timesofindia.indiatimes.com/ind ... 015341.cms

3 tunnels in all, with two of them bored through. Smaller one left.

https://m.youtube.com/watch?v=Vs9WnCnW07E

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Re: Indian Roads Thread

Postby vsunder » 15 Oct 2021 23:47

Looks like for the smaller Nechipu tunnel about 475m BRO made good progress for the 100-200 m section. 41 days. For the first 100m 73 days. So about 275 m left and completion time is May 2022. May be tight as they have to line the tunnel. But breakthrough in 3 months is very likely. Road to Tawang is in good shape and about time as things heated up there recently.


https://mobile.twitter.com/broindia/sta ... 0740798464


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