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Most people know about the metro tunnels in Delhi, Kolkata and the U/C ones in Bangalore and Chennai. However this thread is for images and updates of all other tunneling projects that have been executed and are being executed in India right now.
 

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Veligonda Project, Andhra Pradesh



Employment: Water
Geology: Quartzite, shale, phyllite
Tunnel Length: 18,800 m
Diameter: 7,960 mm

Machine Type: Double Shield TBM
Support Techniques: Segmental Lining
Cutterhead Power: 2,800 kW
Torque: 4,984 kNm

With a tunnel length of almost 19 kilometers, the Veligonda project near Hyderabad is one of the most challenging in India. The line of the tunnel passes through the “Rajeev Gandhi” nature reserve – well-known for its tigers. The aim of the project is to tap into the Srisailam dam with an underground tunnel, so that water can be diverted to drought-ridden areas when the dam threatens to burst its banks during the monsoon season.



A huge Herrenknecht Hard Rock Double Shield is currently at work on the project. The 2,800kW TBM is boring the 18.8 kilometer-long tunnel at depths of as much as 550 meters. On-site support for the project is being provided by Herrenknecht subsidiary, Underground Technology Service (UTS). Two full UTS crews are assisting the tunnelling operation in the first six months. Together with colleagues from the Herrenknecht project management teams, they monitored the assembly and start-up of the TBM and segment production plant, they are managing the cutter shop and handling spare parts supply on the site.






 

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Godavari River Crossing, Andhra Pradesh - part of the 1,386 km East-West Gas pipeline project

Employment: Gas
Geology: sand, clay, silt
Tunnel Length: 2,400 m
Diameter: 2,885 mm

Machine Type: EPB Shield
Support Techniques: Pipe Jacking
Cutterhead Power : 400 kW
Torque: 1,020 kNm

India’s economy is booming. To meet the country’s growing energy demand, India increasingly relies on natural gas. By 2025, natural gas is planned to make up a fifth of the country’s energy mix. To achieve this goal, the 1,386 kilometer long »East-West Gas Pipeline« will be laid on the subcontinent. Beneath the Godavari River in Southwest India, a 2,400 meter long casing tunnel has to be driven beneath the riverbed before the summer monsoon makes the River burst its banks.





Tunnelling works under time pressure – no problem for the two identical EPB Shield´s made by Herrenknecht. The two machines start tunnelling from both riverbanks – reaching their target in the middle of the river after only three months. This leaves enough time to pull the prefabricated gas pipeline into the casing tunnel using the Herrenknecht Pipe Thruster before the flood waters arrive. And make the expansion of the natural gas network take one giant step forward.







 

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Ghatkopar High Level Tunnel, Mumbai

Employment: Sewage
Geology: Massive and weathered basalt
Tunnel Length: 2,600 m
Diameter: 3,065 mm

Machine Type: Single Shield TBM
Support Techniques: Segmental Lining
Cutterhead Power : 500 kW
Torque: 1,800 kNm

The Indian city of Mumbai (Bombay) generates 2.2 million liters of sewage every day, which mostly flows unfiltered into the Arabian Sea. The World Health Organization and the World Bank therefore decided to support the city, which plans to construct a state-of-the-art sewerage system. The project comprises a 2.6-km long trenchless tunnel. Tunnelling challenges include massive and weathered basalt as well as the groundwater level along the tunnel alignment.



A Herrenknecht TBM2500XH, equipped with 21 discs, is deployed to crack the basalt. The tail seal of the TBM avoids groundwater ingress during ring installation. Water ingress through the cutting wheel of the micromachine is pumped out. The TBM launch is scheduled for July 2001. Excavation is completed after only 14 months.





 

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Alimineti Madhava Reddy Project, Andhra Pradesh

One of the largest tunnelling projects in the country is the Alimineti Madhava Reddy (AMR) project to bring water from the existing Srisailam Reservoir to the dry arid plains of the Nalgonda District of Andhra Pradesh. Central to the project is a 43.5km tunnel that is to be driven from each portal towards a mid-alignment junction by two 10m diameter double shield Robbins TBMs.



Under the largest ever single TBM order, signed in May 2006, project contractor Jaiprakash Associates Ltd, contracted Robbins to supply the two 10m diameter TBMs and all related equipment, including conveyors, spares and cutters, and teams of key personnel for the approximate five-year contract.

In March this year (2008), the project recorded a first major milestone with the cutterhead turning ceremony for the first of the two machines. Onsite assembly, rather than pre-assembly in a manufacturing facility, and as proven on previous projects, saved substantial time and money to the contract. Crews worked 24 hours a day to accomplish assembly within the aggressive four months schedule. The second Robbins machine will be assembled onsite later in 2008 and launched from the opposite end, at the inlet portal. After excavation, a drill+blast chamber will be used for removal of each TBM and back-up.

Both machines feature back-loading 20in cutters for longer cutter life through the zones of hard quartzite of up to 450 MPa in UCS, layered and separated with shale for about 50% the drive with the remainder passing through granite of 160 to 190 MPa. The double shield machines will erect a precast concrete segmental lining as they progress. The entire project is expected to take about 60 months to complete, and should be operational by December 2012.

 

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Kishanganga hydro tunnel, Jammu & Kashmir - Part of the Kishanganga hyro-electric project



The TBM is designed and dimensioned to cope with the adverse ground conditions it will encounter while boring the 14.5km long tunnel under the Himalayas. Cover above the alignment will range from 750m to 1,000m and critical geological conditions including poor and squeezing rock and several fault zones will be crossed, giving rise to the need for extensive pre-treatment grouting.



The 6.18m diameter TBM is equipped with eight AC motors of 315kW each, generating a total cutterhead power of 2520kW, and is controlled by a VFD system. Main and auxiliary thrust systems have been over-dimensioned and a high conicity of the shields is designed to cope with squeezing rock. In addition the shields are equipped with a special bentonite injection system to lubricate the shield-to-rock contact and reduce friction.



Location:

-I've marked the two terminals of the tunnel with blue circles

For the Kishanganga project, SELI is providing a complete package of tunnelling equipment including the TBM and its backup system, the muck haulage and supply line rolling stock, segment moulds for the lining, and the ventilation system. It will also second a complete crew of TBM specialists for operation of the tunnel boring system. Excavation is expected to begin in October 2010 and finish in January 2014.
 

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Sleemanabad Carrier Tunnel, Madhya Pradesh



Tunnel Type: Water Transfer
Tunnel Lengths: 12 km (7.4 mi)

Machine Type: Hybrid Earth Pressure Balance Machine (EPB TBM)
Diameter: 10.0 m (32.8 ft)

Owner: Indian Government
Contractor: M/s Patel Engineering, SEW, & Coastal Projects Limited (CPL)

Narmada Valley, located in Central India’s Madhya Pradesh state, is a drought-prone region for eight months out of every year. The Sleemanabad Carrier Canal is part of the Indian Government’s Bargi Diversion Project, which will source water from the Narmada River to irrigate 250,000 acres (100,000 hectares) of land.

The major trans-valley canal will stretch 194 km (120 mi) from the existing Bargi Dam on the Narmada River to arid areas. Once complete, the Bargi Diversion Project will transfer 152 cubic meters (40,000 gallons) of water per second to Katni, Satna, Panna, and Jabalpur districts, irrigating over 100,000 hectares (250,000 acres) of land.



TBM Launch
The hybrid EPB was completed using Onsite First Time Assembly (OFTA) in Madhya Pradesh, India on March 14, 2011. A commissioning ceremony celebrated the launch of the TBM at the 12 km (7.5 mi) long Sleemanabad Carrier Canal.



The launch ceremony also marked the first time OFTA has been used on a hybrid EPB. The Robbins-developed method allowed the TBM to be initially assembled on location, rather than in a manufacturing facility. Critical subsystems, such as the electrical and hydraulic systems, were tested before being shipped to the jobsite. For a time lapse video of the Onsite First Time Assembly at Sleemanabad, see:

Assembly Video

The tunnel will have a finished diameter of 9.2 m and is expected to be operational in 2013.
 

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Chenani - Nashri Tunnel, Jammu & Kashmir

x posting from the highways thread:
vijayvmail on Sept 4 said:
Work on India's longest road tunnel starts in Udhampur
Work on India's longest road tunnel today started with engineers blasting a portion of a hill to clear way for construction of the 9-km long Chenani- Nashri Tunnel in Jammu and Kashmir's Udhampur district.

Australian company Leighton Welston, renowned for tunnelling technology, began the project by triggering the blast this afternoon.

"We have started the work today on this prestigious project. The twin tunnels which will come on Jammu-Srinagar national highway is one of the longest road tunnel in Asia and also in India," Managing Director of Leighton Welston, Russell Waug told reporters at the project site here.

The twin tunnels will come up in a period of next five years at a cost of Rs 2,600 crore, he said, adding that it will also reduce the length of the highway as well as the travel time between Srinagar and Jammu.

The two-lane main tunnel will have a diameter of 13.3 m, while a parallel escape route shall have a diameter of 5 m. Engineers will use the NATM technique of sequential excavation and support for executing the project, he said.

The completion of the first section of the tunnel comprising of all the portal sections represents the key milestones for the project, he said.

A team of over 800 staff and 200 strong work force, armed with sophisticated drilling machines, will daily bore around 5 m of the main tunnel and 8 m of the escape route, he said.

In reply to a question about the challenges of the project, Waug said that Jammu and Kashmir has young Himalayas which keeps shifting thereby posing great challenges for tunnel construction.

He said that the tunnel would have a life span of more than 100 years and is expected to be completed before the expected deadline.

The construction team will continue to tunnel through the mountain to construct an all weather road connecting Chenani with Nashri, slashing 30-km of the journey and reducing the time travel by one hour.

"We are pleased to see this nationally important project underway. It is not only a landmark project in the history of India's transportation network but will bring increase safety and employment to local community," the MD said.

"Our focus is to complete the project on schedule and to be an integral part of the Jammu's progress and development," he said.

Source: The Economic times, dated 04-Sep-2011
World8115 said:
Thanks for posting :cheers: The company name is actually Leighton Welspun

Here is an extract from the official website:

Chenani-Nashri Tunnel
Client ILFS Transportation Networks Ltd.
Location India
Start Dec 2010
Finish Jul 2015
Value US $500 million

Leighton has been awarded a contract to construct a major road tunnel project in Northern India. The tunnel is a key component of a fundamental road improvement scheme to an arterial route, NH1A, which links the northern state to the rest of India.

The project involves construction of approximately 9km of 2-lane (13.3m dia) main tunnel along with parallel escape tunnel (5m dia) in the lower Himalayan mountain range. The tunnel is located at an elevation of 1200m with an overburden of up to 1km and will be constructed using the NATM technique of sequential excavation and support.

The tunnel and approach roads provide a 10km alternative route for 41km of the existing NH1A which passes through steep mountainous terrain and has significant geometrical, weather and safety issues. The tunnel route therefore provides an all weather route that will provide a significant time savings to motorists. It will be one of the longest road tunnels in Asia.

Leighton’s scope of work includes total responsibility for design and construction of the tunnel and its associated approaches. This includes all civil, structural, architectural, mechanical, electrical works, power distribution, ventilation, lighting, SCADA, fire control system, video surveillance, traffic control, emergency call and communications works.
IU said:
Work on India's longest road tunnel starts in Udhampur
Source: The Economic times, dated 04-Sep-2011
Some images copyright Reuters



A Trinitrotoluene (TNT), a chemical explosion used for tunnel construction, explodes during the start of the first section of Chenani-Nashri tunnel project, India's longest road tunnel at Chenani village, about 90 km (56 miles) north of Jammu September 2, 2011. The Chenani-Nashri tunnel project involves construction of about 9 km (6 miles) of two lane main tunnel (13.3m diameter) along with a parallel escape tunnel (5m diameter) to develop road connecting Chenani to Nashri village in lower Himalayan mountain range, a media release said on Friday.






 

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IU - very informative thread. I was oblivious to most of these projects!

Especially the Alimineti Madhava Reddy and Veligonda Projects in Andhra got my attention - any project that transfers water from surplus regions to drought ridden districts thereby help even India's large water distribution imbalances and increases farm output and lowest bracketed income deserve special applause!!
 

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There's another one in Rajasthan at Kota. 114 meters of a 13 km water pipeline had to be excavated using TBMs after they encountered hard rock:

Kota City Water Supply Project



Machine Type: Small Boring Unit (SBU-A) and Auger Boring Machine (ABM)
Diameter: 2 x 1.5 m (60 in)
Tunnel Type: Water Supply
Tunnel Length: 2 x 50 m (164 ft), 14 m (46 ft)
Owner: Rajasthan Government
Contractor:Vichitra Constructions Pvt. Ltd.

The 13 km (8 mi) pipeline, part of the government’s Rajasthan Urban Infrastructure Development Plan (RUIDP), was used to increase water supply and fight water contamination problems in the city. The finished system provides 24 million liters (6.3 million gallons) of water per day to about 70,000 people.

After many failed attempts, spanning the course of eight years, just three hard rock crossings remained on a vital water supply line in Kota City, Rajasthan, India. Previous contractors had attempted to excavate the crossings in hard quartzite using hand mining and HDD, which were later abandoned due to low production rates. Simply hand mining the 11 m (36 ft) long by 4.5 m (15 ft) wide launch pit took four months, at rates of 200 to 300 mm (8 to 12 in) per day. In 2008, Contractor Vichitra Constructions Pvt. Ltd. was contracted to complete the difficult 50 m (164 ft) long crossings.

After researching various technologies, Vichitra purchased a 1.5 m diameter Robbins Small Boring Unit (SBU-A) with 11.5 inch disc cutters and a Robbins 60-1270 Auger Boring Machine (ABM). The technology was supplied by Robbins Tunneling and Trenchless Technology (India) Pvt Ltd, a local subsidiary based in New Delhi who also provided the contractor with technical support, crew members, and cutter rebuild services.

 

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Ghat ki Guni Tunnel Project, Jaipur - This will help to decongest NH11 which has a steep gradient and passes through a heritage area. The tunneling work got completed in early November 2011.

Render:

-it'll actually be 2+2 and not 3+3 as shown above

Total length :- 2800 M including 858 M Twin Tube Tunnel interconnected at two locations
Project Cost :- 150.00 Crores
Agency :- Rohan Rajdeep Rajasthan Infra Projects Pvt. Ltd., Pune
Concession Period :- 13 Years 05 Months & 20 Days (Construction + Operation Period)
Expected Date of Completion of Construction :- 31st June 2012

Location (view on google maps):




Nov 5: Ghat ki Guni: JDA to start interconnecting of tunnels

JAIPUR: The Jaipur Development Authority (JDA) officials announced on Friday that they would start the work of interconnecting two tunnels at Ghat ki Guni within two weeks. The authorities recently completed the drilling work of both the 858-metre-long tunnels.

"With the completion of drilling, 50% of the work has been completed. The project is on time and will be completed within deadline," said an official. After starting major drilling, officials plan to end the project by 2013.

According to the Indian Road Congress code, the tunnel will be connected from two places after every 300 metres. The tunnel would maintain an elevated height difference of 70 metre at Agra Road and Jawahar Nagar Bypass as per the Indian Road Congress code. Also, the width of one tunnel would be around 21 metres.
Pics posted by Yagya in the Jaipur projects thread:

cc:raj arya



 

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Thanks IndiansUnite for this wonderful thread :cheers:

Some suggestion, it will be more informative if all the projects come with info like:

Project Cost
Expected Date of Completion of Construction
Machine Type
Diameter
Tunnel Type
Tunnel Length
Owner
Contractor
Map of the project.
 

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great thread IU! just want the completion date of the projects if you can get! :cheers:

from Jaypee website

Alimineti Madhva Reddy Irrigation project is the longest underground face to face tunnel in the world.
 
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