´Make in Metro´
Real Estate

´Make in Metro´

With metro lines of about 528 km expected to be operational in India soon and considering the support these can lend to India´s future smart cities, CW takes a look at trends and factors to help execute these projects successfully.

One of the major elements of India´s 100 smart cities will be mobility, making an MRTS project like the Metro a key component. Abhay Kumar Mishra, CEO, Mumbai Metro One Pvt Ltd, affirms, ¨Metros are the most technologically advanced urban transport solution.¨ Modern, safe, green and reliable, the Metro, as VB Gadgil, Chief Executive and Managing Director, L&T Metro Rail (Hyderabad) Ltd, says, will be ideal for planned new cities with transportation as their backbone in the presence of futuristic planning. Sunil Srivastava, Managing Director, BARSYL, also agrees on the relevance of Metro, adding, ¨The government is encouraging every city to plan at least one Metro, and the Ministry of Urban Development is willing to partly fund the study for every city. The result: Smaller towns are stepping forward and towns including Agra, Meerut, and Varanasi are planning a Metro.

The current status
In fact, the Central Government, as reported, is considering Metro networks in nine cities covering 223 km at a cost of Rs 83,000 crore. Of the 259 km of metro line in India, 189 km is in Delhi and 60 km in four other cities. While Bengaluru, Mumbai, Chennai and Nagpur are witnessing works going on, projects in Pune, Ahmedabad, Lucknow, Visakhapatnam and Vijayawada are reported to be taken up. Union Urban Development Minister Venkaiah Naidu confirms, ¨The Government is keen to cover major cities in the country, and hence, Mumbai, Delhi and Kolkata need to be given all the encouragement. Pune is also on our priority list; once we get the proposals for Metro, we will consider it.¨ If all this fructifies, metro lines worth around Rs 164,915 crore of about 528 km should be operational in India soon. (See table on page 62 for status on Metro projects) While the construction phase of Mumbai Metro Line-I is over and the project commenced commercial operations from June 2014, Line-III is on the anvil. Also, last month, the Jaipur Metro Phase-1B, among the fastest implemented metro projects in the country, was opened to passengers (turn to page 66 for complete construction details). Currently, the Lucknow and Noida Metros are in the bidding phase and new bids shall be announced for Ahmedabad, Nagpur and expansions of Bengaluru, Mumbai and Delhi.

In the Hyderabad Metro Rail Project, Stage-I is under trial run following the speed certificate received from RDSO. Stage-II is under aggressive construction mode and static and dynamic testing of trains under progress is underway both in the depot and on land. Stage-III, IV, V and VI are under active construction mode. ¨While all major purchases are all already completed, tenders may get floated for transit-oriented development (TOD) for architectural planning, engineering, construction of TOD, major MEP and vertical transport systems. This will happen based on the launch of each project,¨ says Gadgil.

Construction:
Underground vs elevated
Metros are being constructed in two modes: Elevated and/or underground. Although the underground system requires no road space for the train duct (tunnel), substantial space is required at the stations for planning entry and exit for commuters and ventilation shafts. The elevated corridor requires about 2-3 m width of road (normally the existing median width) for construction of the viaduct and further additional land or right of way to undertake construction work and mobilise construction equipment.

For his part, Mishra recommends the elevated mode. ¨The capital cost for an underground system is nearly three times compared to an elevated system,¨ he reasons. ¨Hence, for a developing economy like India, elevated is recommended.¨ If finance is in place, though, Srivastava´s choice is underground. ¨A major benefit of the underground Metro is that it does not spoil the city´s architecture. But if the funds are not in place, stakeholders need to arrive at the most viable option.¨

Vendors step in The Urban Development Ministry has mandated all state governments to implement the Metro and monorail in all A-class cities and subsequently smaller cities. It is planning to increase freight transportation, achieve a quantum jump in rolling stock acquisition, introduce high-speed passenger trains, create dedicated freight corridors, improve safety systems and standards, adopt new technology in the field of rolling stock, signalling and telecommunication, undertake green initiatives, and accelerate network expansion. In the case of equipment, the Metro requires specialised tyre-mounted piling rigs, piling hammers, tyre-mounted heavy cranes, breakers, excavators, multi-axle hydraulic trailers and gantry cranes. Siepmann's Card Systems Pvt Ltd is among the pioneers in the automatic fare collection (AFC) segment. Managing Director P Ravindranath Bhas says, ¨We supply contactless smart cards for regular travellers and smart tokens for single journey. We use highly sophisticated machinery to make the smart card such as circuits through ultrasonic embedding process.¨ Bombardier is Delhi Metro´s largest contractor as far as signalling and train control solutions are concerned with over 120 km of line in operation or in progress for Delhi Metro´s Line-V, VI and VII. The company has received orders around $1 billion from Delhi Metro combining rolling stock delivering 614 metro cars and signalling solutions. Harsh Dhingra, Chief Country Representative, India, Bombardier Transportation, says, ¨The modern, high-capacity Bombardier Movia metro vehicles integrate some of the world's most advanced mobility technologies such as the Bombardier Mitrac propulsion and control system and the Bombardier Flexx Metro 3000 bogies, an extremely robust and reliable design. Our versatile portfolio of fully automated driverless technologies ensures effective urban flow, combining performance and flexibility with highly efficient passenger capacity, energy consumption and land use.¨

Faiveley Transport Rail Technologies has been manufacturing all brake and HVAC systems, pantograph and platform screen doors for the Metros. Executive Director Dhakshayani Kumar says, ¨The platform screen door acts as a barricade for safety and helps the air-conditioning system retain air within the platform areas. We have also started offering a door line system, a reinforced special fibre structure that avoids metallic corrosion between the door link and has more sound barricades.

Speed is the limit
Typically, Metros in the country are designed for a speed for 80 kmph. However, the actual operating speed is about 30 kmph, largely owing to the inter-station distances of about 1 km. High-speed metros typically have longer inter-station distances of 3 km to ensure average speed of 80 kmph and are designed for an operating speed of around 120 kmph. But is India geared for high-speed metros? And is it a requirement at all?

¨It provides connectivity between the airport and important business hubs with the main city,¨ responds Mishra. And Gadgil adds, ¨Metro cities with satellite townships around them will require a high-speed metro rail system to reduce commuting time.¨ However, Srivastava does not see the need for high-speed metros. ¨The country has still not got into the level of offering a good metro system and that should be the focus area,¨ he says. Mishra agrees that with only Delhi having ¨a good metro network¨, it will take considerable time to mature and provide high-speed metros.

Capital-intensive
Metro projects are capital-intensive and require large investments. Interest rates in India are to the tune of 11-13 per cent, which increases the overall project implementation costs. While foreign funding is provided to government-funded projects (DMRC, BMRC), Mishra urges that ¨similar facilities should be extended to private players with appropriate monitoring mechanisms in place.¨ In the long run, this will reduce operating costs and user fees. Meanwhile, Gadgil suggests that the civil infrastructure including viaduct could be done by the government agencies and experienced private companies could be invited to install and run rail systems. This would mitigate risk and drastically reduce funding requirements.On a positive note, Srivastava says that countries like Germany, Canada and France have shown interest in funding some of these projects. ¨The government can achieve a realistic viability gap analysis for these projects to know how much is actually needed,¨ he adds. ¨A detailed traffic study or detailed revenue analysis will help determine the exact cost for a project.¨

Overcoming challenges
As for other current challenges in project execution (See box on Metro Challenges), here are Gadgil´s recommendations:

  • Finalise proper model of execution considering the challenges envisaged in the concession agreement; risk identification and mitigation are essential to make PPP projects work as a partnership.
  • Make statutory approvals system-based to avoid undue delays.
  • Standardise and unify technical specifications.
  • Coordinate approvals from different agencies at Central and state levels for speedier and economical execution.
  • Base construction safety standards on the National Code for Safety; for passenger and asset safety during operation and maintenance, perhaps use British Rail´s Yellow Book (See box on Safety First!)

For his part, Mishra offers measures to reduce delays and increase in construction cost:

  • Complete land acquisition before construction starts.
  • Complete shifting of utilities in a time-bound manner; make it the responsibility of the project implementation agency.
  • Estimate project costs in DPR in line with project appraisal for any private company; make all soft costs part of project cost estimation.
  • Government project implementation agencies to coordinate and resolve issues arising from other government agencies.
  • Single window for all clearances and approvals.
  • Make cheap loans (say around 1 per cent) available to metro development companies irrespective of ownership (government or private sector).

While having a Metro in one´s city has become as much fashion statement as transportation necessity, Srivastava concludes, ¨Rather than planning 25 projects at a time, the government should focus on five critical projects, complete them and then move forward. So in every two to three years, there will be a new Metro coming up.¨

  • Metro networks in nine cities covering 223 km at .Rs83,000 crore under consideration.

  • MoUD mandate:
    All state governments to implement Metro and monorail projects in all A-class cities.

  • Designed for 80 kmph, actual operating speed of metros in India is 30 kmph.

SAFETY FIRST!
Activity-wise construction work procedures include:

  • Hazard identification and risk assessment.
  • Environmental aspect-impact analysis.
  • Risk control plan.
  • Mandatory safety requirements.
  • Inspection plan.
  • Test plan.
  • Contingency plan.
  • Incident communication flow chart.

Source: L&T Metro Rail (Hyderabad) Ltd

Metro Rail Projects across India

COMPLETED:
Delhi Metro Phase-I
  • At .Rs10,571 crore
  • Since 2006

Delhi Metro Phase-II

  • At Rs.19,131 crore
  • Since 2011

Mumbai Metro Line-I

  • At Rs.2,356 crore
  • Since 2015

Jaipur Metro Stage-I

  • At appx Rs.2000 crore
  • Since 2015

Chennai Metro Phase-I

  • At Rs.18,379 crore
  • Since 2015

UPCOMING PROJECTS

Delhi Metro Phase-III

  • At Rs.35,242 crore
  • Over 40 per cent completed

Mumbai Metro Line-III

  • At .Rs23,136 crore
  • Completion date unknown

Bengaluru Metro Phase-I

  • At .Rs11,609 crore
  • Estimated completion year: 2015

Hyderabad Metro

  • At .Rs14,132 crore
  • Estimated completion year: 2017

Kolkata East-West Corridor

  • At .Rs4,874 crore
  • Estimated completion year: 2015-16

Kochi Metro Rail

  • At .Rs5,601 crore
  • Estimated completion year: Four years from start of work

APPROVED BY CABINET

Ahmadabad Metro Rail

  • At .Rs10,773 crore
  • Estimated completion year: 2018

Nagpur Metro Rail

  • At .Rs8,680 crore
  • Estimated completion year: 2018

APPROVED ´IN PRINCIPLE´

Pune Metro Rail

  • At .Rs11,802 crore

Lucknow Metro Rail

  • At .Rs6,928 crore

Source: Industry

Metro Challenges
VB Gadgil, Chief Executive & Managing Director, L&T Metro Rail (Hyderabad) Ltd, on the current challenges involved in the construction of metro projects:

PRE-CONSTRUCTION

  • No readily available plans for underground utilities.
  • Government machinery involvement is key.

DEALING WITH RAILWAYS OR DEFENCE

  • Long-drawn process of approval.

LAND

  • Private acquisition difficult.
  • Social considerations need to be factored.
  • Risk for concessionaire if construction commences before availability of complete land parcel.
  • ROW (right of way).
  • Requirement of continuous ROW.
  • ROW of desired width not available in congested cities.

ALIGNMENT FINALISATION

  • Limitation on sharp curve < 130.
  • Building demolitions take time.

DESIGN

  • Design reworks owing to uncertain ground features.
  • Lack of standardisation in Metro sector.
  • Limited design experts.

SYSTEM INTEGRATION

Involves complex system integration for fully functional operational system.

TRAFFIC MANGEMENT

Limited ROW.

FINANCIAL CHALLENGES
  • Volatile financial market.
  • Interest during construction.
  • Foreign exchange exposure.
  • Cost risk or cost overrun risk.

OPERATION AND MAINTENANCE RISK

¨TBM and related equipment is less than 8-10 per cent of project cost.¨

Designed to suit project-specific geological and hydrological conditions, Herrenknecht TBMs can achieve monthly advance rates far in excess of 300 m. Manoj Garg, Managing Director, Herrenknecht, elaborates.

Size: Currently, so-called single track twin-tube systems are under construction in India, i.e. there is a separate tunnel for either direction of travel. The inside diameter is typically 5,800 mm with the tunnel walls made of precast concrete elements with a thickness of 275 mm. A machine to suit these dimensions has a typical shield diameter of 6,600 mm.

TBM features: Tunnel construction with TBM is faster and less disruptive. Also, TBM tunnelling is much more environment-friendly compared to the cut-and-cover method, has a minimum impact on geology and water tables, uses no explosives, keeps dust and air pollution to a minimum, and minimally disrupts traffic flows.

Adding to project cost: TBM and related equipment is less than 8-10 per cent of project cost. Subject to proper maintenance, Herrenknecht TBMs can last for decades and be reused on projects with matching parameters, further reducing cost.

Training and after-sales services: Right from assembly erection of the first 200 m of tunnel and final acceptance, our engineers operate and maintain the TBM and related equipment. After-sales services are provided 24/7 by a pool of Indian and expatriate TBM experts stationed in New Delhi and Chennai.

With metro lines of about 528 km expected to be operational in India soon and considering the support these can lend to India´s future smart cities, CW takes a look at trends and factors to help execute these projects successfully. One of the major elements of India´s 100 smart cities will be mobility, making an MRTS project like the Metro a key component. Abhay Kumar Mishra, CEO, Mumbai Metro One Pvt Ltd, affirms, ¨Metros are the most technologically advanced urban transport solution.¨ Modern, safe, green and reliable, the Metro, as VB Gadgil, Chief Executive and Managing Director, L&T Metro Rail (Hyderabad) Ltd, says, will be ideal for planned new cities with transportation as their backbone in the presence of futuristic planning. Sunil Srivastava, Managing Director, BARSYL, also agrees on the relevance of Metro, adding, ¨The government is encouraging every city to plan at least one Metro, and the Ministry of Urban Development is willing to partly fund the study for every city. The result: Smaller towns are stepping forward and towns including Agra, Meerut, and Varanasi are planning a Metro. The current status In fact, the Central Government, as reported, is considering Metro networks in nine cities covering 223 km at a cost of Rs 83,000 crore. Of the 259 km of metro line in India, 189 km is in Delhi and 60 km in four other cities. While Bengaluru, Mumbai, Chennai and Nagpur are witnessing works going on, projects in Pune, Ahmedabad, Lucknow, Visakhapatnam and Vijayawada are reported to be taken up. Union Urban Development Minister Venkaiah Naidu confirms, ¨The Government is keen to cover major cities in the country, and hence, Mumbai, Delhi and Kolkata need to be given all the encouragement. Pune is also on our priority list; once we get the proposals for Metro, we will consider it.¨ If all this fructifies, metro lines worth around Rs 164,915 crore of about 528 km should be operational in India soon. (See table on page 62 for status on Metro projects) While the construction phase of Mumbai Metro Line-I is over and the project commenced commercial operations from June 2014, Line-III is on the anvil. Also, last month, the Jaipur Metro Phase-1B, among the fastest implemented metro projects in the country, was opened to passengers (turn to page 66 for complete construction details). Currently, the Lucknow and Noida Metros are in the bidding phase and new bids shall be announced for Ahmedabad, Nagpur and expansions of Bengaluru, Mumbai and Delhi. In the Hyderabad Metro Rail Project, Stage-I is under trial run following the speed certificate received from RDSO. Stage-II is under aggressive construction mode and static and dynamic testing of trains under progress is underway both in the depot and on land. Stage-III, IV, V and VI are under active construction mode. ¨While all major purchases are all already completed, tenders may get floated for transit-oriented development (TOD) for architectural planning, engineering, construction of TOD, major MEP and vertical transport systems. This will happen based on the launch of each project,¨ says Gadgil. Construction: Underground vs elevated Metros are being constructed in two modes: Elevated and/or underground. Although the underground system requires no road space for the train duct (tunnel), substantial space is required at the stations for planning entry and exit for commuters and ventilation shafts. The elevated corridor requires about 2-3 m width of road (normally the existing median width) for construction of the viaduct and further additional land or right of way to undertake construction work and mobilise construction equipment. For his part, Mishra recommends the elevated mode. ¨The capital cost for an underground system is nearly three times compared to an elevated system,¨ he reasons. ¨Hence, for a developing economy like India, elevated is recommended.¨ If finance is in place, though, Srivastava´s choice is underground. ¨A major benefit of the underground Metro is that it does not spoil the city´s architecture. But if the funds are not in place, stakeholders need to arrive at the most viable option.¨ Vendors step in The Urban Development Ministry has mandated all state governments to implement the Metro and monorail in all A-class cities and subsequently smaller cities. It is planning to increase freight transportation, achieve a quantum jump in rolling stock acquisition, introduce high-speed passenger trains, create dedicated freight corridors, improve safety systems and standards, adopt new technology in the field of rolling stock, signalling and telecommunication, undertake green initiatives, and accelerate network expansion. In the case of equipment, the Metro requires specialised tyre-mounted piling rigs, piling hammers, tyre-mounted heavy cranes, breakers, excavators, multi-axle hydraulic trailers and gantry cranes. Siepmann's Card Systems Pvt Ltd is among the pioneers in the automatic fare collection (AFC) segment. Managing Director P Ravindranath Bhas says, ¨We supply contactless smart cards for regular travellers and smart tokens for single journey. We use highly sophisticated machinery to make the smart card such as circuits through ultrasonic embedding process.¨ Bombardier is Delhi Metro´s largest contractor as far as signalling and train control solutions are concerned with over 120 km of line in operation or in progress for Delhi Metro´s Line-V, VI and VII. The company has received orders around $1 billion from Delhi Metro combining rolling stock delivering 614 metro cars and signalling solutions. Harsh Dhingra, Chief Country Representative, India, Bombardier Transportation, says, ¨The modern, high-capacity Bombardier Movia metro vehicles integrate some of the world's most advanced mobility technologies such as the Bombardier Mitrac propulsion and control system and the Bombardier Flexx Metro 3000 bogies, an extremely robust and reliable design. Our versatile portfolio of fully automated driverless technologies ensures effective urban flow, combining performance and flexibility with highly efficient passenger capacity, energy consumption and land use.¨ Faiveley Transport Rail Technologies has been manufacturing all brake and HVAC systems, pantograph and platform screen doors for the Metros. Executive Director Dhakshayani Kumar says, ¨The platform screen door acts as a barricade for safety and helps the air-conditioning system retain air within the platform areas. We have also started offering a door line system, a reinforced special fibre structure that avoids metallic corrosion between the door link and has more sound barricades. Speed is the limit Typically, Metros in the country are designed for a speed for 80 kmph. However, the actual operating speed is about 30 kmph, largely owing to the inter-station distances of about 1 km. High-speed metros typically have longer inter-station distances of 3 km to ensure average speed of 80 kmph and are designed for an operating speed of around 120 kmph. But is India geared for high-speed metros? And is it a requirement at all? ¨It provides connectivity between the airport and important business hubs with the main city,¨ responds Mishra. And Gadgil adds, ¨Metro cities with satellite townships around them will require a high-speed metro rail system to reduce commuting time.¨ However, Srivastava does not see the need for high-speed metros. ¨The country has still not got into the level of offering a good metro system and that should be the focus area,¨ he says. Mishra agrees that with only Delhi having ¨a good metro network¨, it will take considerable time to mature and provide high-speed metros. Capital-intensive Metro projects are capital-intensive and require large investments. Interest rates in India are to the tune of 11-13 per cent, which increases the overall project implementation costs. While foreign funding is provided to government-funded projects (DMRC, BMRC), Mishra urges that ¨similar facilities should be extended to private players with appropriate monitoring mechanisms in place.¨ In the long run, this will reduce operating costs and user fees. Meanwhile, Gadgil suggests that the civil infrastructure including viaduct could be done by the government agencies and experienced private companies could be invited to install and run rail systems. This would mitigate risk and drastically reduce funding requirements.On a positive note, Srivastava says that countries like Germany, Canada and France have shown interest in funding some of these projects. ¨The government can achieve a realistic viability gap analysis for these projects to know how much is actually needed,¨ he adds. ¨A detailed traffic study or detailed revenue analysis will help determine the exact cost for a project.¨ Overcoming challenges As for other current challenges in project execution (See box on Metro Challenges), here are Gadgil´s recommendations: Finalise proper model of execution considering the challenges envisaged in the concession agreement; risk identification and mitigation are essential to make PPP projects work as a partnership. Make statutory approvals system-based to avoid undue delays. Standardise and unify technical specifications. Coordinate approvals from different agencies at Central and state levels for speedier and economical execution. Base construction safety standards on the National Code for Safety; for passenger and asset safety during operation and maintenance, perhaps use British Rail´s Yellow Book (See box on Safety First!) For his part, Mishra offers measures to reduce delays and increase in construction cost: Complete land acquisition before construction starts. Complete shifting of utilities in a time-bound manner; make it the responsibility of the project implementation agency. Estimate project costs in DPR in line with project appraisal for any private company; make all soft costs part of project cost estimation. Government project implementation agencies to coordinate and resolve issues arising from other government agencies. Single window for all clearances and approvals. Make cheap loans (say around 1 per cent) available to metro development companies irrespective of ownership (government or private sector). While having a Metro in one´s city has become as much fashion statement as transportation necessity, Srivastava concludes, ¨Rather than planning 25 projects at a time, the government should focus on five critical projects, complete them and then move forward. So in every two to three years, there will be a new Metro coming up.¨ Metro networks in nine cities covering 223 km at .Rs83,000 crore under consideration. MoUD mandate: All state governments to implement Metro and monorail projects in all A-class cities. Designed for 80 kmph, actual operating speed of metros in India is 30 kmph. SAFETY FIRST! Activity-wise construction work procedures include: Hazard identification and risk assessment. Environmental aspect-impact analysis. Risk control plan. Mandatory safety requirements. Inspection plan. Test plan. Contingency plan. Incident communication flow chart. Source: L&T Metro Rail (Hyderabad) Ltd Metro Rail Projects across IndiaCOMPLETED: Delhi Metro Phase-I At .Rs10,571 crore Since 2006 Delhi Metro Phase-II At Rs.19,131 crore Since 2011 Mumbai Metro Line-I At Rs.2,356 crore Since 2015 Jaipur Metro Stage-I At appx Rs.2000 crore Since 2015 Chennai Metro Phase-I At Rs.18,379 crore Since 2015 UPCOMING PROJECTS Delhi Metro Phase-III At Rs.35,242 crore Over 40 per cent completed Mumbai Metro Line-III At .Rs23,136 crore Completion date unknown Bengaluru Metro Phase-I At .Rs11,609 crore Estimated completion year: 2015 Hyderabad Metro At .Rs14,132 crore Estimated completion year: 2017 Kolkata East-West Corridor At .Rs4,874 crore Estimated completion year: 2015-16 Kochi Metro Rail At .Rs5,601 crore Estimated completion year: Four years from start of work APPROVED BY CABINET Ahmadabad Metro Rail At .Rs10,773 crore Estimated completion year: 2018 Nagpur Metro Rail At .Rs8,680 crore Estimated completion year: 2018 APPROVED ´IN PRINCIPLE´ Pune Metro Rail At .Rs11,802 crore Lucknow Metro Rail At .Rs6,928 crore Source: Industry Metro Challenges VB Gadgil, Chief Executive & Managing Director, L&T Metro Rail (Hyderabad) Ltd, on the current challenges involved in the construction of metro projects: PRE-CONSTRUCTION No readily available plans for underground utilities. Government machinery involvement is key. DEALING WITH RAILWAYS OR DEFENCE Long-drawn process of approval. LAND Private acquisition difficult. Social considerations need to be factored. Risk for concessionaire if construction commences before availability of complete land parcel. ROW (right of way). Requirement of continuous ROW. ROW of desired width not available in congested cities. ALIGNMENT FINALISATION Limitation on sharp curve < 130. Building demolitions take time. DESIGN Design reworks owing to uncertain ground features. Lack of standardisation in Metro sector. Limited design experts. SYSTEM INTEGRATIONInvolves complex system integration for fully functional operational system. TRAFFIC MANGEMENT Limited ROW. FINANCIAL CHALLENGES Volatile financial market. Interest during construction. Foreign exchange exposure. Cost risk or cost overrun risk. OPERATION AND MAINTENANCE RISK ¨TBM and related equipment is less than 8-10 per cent of project cost.¨ Designed to suit project-specific geological and hydrological conditions, Herrenknecht TBMs can achieve monthly advance rates far in excess of 300 m. Manoj Garg, Managing Director, Herrenknecht, elaborates. Size: Currently, so-called single track twin-tube systems are under construction in India, i.e. there is a separate tunnel for either direction of travel. The inside diameter is typically 5,800 mm with the tunnel walls made of precast concrete elements with a thickness of 275 mm. A machine to suit these dimensions has a typical shield diameter of 6,600 mm. TBM features: Tunnel construction with TBM is faster and less disruptive. Also, TBM tunnelling is much more environment-friendly compared to the cut-and-cover method, has a minimum impact on geology and water tables, uses no explosives, keeps dust and air pollution to a minimum, and minimally disrupts traffic flows. Adding to project cost: TBM and related equipment is less than 8-10 per cent of project cost. Subject to proper maintenance, Herrenknecht TBMs can last for decades and be reused on projects with matching parameters, further reducing cost. Training and after-sales services: Right from assembly erection of the first 200 m of tunnel and final acceptance, our engineers operate and maintain the TBM and related equipment. After-sales services are provided 24/7 by a pool of Indian and expatriate TBM experts stationed in New Delhi and Chennai.

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