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Izumi C.,Oriental Consultants Company Ltd | Akutagawa S.,Kobe University | Tyagi J.,Delhi Metro Rail Corporation. | Abe R.,Oriental Consultants Company Ltd | Ravi Sekhar C.,CSIR - Central Electrochemical Research Institute
Tunnelling and Underground Space Technology | Year: 2014

Despite of the advancement of monitoring devices at construction sites and the rapid progress of data management and IT, accidents in construction are still threatening not only site workers but also the public. It is difficult to cover all the dangerous areas on a construction site with expensive devices. To overcome these problems, a new monitoring method, called On Site Visualization (OSV, for short), has been developed. Unlike a conventional method of data acquisition, the use of light emitting sensors to execute monitoring by OSV enables real-time data processing and visualization on-site, so that the state of deformation, strain, inclination and etc. of concern is grasped with no delay in time and is shown visually to anyone nearby. Rational use of the new scheme based on the OSV offers a new stage whereby visually shared real-time information about the structures of concern could lead to a new paradigm of field measurement and a safer working environment. This paper describes the application example of the OSV monitoring system in the open cut excavation site of Delhi Metro in New Delhi, India. In the evaluation of the project, the role and effectiveness of OSV as a part of safety management were confirmed through a questionnaire survey given to the workers and public citizens. © 2014 Elsevier Ltd.


Malik S.,Delhi Metro Rail Corporation. | Agrawal P.K.,Race Course Station of Delhi Metro | Billore U.,DMRC
Indian Concrete Journal | Year: 2010

Tunnelling using Tunnel Boring Machines (TBM) is a huge investment in itself, but is often adopted for safe and speedy construction. However, when unforeseen and unfavourable conditions are encountered, it becomes important to compare other available tunnelling methods also. In this case a tough rock was encountered in front of the TBM and an analysis of various available alternatives was made to fnd a solution to progress with tunnelling.


Tewatia S.K.,Central Soil and Materials Research Station | Sridharan A.,Indian Institute of Science | Singh M.,Delhi Metro Rail Corporation.
Geotechnical and Geological Engineering | Year: 2012

Degree of consolidation, U, is defined in two ways: (1) by settlement analysis and (2) by dissipation of pore pressure. Equations of vertical and radial consolidations are derived by equating the above two U. The new equations are compared with the existing equations of vertical and radial consolidations. It is shown that new equation of radial consolidation is exactly same as Barron's equation of equal strain radial consolidation while in case of vertical consolidation it is similar to later part of Terzaghi's equation of vertical consolidation. A few possible reasons and advantages of comparison are given. The theory of rapid loading methods is based on the equality of these two degrees of consolidations. It is concluded that in rapid loading methods the next load increment can be applied at any time in radial consolidation once the effects of initial compression are over. However, in vertical consolidation it can be applied only after 60% consolidation. © 2011 Springer Science+Business Media B.V.


News Article | December 22, 2015
Site: cleantechnica.com

The Delhi Metro Rail Corporation is making progress towards its goal to go 100% solar as far as power procurement is concerned. The Delhi Metro Rail Corporation (DMRC) has signed an agreement with the Solar Energy Corporation of India (SECI) to source electricity from solar power projects. The DMRC is looking to ensure low-cost, escalation-free electricity for a period of several years to ensure financial and operational efficiency. The DMRC intends to source around 1,000 million kWh of electricity from ground-mounted solar power projects every year. A solar PV project of around 600 MW capacity will be able to deliver that much power. A project of 500 MW capacity has been planned to be commissioned over the next 3 years. As Delhi neither has the land nor high solar radiation, the project may well come up somewhere in the nearby states like Uttar Pradesh or, more likely, Rajasthan. The SECI will facilitate the entire process of tendering and finalizing the developer(s). The DMRC shall then sign a power purchase agreement with the project developer. The DMRC currently buys power from a number of utilities in Delhi and has to pay very high tariffs. As frequent hikes in fare may cause political storms in the national capital, the annual increase in electricity tariffs dents DMRC’s profitability. The Corporation has already gone solar by setting up several rooftop solar power projects at its stations. This program is expected to be expanded to more stations over the coming months. However, the rail network of DMRC is set to expand at a much faster rate compared to the planned solar power capacity addition. A new line, the largest so far, is expected to be operational over the next few months while the DMRC plans to expand further into the neighboring states of Uttar Pradesh and Haryana over the next few years.   Get CleanTechnica’s 1st (completely free) electric car report → “Electric Cars: What Early Adopters & First Followers Want.”   Come attend CleanTechnica’s 1st “Cleantech Revolution Tour” event → in Berlin, Germany, April 9–10.   Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter.  


News Article | March 24, 2016
Site: cleantechnica.com

In what is probably the first tender floated for an ultra mega solar power project in India, central and state agencies have invited bids to set up 750 MW of solar power capacity in the state of Madhya Pradesh. The 750 MW solar power park will be one of the biggest in India once fully operational. The project is among the first ultra mega solar power projects approved by the central government under its revised solar power target of 100 GW by March 2022. The solar power park will be developed in 3 phases of 250 MW capacity each, spread over a total of 1,500 hectares. The Delhi Metro Rail Corporation will sign a power purchase agreement, likely for 150 MW, while the remainder capacity will be procured by the state utility. Power generation from the first phase is expected to start beginning in June 2017, with the entire capacity expected to be fully operational by December 2017. Earlier this year, the International Finance Corporation (IFC) signed an agreement with the government of the state of Madhya Pradesh in India to provide assistance in the implementation of the solar power park. The IFC will extend its global expertise to structure and implement the transaction to help attract private investments of about $750 million. IFC’s work on this project will be supported by its partnership with Australia’s Department of Foreign Trade. The government of Madhya Pradesh has already approved the project, following which the process of land acquisition was initiated. The project is expected to require a total investment of about $500-600 million as per the current capital cost requirements. Reprinted with permission.    Get CleanTechnica’s 1st (completely free) electric car report → “Electric Cars: What Early Adopters & First Followers Want.”   Come attend CleanTechnica’s 1st “Cleantech Revolution Tour” event → in Berlin, Germany, April 9–10.   Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter.  

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