Page 39 - CO April 2017 Full Issue

Powered by COVER STORY Muck disposal: The construction of Health risk at construction site: Health Any interesting highlights or features tunnelling activity will generate about risks include accidents due to improper which distinguish this project from other 3 16,03,000 m of muck. The muck will construction practice and hazard diseases metro rail projects? be transported up to nearest proposed due to lack of sanitation facilities (i.e., water Te proposed metro in Ahmedabad has interaction option. Being the good road condition supply and human waste disposal). two corridors totaling 35.956 km and in Ahmedabad, the dust generation DPR for Ahmedabad Metro Rail Project 32 stations, including terminal stations. due to transportation of muck will be March 2015 7/19 It traverses across the city in the north- insignifcant. Impact on Sensitive Receptors: About south and east-west direction and along its Ground and Surface Water: Insignifcant 135 numbers of sensitive receptors path covers many important origins and impact will be anticipated on surface water identifedwithin 100 m on either side of destinations. for the elevated section of the Metro. For both the alignment. Te major impacts to Ahmedabad has planned for a multi- underground section, as a precautionary the sensitive receptors are due to noise and modal system, where the proposed metro measure, detailed hydrological investigation vibration. complements the existing BRTS and will be undertaken prior to the construction AMTS services. North-South Corridor of tunnel to locate the ground water aquifer Expected cost of the project and funds of Ahmedabad Metro will run parallel to falling in the alignment of metro tunnel and disbursed so far? Expected Cost of Indian Railways Meter Guage Corridor to safeguard the ground water fow wherever Project: for Approx. 8.9 km. Ahmedabad Metro feasible. Rail will be having inter change station Air Pollution: The monitoring results Cost at April with High Speed rail at Sabarmati and of pollutants such as NO2, SO2 and CO Description 2014 price level Ahmedabad Railway station. are much below the national standards (`in crore) (NAAQS, CPCB) and dust concentrations Land 705.84 What are the challenges specifc to this monitored are 1.3 – 2.2 times higher than Alignment & metro project? the standard value. Hence, dust could be Formation 1593.76 The key challenge being faced by this the problem when the project is under Station Building 1745.65 metro project is two-fold. Te frst is the construction. acquisition of private land. Ahmedabad Noise Pollution: The major sources of Depot 318.62 Metro Rail Project is being constructed in noise pollution during construction are P-Way 369.78 limited ROW. It is passing through thickly movement of vehicles for transportation of Traction & N Power populated areas of Ahmedabad such as in construction material and the construction Supply 436.54 the east, near Amraiwadi and Vastral, and machinery/equipment at the construction in the walled city. Te project has to be in site. Te construction activities are expected S&T works 960.01 a way to ensure that the minimum amount to produce noise levels in the range of 104 R &R hutments 125.78 of land needs to be acquired. Tis in itself - 109 dB (A) at source which decreases Misc. 260.38 is a difcult task as strict design guidelines with increase in distance. Exposure to need to be followed for the safety and noise may lead to complete hearing loss, Rolling Stock 905.54 operational feasibility of the train. Even tension, fatigue, fast pulse/ respiration rates, Security 11.12 afer the designing, however, it is a very long dizziness & loss of balance, anger, irritation Staff quarter for and difcult process to go to the feld and and in extreme case nervousness. O&M 49.64 acquire the land from private land owners. Impact due to Vibration: Directorate Capital Expenditure Each individual’s needs and priorities General of Mines and Safety (DGMS) on Multi Modal 67.98 are different, which the company needs prescribed permissible limit of ground Traffic to respect. The financial and emotional vibration (INDIA). Te permissible limit attachments that people have to their of ground vibration considered here at General Charges @ 342.24 property are also very strong, which makes frequency 8-25 Hz for 5% (Except Land) most people unwilling to contribute their • Domestic houses/structures–10 mm/s Contingency @ 3% 215.61 land to the project. Even afer the land has • Objects of historical importance & Total 8129.00 been acquired, the company needs to take sensitive structures – 5 mm/s steps to ensure that the people who have As per the results of vibration study, the Total Taxes & Duties 1197.31 been displaced are able to meet the living archaeological structures are at safe distance Total 9326.31 standards that they had before. Tis is one and the there would be no vibration impact Escalation Cost @ of the major challenges being faced by this on these structures due to TBM tunneling. 7.5% per annum up 1348.69 project. However, the predicted vertical vibration to project completion The second challenge was that the above tunnel is reaches 5 mm/s which underground section is passing through can damage the structures. Precautionary IDC 98.00 old city having ASI monuments near metro measures needs to be taken during Total Completion 10773 alignment. As per the AMASR Act, 2010, it construction. cost is not permitted to construct any structures aPrIL 2017 |construction opportunities 41