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Delhi Metro achieves another first

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Source : The Hindu Date : 18.06.2009

Delhi Metro achieves another first

Staff Reporter

Uses new technology in tunnelling work on ‘soft’ soil

Photo: V. V. Krishnan

Inside the tunnel: Delhi Metro Rail Corporation workers and engineers after the final breakthrough of tunnelling on its Qutub Minar-Saket stretch in New Delhi on Wednesday.

NEW DELHI: The Delhi Metro Rail Corporation on Wednesday achieved the final breakthrough in tunnelling work on the Qutub Minar-Saket stretch using the New Austrian Tunnelling Method (NATM) on Phase II of its upcoming new Central Secretariat-Gurgaon line.

This is the first time that the new technology has been used on “soft” soil.

According to a senior DMRC official, so far NATM was used in hard rock conditions at the Chawri Bazar station and the Ridge area near Talkatora Garden.

NATM is a technology that is used for tunnelling in rocky areas. The surface is first broken with the help of controlled blasting, the pieces are then removed using machinery, and then concrete lining is done.

“Tunnel construction in soft soil is very tricky as the soil has to be immediately cemented and strengthened to prevent collapse. The Tunnel Boring Machine (TBM) was not used here as the distance was small and lowering the TBM near the Archaeological Survey of India-protected monument could have been difficult and very expensive,” said the DMRC official.

The 185-metre NATM tunnel breakthrough achieved at the South end of the Saket metro railway station is a part of the 1.85-km Qutub Minar-Saket stretch which also covers a cut-and-cover underground tunnel of 1,020 metres and 645 metres elevated section.

Work in this area was difficult as DMRC had to divert an old 247-metre-long, six-metre-wide and five-metre-deep natural storm-water drain which was flowing over the alignment of the NATM tunnel. “All precautions prescribed by the Archaeological Survey of India had to be observed as construction activity was done close to Petheora Rai Ka Kila, a historic monument situated in the vicinity of the Saket metro station,” the official said.

Last Updated on Thursday, 18 June 2009 13:03
 

Drive against water-borne diseases

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Source : The Hindu Date : 18.06.2009

Drive against water-borne diseases

A Correspondent

KATTAPPANA: The Health Department in association with the Thodupuzha Municipality on Wednesday launched a special drive to prevent the outbreak of water-borne diseases.

The first stage of the project would focus on prevention of water-borne diseases and in the second stage it will focus on lifestyle diseases and palliative care, said an official of the Health Department. The programme has been launched after malaria and dengue fever cases were detected in the district. The municipality has earmarked Rs. 6 lakh for the project. Health workers distributed leaflets to the public and have started collecting details of labourers employed from outside the State.

Of the total 18 cases of malaria found in the district, only one case at Karimannur, near Thodupuzha, was detected to be caused by local factors, the official said.

The official said that additional health workers had been appointed at the taluk hospital at Thodupuzha to help in the sanitation drive in the municipal areas.

Chlorination

This includes chlorination of water supply in public places, supply of guppy fishes which eat the larvae of mosquitoes, observance of ‘dry day’ on campuses with the participation of the students and collecting the details of unused and filthy water sources.

Last Updated on Saturday, 20 June 2009 14:06
 

KUIDFC yet to lay 120 km of drainage lines

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Source : The Hindu Date : 18.06.2009

KUIDFC yet to lay 120 km of drainage lines

Staff Correspondent

The work will be completed by March 2010: Superintending Engineer

 


Water supply line with 18 MGD capacity from Thumbe vented dam to Padil commissioned

Cost of work under KUDCEMP has increased from Rs. 306 crore to Rs. 350 crore


MANGALORE: The Karnataka Urban Infrastructure Development and Finance Corporation (KUIDFC) is yet to lay 120 km of underground drainage pipelines in the jurisdiction of the Mangalore City Corporation, according to Superintending Engineer, KUIDFC, M.K. Maninarayana.

The pipelines are being laid under the Karnataka Urban Development and Coastal Environment Management Project (KUDCEMP) under a loan given to the MCC by the Asian Development Bank.

Mr. Maninarayana was answering questions by councillors at a special meeting here on Wednesday. He said that the KUIDFC had to lay 380 km of UGD pipelines. It had laid 260 km of pipelines since 2003.

He said that 22 pumping stations were being set up to pump sewage from the UGD system to four new sewage treatment plants (STPs) being set up under the project. Of the four STPs, two plants, one at Panchhanady and the other at Kavoor, had been completed. The plants at Jeppinamogaru and Surathkal were under construction.

Mr. Maninarayana said that laying of the pipelines had been delayed due to issues related to land acquisition. The remaining work would be completed by March 2010, he said.

He said that laying UGD pipelines and constructing facilities would cost Rs. 207 crore. So far, Rs. 135 crore had been spent on the work.

Mr. Maninarayana said that the corporation would require 26 people to maintain its STPs and 22 pumping stations. It may have to spend Rs. 2 lakh on their salaries each month.

Giving details about water supply works, Syed Illias Pasha, Superintendent Engineer, KUIDFC, said that it had commissioned a water supply line with 18 MGD (million gallons a day) capacity from Thumbe vented dam to Padil in the city. In addition, it had laid 800 km of water supply distribution lines in the jurisdiction of the corporation.

Now engineers were engaged in linking these pipelines with the main supply lines in the city. He said it would take four months to complete the work.

Mr. Pasha said that the entire water supply work would cost Rs. 106 crore.

J.R. Lobo, Deputy Project Director, KUDCEMP, said that of the water being pumped in the new 18 MGD capacity pipeline 3 MGD water would be supplied to Ullal town and the remaining will be distributed within the city.

Mr. Lobo said that the cost of the works under the KUDCEMP had increased from Rs. 306 crore to Rs. 350 crore. All works under KUDCEMP in the MCC’s jurisdiction would be completed by March next year, he said.

Last Updated on Thursday, 18 June 2009 11:03
 


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