India Goes Trenchless

India Goes Trenchless

The Hyderabad Metropolitan Water Supply and Sewerage Board (HMWS&SB) will use trenchless technology for replacing trunk sewers with minimum disruption.

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The Delhi Jal Board has been using trenchless technology 'cured-in-place piping' (CIPP) for replacing sewer lines in its jurisdiction.

According to water board officials, there were 612 km length of 600 mm diameter or above sewer network in the city and nearly 1.85 lakh manholes. As over 90% of the network was laid decades ago, it was suffering damages.

On September 21, a trunk sewer got damaged near NTR Garden. The 5.5-km trunk sewer was laid between Divya Shakthi Apartment, Ameerpet, and GHMC head office surplus nala. The water board replaced the damaged line by diverting traffic for four days.

In view of the damage, the officials decided to study the entire sewer system and adopt the latest technology. As part of the effort, a three-member HMWS&SB team visited Delhi Jal Board work sites to study the CIPP system.

"The team visited Govindpur and Kalkaji area, where Delhi Jal Board is using CIPP system, a jointless, seamless, pipe-within-a-pipe system with the capability to rehabilitate pipes. In this system, a pipe will be inserted from one manhole to another without a human entering the trunk sewer," HMWS&SB director-operations, G Rameshwar Rao, who visited Delhi, told TOI.

Explaining it, he said, "CIPP does not require excavation to rehabilitate a pipeline that is either leaking or structurally unsound."

The team decided to use CIPP on the 5.5-km Divya Shakthi Apartment-GHMC main office sewer main. According to estimates, the water board needs Rs 80 crore to take up the work. Tenders would be floated once the government gives the nod to take up the work, he said.

"The team visited Govindpur and Kalkaji area, where Delhi Jal Board is using CIPP system, a jointless, seamless, pipe-within-a-pipe system with the capability to rehabilitate pipes. In this system, a pipe will be inserted from one manhole to another without a human entering the trunk sewer," HMWS&SB director-operations, G Rameshwar Rao, who visited Delhi, told TOI. Explaining it, he said, "CIPP does not require excavation to rehabilitate a pipeline that is either leaking or structurally unsound."

Source: The Times of India