Noida Supertech towers demolition: The company strategically placed 3,700 kgs of explosives.
Noida Supertech twin towers were razed on Sunday at around 2.30 pm using a technique called waterfall implosion. This is the first time in India that such a large structure was brought down using a controlled explosion.
The two towers -- named Apex and Ceyane -- took seconds to come crashing down like a pack of cards. The two towers were dangerously close to the towers of a legal housing society. The company that oversaw the bringing down of the structures was confident that it would be able to demolish the structure with just cosmetic damage to the other structures.
An official of the company Edifice, Utkarsh Mehta said using the technique called waterfall implosion, they have saved both time and money. Under this technique, the explosion will take place inwards which would make the structure crumble as water does in a waterfall.
The company strategically placed 3,700 kgs of explosives. Since one of the towers of the legal society was just nine meters away, the company had rigged the explosives in such a way that the structures pulled away from the building and then collapsed.
There are three techniques to bring down a building -- diamond cutter, robots and implosion.
Implosion was used to save time and money.
Mehta said the diamond cutter technique would have taken two years to dismantle the building at five times the cost. They would have had to bring each column, wall and beam down slowly using massive cranes. Using robots to dismantle the building would have taken 1-1.5 years and would have cost more than implosion.
Besides, these two techniques would have disturbed the neighboring societies, implosion was chosen.
Since the Supreme Court ordered that the twin towers had to be brought down in less time and with no disturbance to the residents of nearby buildings, the implosion technique was the only option.
"As Edifice and our South African expert partner Jet Demolitions also had precedence and experience from the demolition of Maradu complexes in Kochi, Kerala, we decided to go ahead accordingly," Mehta added.
The authorities evacuated 5,000 residents of Emerald Court and ATS Village. Their vehicles were also removed. Six ambulances were stationed near the towers to deal with any medical emergency.