Highlights
- Supertech Twin Towers demolition will take place at 2:30 pm on August 28
- Ahead of the demolition, Noida DCP visited the Supertech Twin Towers to be demolished
- Traffic planning is in the final stages
Noida Twin-Towers demolition: Edifice CEO has informed that the demolition of the Supertech Twin Towers will take place at 2:30 pm on August 28 and the disintegration of the building will begin within 9 seconds.
Mumbai-based Edifice Engineering along with their South African partner firm Jet Demolitions is carrying out the job, which is certain to make it into civil engineering feats of the world.
Edifice CEO Uttkarsh Mehta said, "The button for demolition will be pressed at 2:30 pm. We are completely ready. Impact cushions have been made to control vibrations. It will take 3 months to clean the debris. The disintegration of the building will start after 9 seconds of blasting."
Ahead of the demolition, Noida DCP Traffic Ganesh Shah visited the Supertech Twin Towers to be demolished.
"Traffic planning is in the final stages. A few days ago, the road in front of the twin towers was closed. All roads connected to it will be closed on the day of the demolition," he said.
Twin-Towers taller than Qutub Minar
Supertech's illegal twin towers in Noida, which are taller than Delhi's Qutub Minar, will become India's highest structures ever to be demolished on August 28.
The buildings measuring a little over 100 metres will literally collapse like a house of cards in a process that would take less than 15 seconds for them to come down, according to project officials.
The demolition would be done through a controlled implosion technique for which over 3,700 kg of explosive will be used in the eye-popping event that would also leave behind a whopping 55,000 tonnes of debris to be managed.
"It will take nine to 10 seconds for all the explosives to blast in a series making a loud noise. After the blasts, the structures won't come down all at once and would take four to five seconds to come down completely," Edifice Engineering partner Utkarsh Mehta told PTI.
"The time for dust dissipation is estimated to be 10 minutes,” said Mehta, whose company has previously executed demolition of illegal residential complexes in Kerala's Maradu, Telangana's secretariat and central prison, and old Motera stadium in Gujarat, among others.
Project officials said the explosives used for demolition include detonators, emulsions and shock tubes, which have explosion material in gel or powdered form.
"These explosives are not very strong in nature but when used in large quantities, they are able to break concrete. These explosives are sold in a regulated manner and strictly after permission from various government agencies," an official said.
The demolition of Supertech's twin towers in Noida's Sector 93A comes in pursuance of a Supreme Court order that found the structures to be illegal and built in violation of norms.
Post demolition debris would be managed scientifically
According to the estimates prepared by the project officials, the demolition of the Apex (32 storeys) and Ceyane (29 storeys) would leave behind approximately 35,000 cubic metres of debris to be cleared and clouds of dust to dissipate.
Noida Authority's General Manager (Planning) Ishtiaq Ahmed said 21,000 cubic metres of the debris would be moved out and dumped at an isolated land measuring five to six hectares in city's work circle seven limits and the remaining would get accommodated in the basement areas of the twin towers where a pit has been made.
"The post demolition debris would be managed scientifically as per rules and guidelines. A final decision on it would come from the regional pollution control board which is examining a report from Edifice Engineering on debris management,” Ahmed told PTI.
According to Mehta, around 1,200 to 1,300 “truck-loads” of debris would have to be moved out from the site.
"However, there has been one good thing of late. The Jet Demolitions team has been tracking flow of the wind for the last one week or so and they have found it flowing towards the West. If the same pattern continues, then most of the dust would blow towards the front side of the twin towers, which is a road followed by an open city park," he said.
The favourable wind direction would prevent the dust from settling within the premises of Emerald Court and ATS Village societies – both in close proximity to the twin towers.
How debris will be used
Though, all the debris will not go to waste as it will yield an estimated 4,000-tonnes of iron and steel that Edifice plans to use to recover a part of the demolition cost. Meanwhile, the Noida Authority has a construction and demolition waste management plant in Sector 80, with a capacity of 300-tonnes per day.
However, considering the rubble that would be moved out, it is still not clear whether it would be processed there and if yes, then how and over what duration of time.
According to project details, the Apex tower has 11 primary blast floors -- where all columns on the floor will have explosives fixed and blasted -- and seven secondary floors -- where 60 per cent of the columns will be blasted.
Ceyane has one less primary blast floor.
The charged columns are wrapped in wired mesh and geo-textile cloth to prevent debris from flying and damaging nearby buildings. There will be six layers each for floors between the basement and sixth floors and four layers each on the upper floors, according to the details.
For protection of Emerald Court and ATS Village, both societies will also have geo-textile covering. About 225 tonnes of wired mesh made of galvanised iron and geo-textile in 110-km length would be used in the entire process.
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