India has joined the nations that have destroyed structures taller than 100 metres with the successful demolition of the twin towers. In a stunning display of modern engineering, a skyscraper that was taller than Qutub Minar collapsed in a matter of nine seconds. It fell to the ground like a house of cards by the ‘waterfall implosion’ technique. The implosion that brought the structure down employed almost 3,700 kg of explosives. Residents of the nearby structures have been relocated to safer areas. Surface traffic was also redirected, and the airspace was shut down for around 30 minutes. Continue reading to know the details of the twin tower demolition:
The Apex (32 storeys) and Ceyane (29 storeys) towers violated numerous construction regulations. The property was given to Supertech Ltd in 2004 by New Okhla Industrial Development Authority (NOIDA). It was permitted to build a housing society that would later become known as Emerald Court. The Authority approved the building plan to construct 14 buildings with 10 stories each in 2005. It was in accordance with the New Okhla Industrial Development Area Building Regulations and Directions 1986.
However, a 37-meter height limit was imposed on the maximum height. According to the initial blueprint, the project consisted of 14 buildings with 10 stories each, a shopping centre, and garden space. Additional land for the project was given to the firm in June 2006 under the same conditions. The company changed the strategy, and the garden was eliminated in the revised plan to make room for two additional towers.
Reasons behind the demolition
The Allahabad High Court received a petition from the Residents Welfare Association (RWA)in 2011. It was alleged that the UP Apartment Owners Act, 2010, was broken during the tower’s construction. The twin towers are said to have been built in the area originally intended for the garden. Before the Allahabad High Court hearing could begin, the Authority approved the new plan offered in 2009.
The Allahabad High Court rendered its decision in favour of the RWA. It issued a directive for the twin towers’ demolition in April 2014. It requested that Supertech pay to demolish the towers and refund the homebuyers for their money plus interest of 14%. In May 2014, Supertech and Noida Authority appealed the decision to the Supreme Court, stating that the regulations were followed during the construction. However, in August 2021, the Supreme Court upheld the Allahabad High Court’s decision to have the towers demolished.
The technology used for demolition
The ‘Waterfall implosion’ method was used for the precision destruction of the towers. It made sure that the trash fell like water. Utilizing controlled detonation as an implosion technique, South African specialists assisted Mumbai-based Edifice Engineering with their demolition work. The two towers inside were filled with 3,700 kg of explosives. Ceyane only had ten primary blast floors, compared to Apex’s eleven. This destruction took around seven months to plan, starting in February and in April, there was a trial. Impact cushions decreased the vibration caused by falling debris.
What’s after demolition?
Ramky Group has been given the assignment to clear the debris. Within the confines of Noida’s Work Circle 7, around 21,000 cubics mt of waste will be moved and discarded. Edifice Engineering will attempt to recover as much as possible from the destroyed building. Edifice Engineering will use the iron and steel that could be found in the debris to partially recoup the costs of the demolition. The Noida Authority’s waste treatment facility in Sector 80 would probably get some debris.
This narrative of the twin tower’s destruction serves as a reminder that laws and regulations must be followed strictly. The company that undertook the demolition will reclaim up to Rs 15 crore from the leftover 80,000 tonnes of debris from this demolition.