one lifting operation using hydraulic jacking towers that were mounted on an assembly of barges and positioned below the span to be removed. The barges were used to transport the lifted span upstream to clear the piers. The span was subsequently lowered and demolished directly on the lifting platform by conventional means using two (2), 40-tonne excavators, which were positioned on an adjacent temporary work platform. The debris generated during the demolition was transferred to secondary barges for material handling that shuttled between the demolition barge and a temporary wharf that was set up on the shore. “Another important engineering challenge was the in-house design of a sophisticated ballasting system to enable the lifting and displacement of the 2,000-tonne spans, while ensuring the stability of the system when it was deployed to its maximum height of more than 28 metres,” says Hebert “Apart from all the above, our greatest achievement was to complete these complex operations under trying conditions without any incidents, material failures, delays, or environmental damage,” says Hebert. For more information, please visit www.delsan-aim.com 13
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