Quarry Bay sunken vessel: survey and salvage
Underwater survey of a sunken barge, then cutting it into three sections of 91, 119 and 180 tonnes to lift it out.
- Location
- Quarry Bay, Hong Kong Island
- Status
- Founder's project experience
- Category
- Underwater & marine
Founder's project experience. Our founder took part in the construction design and site work on this project. It was carried out as part of another company's team, not under the Yan & Partners name.
A barge sank at Quarry Bay and settled on a sloping seabed. The team first surveyed the wreck underwater and drew its plan, sections and how it lay against the seabed.
It was too heavy to lift in one piece, so the team planned an underwater cut into three sections of about 91, 119 and 180 tonnes, sized to the available lifting capacity. The drawings set out the cutting procedure and direction, and the sling arrangement for lifting each section.
From the drawings
The work was in 2009. The barge lay tilted at about 10° at −6.0 to −9.2 m. Three divers worked from a high- and low-pressure air and mixed-gas panel. The hull was cut underwater in a planned sequence into three sections of about 119, 91 and 180 tonnes, each lifted by derrick barge on steel lifting beams.
Drawings
