Jewel's five level of basements were built with a top-down construction method
Jewel is a 10-storey building with five levels above ground and five below. With the development having the deepest basements in the whole of Changi Airport, many studies, including geotechnical studies, had to be conducted by the Projects Team to assess the soil condition and impact to surrounding buildings. Typically, basements are constructed from the bottom-up, whereby all the soil is excavated, and foundations are placed from the bottom and working upwards. But this method could not be used because of the buildings surrounding Jewel, including the Air Traffic Control Tower.
Instead, a top-down construction method was adopted for Jewel. Excavation and construction works were done one level at a time, moving downwards, while all adjoining structures around Jewel were monitored round the clock to ensure they are not adversely impacted throughout the development works.
3. Jewel is actually being built around the existing Skytrain track