The attached article MAY put the matter to rest http://www.wildsingapore.com/news/20070304/070309-5.htm. It said that for safety reason, Sg usually allow the reclaimed land to settle for 20 years. The article went on to say that buildings on reclaimed land will not sink if they are supported by steel or concrete columns that are hammered all the way into the seabed.
As a matter of fact, Japan's Kansai International Airport, the world's first airport built on reclaimed land, has sunk more than 11.5 metres since construction began in 1987. I guess the authority may have allowed the Changi Airport land to sufficiently settle before building on it.
Yes, multi-storey buildings are all resting on deep piles that reach to the solid stratum in the ground.
Buildings over the reclaimed land are also the same hence the building will not sink.
BUT, its the freshly reclaimed land over which the buildings were built that sinks!!!!
Singapore had allowed about 20 years for natural settlement to prevent this happening.
So here, in time to come, when uneven settlement happens, you'll see cracked roads, large potholes all over, landscaping ruined, etc.
Those smaller low rise buildings with raft foundation on bakau pile will eventually slant and tilt and have cracks all over.
And if you are lucky (or unlucky depend on how you look at it) you may even get to see the exposed foundation under the apartment blocks exposing when the earth sinks.
Anyway, I had also never said anything about sinking apartment blocks.
Only people like Cslong with only limited knowledge dares to argue and bitch and not feel embarrassed.