This is how China does land reclamation on coral reefs in Spratly Is. in S China sea. Dump sand on coral reefs and firm it up with millions of tons of concrete, acting against the interests of its neighbours Philippines and malaysia .. see regional map at the BBC link below..
China building 'great wall of sand' http://www.bbc.co.uk/news/world-asia-32126840
Pic courtesy BBC ..