The construction of the 2.3 km floodwall with boulevard along the Cagayan de Oro River utilized Japanese technology for underground soil improvement using “non-vibratory sand compaction piles method” to minimize building site disruption. This was revealed during this morning’s inauguration led by DPWH officials and representatives of JICA and Embassy of Japan in the Philippines.
This unique ground improvement method developed in Japan improves soft ground by using vibration to install sand or any other similar material into soft ground via a casing pipe and forms sand piles in the ground. The method does not use vibration energy, thereby eliminating loud noise during compaction. SOURCE. See illustration below.
More photos below.