Project

Jurong Island is a man-made island formed by joining several smaller islands by land reclamation. Oiltanking Singapore’s Phase 6 Terminal development on Jurong Island involved the construction of 15 nos. product storage tanks ranging in size from 20m to 36m diameter. The 20m high steel tanks were placed on a granular bed. The geology of the site is interesting in that half the terminal (Tank Farm 16) sits on the old Mesamut Darat island and the other half (Tank Farm 17) on primarily reclaimed sandfill' in the channel west of the former island.

The ground underlying Tank Farm 17 consists of 15- 23m of reclaimed sandfill followed by medium to firm clay. It was decided to densify the reclaimed sandfill using Vibro Compaction to limit the potential settlements in the sand. The Client opted not to treat the clay but rather to the tanks and piping system design for the long-term consolidation settlements.

A total of 10'000 square meters of ground was improved using 2 Vibro Compaction rigs. This included a 5m deep and 6m wide ring around the tank footprint to satisfy the Client’s edge stability concerns. The area underneath the tank footprints were densified to full depth.