The Phuket Fantasea
The Phuket Fantasea Theatre located on Kamala beach, Phuket island, south of Thailand, has basements up to 12.4m deep, to accommodate lifting facilities for the theatre stages and podiums. 1.0m thick diaphragm walls with toe depths 18.0m to 21.0m were used for excavation and basement construction with top-down method. Foundation barrettes of 1.0x2.7m founded in weathered granite at depths of 21.0m, support the building. The maximum excavation depth was about 17.0m. Barrettes were designed as a column and cast up to ground level to support the roof structure and reinforced concrete beams of the ground floor slab. 8 pumping wells were used to lower the ground water level during basement excavation. A total of 151 anchor piles with toe depths up to 29.0m were installed for basement slabs to resist the uplift pressure caused by seasonally high groundwater level.