The Hong Kong Police Headquarters are located at 1 Arsenal Street, Wan Chai, which are the headquarters of the Hong Kong Police Force.
The Headquarters complex comprises several buildings, including Arsenal House (including main building, East and West Wing) and Caine House. Phase 3 development involves construction of the main building of Arsenal House, which became a skyscraper located in the Wan Chai district. The tower rises 47 floors and 206 meters (676 ft) in height and a deep basement with 4 levels.
Construction of diaphragm walls and mini piles as retaining structures and foundations respectively for the main building of Arsenal House. The works also include shear pinning of diaphragm walls, contact grouting and rock fissure grouting underneath diaphragm wall toe.
– Diaphragm walls: (a) 1.2m thick, (b) 353m long, (c) excavation area 8,347m2
– Mini piles: (a) 460 nos., (b) diameter 273mm
– Shear pins: (a) 351 nos.
– Contact grouting: (a) grouting depth 1m
– Rock fissure grouting: (a) grouting area 2,305m2