CASTLE QUAY, ST HELIER, JERSEY
Work is now underway on the first phase of this Axis Mason designed mixed-use development on St Helier’s waterfront, comprising a range of contemporary apartments, retail and restaurant accommodation for Dandara (Jersey) Ltd.
Amplus designed and installed 1200nr piles using a combination of their Casagrande CFA 425, Casagrande B125, Casagrande C6 and Technodrill TD610 rigs.
Approximately 190metres of concrete guide wall was cast to facilitate the installation of a contiguous pile retaining wall. The retaining wall consisted of nearly 300nr 450mm diameter contiguous wall piles approximately 13m long.
The foundation piles included 230nr x 750mm CFA piles carrying loads of up to 2550kN and 530nr x 450mm CFA piles carrying loads of up to 900kN. In addition, approximately 150nr rotary percussive piles were drilled through a rubble seawall using the Symmetrix system.
To withstand hydrostatic pressure on the basement slab during construction, Amplus installed 85nr temporary anchors socketted in to rock.
Amplus completed the works ahead of schedule in 2008.
SANDRINGHAM
The Sandringham at 14 Gloucester Street, is a 7 storey mixed-use development designed by Axis Mason and containing retail space and a clinic at ground floor with a seperate medical centre occupying ground and first floor levels, and with 5 upper floors of apartments. There is also a part basement.
Amplus employed a variety of piling systems to create the basement and foundations of this development in challenging ground conditions.
Amplus installed 69nr 350mm and 450mm diameter, secant and contiguous wall piles using a Casagrande CFA 425 and TD610 piling rigs together with 138nr 450mm diameter foundation piles each carrying up to 1000kN. In addition, Amplus built 18nr 450mm diameter segmental flight auger piles close to an old brick culvert using a TD610 piling rig. The work was completed in 5 weeks in 2007.
HARBOUR REACH
This project consists of 6 storey mixed-use building with 42nr apartments, offices & retail with basement car parking over most of the site footprint. The superstructure is a braced steel frame supported on piles. The building was designed by Naish Waddington Architects for Spinnaker Developments Ltd
Amplus installed 332nr 250mm diameter, 11m long, permanently cased rock socketted mini-piles to carry compressive loads of up to 600kN and tensile loads of up to 300kN. Amplus employed two piling rigs, namely a Casagrande C6 and a TD610, using ODS and Symmetrix drilling systems to complete the work in 11 weeks in 2003.
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