One of Keller’s key areas of expertise is in the field of deep basement or ground retention engineering.
With more pressure than ever before on urban space, developers are increasingly digging down to expand their buildings. We work closely with our clients to deliver affordable and buildable solutions, employing a range of specialist techniques. These include Secant Piling, Diaphragm Walls, Contiguous Piling Walls, Sheet Piles and Soil Mixing.
Soilcrete jet grouting can provide an underpinning system flush with the edge of the foundation being supported, for constructing new basements and deepening existing ones, particularly where there is insufficient room for piles.
And on sites with high groundwater levels, a combination of traditional and alternative methods – contiguous piles and jet grouting – can be used to provide both structural capacity and groundwater cut-off, improving the seal between piles at depth.
Keller has a wide range of solutions to help our clients maximise the developable area of their sites, which often means cutting into and stabilising existing slopes.
We provide a number of retention systems, including traditional bored or secant pile retaining walls supported by high capacity soil and rock anchors; design and construct soil nailed slopes; and the latest ground improvement methods to stabilise slope soils.
Keller uses both wet and dry soil mixing to stabilise slopes, the former in combination with steel sections to provide vertical retention, with or without the assistance of ground anchors; the latter in cuts to improve clay soils, with slope angles of greater than 1:1 being achievable.
We provide a design and construct service for installation of soil nails, providing an efficient and safe way to retain slopes. Combined with facade systems, these can create aesthetically pleasing facings.