AGEWall : an innovation in embedded retaining wall construction

The AGEwall is a novel technique for embedded retaining wall construction. The concept arose from the desire to reduce the required wall penetration for a wide, shallow basement on a site where very soft ground extended a long way below the proposed foundation depth.

3d view of AGEWall

As illustrated in the accompanying diagrams, the AGEwall provides pre-placed props to the perimeter wall at depth before internal excavation is commenced. The wall is installed in panels, each having a prop connected to the wall by means of a hinge. The panel is placed in a trench, with the prop initially held vertically close to the panel. Subsequently, a slot is excavated perpendicular to the wall to allow the prop to be rotated about its lower hinge and connected to a restraint system. In this way lateral support is provided to the wall at depth before bulk excavation takes place.

As an alternative, in suitable ground, the wall panel could be driven or jacked into place; a pre-bored hole at the prop position may be used to ease installation.

AGEWall : 2d cross section comparing AGEWall with conventional contiguous bored piled wall

There is no reason that the concept should be limited to excavations needing only one level of propping; multiple prop levels are quite feasible. As well as horizontal joints between wall panels, deep walls could also be formed using top and bottom joints, dowels or other reinforcement. Where water-tightness is a particular concern, the joints between pre-cast panels can be fitted with preformed seals and/or grout ducts to allow water sealing by post-grouting.

Depending on the form of the structure, the props can either be removed (and possibly re-used) or incorporated into the permanent structure.

To enquire further, please email us.

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AGEWall : an innovation in embedded retaining wall construction

The AGEwall provides:-

  • Significantly shorter penetration depths for the perimeter wall as it is always propped, not in cantilever
  • Significantly less lateral movement of the wall system Ð and hence less ground subsidence outside the perimeter wall
  • Significantly lower stresses in the wall and therefore thinner and cheaper wall elements
  • Reductions in construction programme
  • Fair face finishes to the wall
  • Greater basement area as a result of the thinner wall section
  • Better quality control for pre-cast wall panels
  • Groundwater control by sealing joints