DESIGN STUDY FOR A CANTILEVER BORED PILE RETAINING WALL WITH RELIEVING SLABS

This paper describes the design of a bored pile retaining wall constructed with a 'relieving slab' placed behind the wall before back-filling. The mass of the backfill was used to pull the wall back. Details are provided of the principle of operation of the rear and front relieving slabs. Details are also provided of the analyses carried out to estimate design bending moments, ground movements, and the required wall penetration for long term stability. These studies were carried out using the University of London, Imperial College Finite Element Program (ICFEP). The assumptions made in these analyses, the results obtained, and the conclusions drawn from them are all presented and discussed. The ground conditions comprised of a small thickness of intermittent Made Ground over Gault Clay over the Folkestone Beds. For the covering abstract see IRRD 860485.