Description: This report sets out the background and provides guidance on the key issues for foundation reuse. It is aimed at developers, funders and technical professionals who are interested in an overview of the principal issues relating to reuse of existing foundations for new structures. The content addresses the practical and technical problems of reusing foundations and suggests strategies for reducing risks.

Keywords: ground engineering, construction management

Contents: Introduction; 1.1 Key issues; 1.2 Historical content; 1.3 Foundation options for new developments; 1.4 Drivers for change; 2 Requirements; 2.1 Reliability and safety; 2.2 Building performance; 2.3 Durability; 3 How can foundations be reused?; 3.1 Foundation information; 3.2 Compatibility; 3.3 Foundation capacity; 3.4 Design codes and regulatory approval; 3.5 Identification of risk; 3.6 Cost; 3.7 Programme; 3.8 Risk and liability; 3.9 Addressing builder users’ concerns; latents defect insurance; 4 Technical considerations for reuse of old foundations; 4.1 Desk study; 4.2 Assessing current conditions; 4.3 Monitoring to verify performance; 4.4 Field investigations; 4.5 Foundation performance; 4.6 Assigning a new design/working capacity; 5 Allowing new foundations to be reused in the future; 5.1 Information to be saved; 5.2 Smart foundations; 5.3 Design of a foundation platform to support successive buildings; 6 Questions a developer should ask his team when contemplating foundation reuse; 6.1 For reuse of old foundations; 6.2 For new foundations to be reused in the future; 7 References; 7.1 References cited from text; 7.2 Other useful foundation reuse references; Appendix 1: Case histories; Case history 1 Thames Court; Case history 2 Empress State Building, Earls Court, London; Case history 3 Juxon House, St Paul’s Churchyard, London; Case history 4 Reconstruction of Network Rail Bridge 2/11 – 2/12 adjacent to Clapham Junction