Cannon Place, London: design and construction over a live railway station

Abstract

This paper describes the design and construction of a dramatic 50 000 m2 ‘air-rights’ development above Cannon Street main-line and underground station in London and a scheduled ancient monument. The complex building structure includes two 21 m deep cantilevered wings, requiring a 38-stage structural analysis and full-height pre-cambering of façade structures. Careful phasing and meticulous planning were required to segregate and shield passengers from construction activities. The challenges were successfully overcome by fully integrating design and construction, permanent and temporary works designs, and working in a truly collaborative environment.