Diaphragm Walls

Diaphragm walling is a process of forming cast in situ reinforced concrete underground walls, from the surface in sections (or panels).

BBGE’s experience in diaphragm walling is extensive with projects ranging in size from 2,000 to 100,000 square metres and from a few metres to over 50 metres deep. BBGE is uniquely experienced in carrying out complex operations on restricted urban sites and was responsible for installing diaphragm walls in less than 6 metres of headroom in the redevelopment of Westminster Station.

Diaphragm walling is typically between 600mm and 1,500mm in width with panels varying between 2.7m and 7m in length. Excavation is by grab – either rope suspended or hydraulically operated Kelly grabs. Walls can be installed as suitable load bearing using reinforcement cages.