raft footing

floating foundation

A reinforced concrete slab used to support and distribute the concentrated load from columns in a soil having low bearing capacity; also called a raft foundation or mat foundation.
References in periodicals archive ?
Tenders are invited for Construction of RCC Elevated Over Head Reservoir (intze) of capacity 1000 cum of staging height 20 meter with Raft footing including pipe connection for head works within Kharagpur Municipality under Water Supply Scheme of Special B.
The towers will be constructed on reinforced concrete piles and a raft footing with a reinforced concrete and/or steel superstructure.