Now the floating foundation can be of two types, When flood approaches, the building would rise to a necessary height, as shown in the figure-1.įig.1: Buoyancy Rafts or Hollow Box Foundation in case of Flood Types of Buoyancy Rafts or Hollow Box Foundations This arrangement is a flexible method, as the building would remain on the ground under the normal conditions.
The construction of buoyant foundation would help in increasing the elevation of the house. Occupants in low-altitude areas face the problem of high floods resulting in the collapse of houses. No other foundation like pile foundation cannot be an efficient replacement for these. Those areas with soft soil, layer in a huge depth is observed, it is economical to go for floating foundation.
Need for Buoyancy Rafts in Building Construction
The estimated building settlement is more than the safe limit. The buoyancy rafts are adopted under the following cases: Hence the weight removed from the soil is compensated by the weight of the building. These are known as fully compensated foundations as during their construction the soil underneath the foundation is removed, whose weight is equal to the weight of the whole superstructure. Whatever be the name they are known for, they come under the category of floating foundations. The buoyancy raft foundations are also known as compensated foundations or deep cellular rafts. Disadvantages of Buoyant Raft Foundation. Design Considerations for Buoyancy Raft or Hollow Raft Foundation. Construction of Buoyancy Rafts or Hollow Box Foundations. 
Types of Buoyancy Rafts or Hollow Box Foundations. Need for Buoyancy Rafts in Building Construction. Buoyancy Rafts or Hollow Box Foundations.
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