MAT Foundation (or) Raft Foundation

Mat foundation is otherwise called as Raft Foundation and its working principle is similar to Shallow foundation. Mat foundation is preferred for large space where separate footings are not possible to construct due to overlapping condition. Generally, Mat foundation's footing will extend over a large area. The main reason why the Mat adopted by most  Engineers is Mat will distribute loads equally to prohibit differential settlement. Mat is considered when the soil condition is so Poor & week.

Types of MAT or Raft Foundation

 i) Flat Plate with Uniform Thickness

ii)  Flat Plate Thickened under columns

iii) Basement wall slabs

Design of MAT Foundation

Before designing, the following items are to be determined

i) Bearing Capacity of Foundation

ii) Settlement of Foundation

iii) Stress distribution

iv) Differential Settlement

Assumptions

Rigid and Flexible

Tags:Mat Foundation, Desing, Raft Foundation