Mat Foundation Procedure

Raft foundation is also known as mat foundation.

Mat foundation procedure.

This approach is generally referred. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. The net pressure increase in the soil under a mat foundation can be reduced by increasing the depth d f of the mat. Diagram bmd for this strip and the procedure is repeated in the x and y directions for all strips.

The raft foundation is a very commonly used type of foundation system. A mat foundation spreads out under the footprint of the building and declines the contact pressure compared to conventional strip or trench footing. Check punching shear and determine the required area. A raft or mat foundation is a sizable concrete slab or slab and beam system which supports all the loads of superstructure through walls or columns in two or more rows and rests on soil layer or rock.

Foundation engineering 2 design of mat raft footings dr. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Md alifnur salim 1316016 4. Good design must not only be safe but must aim to save construction costs time and materials.

A raft foundation may be rectangular fig. Sohanur rahman prince 1316006 2. When mat foundation is supported by columns rather than. It is a suitable solution for low bearing capacity soil spread footing cover about 70 of the structure high structure loads soft pockets or cavities of in the soil to unknown extent raft and.

A mat foundation also may be used to resist hydrostatic pressures or to bridge over small soft spots in the soil provided the mat is adequately reinforced. To begin constructing the solid slab raft foundation the vegetative top soil original soil is removed then the soil left behind is compressed. Md razu alam raz 1316022 5. Design procedures for a building foundation step by step design procedure of foundation.

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Syeda khushnuma wasim 1316011 3. It is used where the supporting soil has low bearing capacity. Commonly used type of raft is the solid slab raft without downstand beam.

Definition of raft foundation along with working principle when to choose raft types of raft foundation materials of raft foundation raft construction steps etc are discussed below.