Mat Foundation Procedure

A mat foundation spreads out under the footprint of the building and declines the contact pressure compared to conventional strip or trench footing.

Mat foundation procedure.

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. 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. Diagram bmd for this strip and the procedure is repeated in the x and y directions for all strips. Md razu alam raz 1316022 5.

Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. When mat foundation is supported by columns rather than. Syeda khushnuma wasim 1316011 3. It is used where the supporting soil has low bearing capacity.

Good design must not only be safe but must aim to save construction costs time and materials. Md alifnur salim 1316016 4. 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. This approach is generally referred.

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. To begin constructing the solid slab raft foundation the vegetative top soil original soil is removed then the soil left behind is compressed. Foundation engineering 2 design of mat raft footings dr. Commonly used type of raft is the solid slab raft without downstand beam.

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. 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. Basma the following values for x and y along with the sign conventions are used to estimate q u a p p l i e d.

Aliur rahman shuvo 1316027 bangladesh university of engineering and technology 3. A raft foundation may be rectangular fig. The raft foundation is a very commonly used type of foundation system. Sohanur rahman prince 1316006 2.

Design procedures for a building foundation step by step design procedure of foundation.