Mat Foundation Procedure

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations.

Mat foundation procedure.

Sohanur rahman prince 1316006 2. 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. 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.

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. Commonly used type of raft is the solid slab raft without downstand beam. Raft foundation is also known as mat foundation. Check punching shear and determine the required area.

Md alifnur salim 1316016 4. Syeda khushnuma wasim 1316011 3. Aliur rahman shuvo 1316027 bangladesh university of engineering and technology 3. 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. The net pressure increase in the soil under a mat foundation can be reduced by increasing the depth d f of the mat. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Good design must not only be safe but must aim to save construction costs time and materials.

When mat foundation is supported by columns rather than. 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. It is used where the supporting soil has low bearing capacity. A raft foundation may be rectangular fig.

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. Diagram bmd for this strip and the procedure is repeated in the x and y directions for all strips. To begin constructing the solid slab raft foundation the vegetative top soil original soil is removed then the soil left behind is compressed. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively.

The following procedures should help to achieve this and an educated client will recognize the importance of funding this work with a realistic fee.