Mat Foundation Design Pdf

The structural design of mat foundations can be carried out by two conventional methods.

Mat foundation design pdf.

If the net allowable soil pressure is known. This type of foundation tends to be heavily overde signed for three major reasons. Foundation design 28 a plastic solution b elastic solution. It is used where the supporting soil has low bearing capacity.

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. Design will require extension of the column foundation beyond the property line. Foundation foundation design 27 mat. The conventional rigid method and the approximate flexible method.

Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. Elastic is not. Mat foundations topics. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows.

10 2 types of mat foundations figure 10 1 illustrates several possible mat foundation configurations. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method. In such a case two or more columns can be supported on a single rectangular foundation as shown in figure 5 1b. The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations.