Mat Foundation Design Pdf

Probably the most common mat design consists of a flat concrete slab 0 75 to 2 m thick and with continuous two way reinforcing top and bottom.

Mat foundation design pdf.

10 2 types of mat foundations figure 10 1 illustrates several possible mat foundation configurations. The conventional rigid method and the approximate flexible method. 45 x95 x7 0 with top of mat 3 6 below grade. If the net allowable soil pressure is known.

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. Mat foundations topics. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Design will require extension of the column foundation beyond the property line.

In such a case two or more columns can be supported on a single rectangular foundation as shown in figure 5 1b. The structural design of mat foundations can be carried out by two conventional methods. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method. Elastic is not.

Foundation foundation design 27 mat. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. This type of foundation tends to be heavily overde signed for three major reasons. The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations.