Mat Foundation Design Pdf

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

Mat foundation design pdf.

Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. 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 type of foundation tends to be heavily overde signed for three major reasons. The conventional rigid method and the approximate flexible method.

It is used where the supporting soil has low bearing capacity. Elastic is not. 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 or raft foundation is a large concrete slab supporting several columns in two or more rows.

Mat foundations topics. If the net allowable soil pressure is known. In such a case two or more columns can be supported on a single rectangular foundation as shown in figure 5 1b. Instructional materials complementing fema p 751 design examples bearing pressure solution plastic solution is satisfactory.

Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method. Foundation foundation design 27 mat. 45 x95 x7 0 with top of mat 3 6 below grade. Design will require extension of the column foundation beyond the property line.