Mat Foundation Design Pdf

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 design pdf.

Instructional materials complementing fema p 751 design examples bearing pressure solution plastic solution is satisfactory. In such a case two or more columns can be supported on a single rectangular foundation as shown in figure 5 1b. Foundation foundation design 27 mat. 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. 45 x95 x7 0 with top of mat 3 6 below grade. Elastic is not. The conventional rigid method and the approximate flexible method.

Design will require extension of the column foundation beyond the property line. Foundation design 28 a plastic solution b elastic solution. If the net allowable soil pressure is known. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method.

It is used where the supporting soil has low bearing capacity. Mat foundations topics. 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. 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.