Mat Foundation Design Example Pdf

This approach is generally referred to as the compensated foundation design and is extremely useful when structures are to be built on very soft clays.

Mat foundation design example pdf.

Instructional materials complementing fema p 751 design examples foundation design 3. Mat or raft foundation is a large concrete slab supporting several columns in two or more rows. Compensated foundation the net pressure increase in the soil under a mat foundation can be reduced by increasing the depth d f of the mat. Foundation foundation design 27 mat.

Load path and transfer of seismic forces. Design of raft foundation page 13 3 3 0 why raft should be used. Instructional materials complementing fema p 751 design examples. Example 8 3 4 see example 8 3 4 in textbook page 363.

Example 5 1 completes the analysis and design of shallow foundations for two of the alternative framing arrangements considered for the building featured in example 6 2. Example 5 2 illustrates the analysis and design of deep foundations for a building similar to the one highlighted in chapter 7 of this volume of design examples. 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. If a single square footing need to be designed under the maximum axial load that is occurred in columns type 4.

The bearing capacity increased by combining all individual footings in to one mat since bearing capacity is proportional to width and depth of foundations. Force on a pile eq on unloaded pile. This foundation will be used for a loose sand soil. 45 x95 x7 0 with top of mat 3 6 below grade.