Mat Foundation Design Example Ppt

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

Mat foundation design example ppt.

Conventional rigid method approximate flexible method. The properties used in the analysis and the design of this raft foundation are shown in table 4. Hydrostatic uplift resistance is needed etc. Load path and transfer of seismic forces.

Force on a pile eq on unloaded pile pile supporting structure. Deflected shape soil. The soil is soft with a low bearing capacity. 6 mat raft foundation 7 types of mat foundations 8 to design mat foundation.

This also covers how to check ultimate moment resistance design reinforcement plac. 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. Instructional materials complementing fema p 751 design examples foundation design 3. 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 foundation will be used for a loose sand soil. The conventional rigid method and the approximate flexible method. 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. Design of raft foundation page 13 3 3 0 why raft should be used.

The spread footings cover over 50 of the foundation area because of large column loads. Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. This is tutorial no 7 of raft mat foundation design course in csi safe. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method.

Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first two design methods. Unmoving soil eq motion. Structural design of mat foundations the structural design of mat foundations can be carried out by two conventional methods. Mat foundation often considered to be used when dealing with the following conditions.