Mat foundation often considered to be used when dealing with the following conditions.
Mat foundation design example ppt.
The soil is soft with a low bearing capacity.
Design of raft foundation page 13 3 3 0 why raft should be used.
Force on a pile eq on unloaded pile pile supporting structure.
Instructional materials complementing fema p 751 design examples foundation design 3.
This is tutorial no 7 of raft mat foundation design course in csi safe.
Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively.
The properties used in the analysis and the design of this raft foundation are shown in table 4.
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.
Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first two design methods.
Conventional rigid method approximate flexible method.
The spread footings cover over 50 of the foundation area because of large column loads.
Structural design of mat foundations the structural design of mat foundations can be carried out by two conventional methods.
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.
This also covers how to check ultimate moment resistance design reinforcement plac.
Deflected shape soil.
If a single square footing need to be designed under the maximum axial load that is occurred in columns type 4.
The conventional rigid method and the approximate flexible method.
Hydrostatic uplift resistance is needed etc.
Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method.
Unmoving soil eq motion.
Example 8 3 4 see example 8 3 4 in textbook page 363.
Structural design of mat foundation free download as powerpoint presentation ppt pdf file pdf text file txt or view presentation slides online.
This foundation will be used for a loose sand soil.
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.
