Mat Foundation Design Example Ppt

Conventional rigid method approximate flexible method.

Mat foundation design example ppt. The spread footings cover over 50 of the foundation area because of large column loads. The soil is soft with a low bearing capacity. 6 mat raft foundation 7 types of mat foundations 8 to design mat foundation. Mat foundation often considered to be used when dealing with the following conditions.

Load path and transfer of seismic forces. This is tutorial no 7 of raft mat foundation design course in csi safe. If a single square footing need to be designed under the maximum axial load that is occurred in columns type 4. Unmoving soil eq motion.

Deflected shape soil. Structural design of mat foundations the structural design of mat foundations can be carried out by two conventional methods. Force on a pile eq on unloaded pile pile supporting structure. Structural design of mat foundation free download as powerpoint presentation ppt pdf file pdf text file txt or view presentation slides online.

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. Example 8 3 4 see example 8 3 4 in textbook page 363. 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. The properties used in the analysis and the design of this raft foundation are shown in table 4.

This also covers how to check ultimate moment resistance design reinforcement plac. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first two design methods. Design of raft foundation page 13 3 3 0 why raft should be used. Finite difference and finite element methods can also be used but this section covers only the basic concepts of the first design method.

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. Structural design of mat foundations the structural design of mat foundations can be carried out by two conventional methods. The conventional rigid method and the approximate flexible method. Hydrostatic uplift resistance is needed etc.