Mat Foundation Design Example

Example a mat foundation is to be design by the conventional method rigid method for the loadings shown in fig.

Mat foundation design example.

Instructional materials complementing fema p 751 design examples. Raft mat foundation is used in those places where we have less bearing capacity of the soil. Example 3 calculating the bearing pressure on a mat foundation subjected to a vertical column and wall load 3 14 start example 4 calculating the bearing pressure on a continuous footing subjected to. Mat or raft footing all quantities calculations with example problem this video is explained quantity surveying.

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. 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. You will use staad pro us example no. Load path and transfer of seismic forces.

All columns are 40x40cm ultimate soil bearing pressure q ult 100kpa f yk 300mpa f yd 300 1 15 260 87 mpa c25 f ck 20mpa f ctk 1 5 mpa. Force on a pile eq on unloaded pile. 45 x95 x7 0 with top of mat 3 6 below grade. You can only import a staad pro model that has been successfully analyzed because you will want to have the support reactions available for the foundation design.

Instructional materials complementing fema p 751 design examples foundation design 3. This video explained all the quantity survey. 17 2 common types of mat foundations 17 3 bearing capacity of mat foundations 17 4 example 17 5 differential settlement of mats 18 1 field settlement observations for mat foundations 18 2 compensated foundations 18 3 example 19 1 structural design of mat foundations conventional rigid method. 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.

Although mat foundations are more difficult and more costly to design than individual spread footings they can be used effectively. Staad foundation advanced will use the imported geometry and support reactions to design a mat foundation for the structure. Foundation foundation design 27 mat. 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.

8 for this example. 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.