Design of Shallow Foundation (Isolated Footings)
Aim:-
Design a square footing for a column size of 400x400. The compression axial load for the load combination of (1.5 DL + 1.5 LL) is 2000 KN. The safe soil bearing capacity is 150 KN/m2 at a depth of 2 meters below E.G.L. Participants are free to go for either a tapered or stepped footing. Besides the total axial load, also account for the self-weight of the footing and soil above it. Assume M25 concrete grade. Do the following checks
introduction:-
- Footings that are provided under each column independently are called Isolated footings.
- They are usually square, rectangular or circular in section.
- Footing is laid on PCC. Before laying PCC, termite control liquid is sprayed on the top face of the PCC to restrict the termites to damage the footing.
- Isolated footings are provided where the soil bearing capacity is generally high and it comprises a thick slab that may be flat or stepped or sloped.
- This type of footing is the most economical when compared with the other kind of footing.
Drawing based on the above calculation as shown below:-
Critical section for Bending moment
Critical section for two shear
Critical section for one-way shear
RESULT:-
Using the given details the square footing has been designed successfully and detained drawing refer as give below.
Critical section for Bending moment
Critical section for two shear
Critical section for one-way shear
