notes of civil eng Foundation engineering.ppt

notes

1. Foundation Engineering
Chapter -1
Introduction

2. Types of soil
(1) Residual soils
(2) Transported soils
Residual Soils
Residual soils are found at the same location where they have
been formed. Generally, the depth of residual soils varies from 5
to 20 m.
Transported Soils
Weathered rock materials can be moved from their original site
to new locations by one or more of the transportation agencies to
form transported soils. Transported soils are classified based on
the mode of transportation and the final deposition environment.

3. Foundation
The foundation is the lower part of a structure that
transmits the weight of the structure on to the natural
ground.
Types of foundation

4. Type of footing
Column footing
wall footing

5. Type of footing
Combine footing Strap footing

6. Mat foundation

7. Deep foundation
In deep foundation the depth to width ratio is usually
greater than 4. Eg pile foundation. pier foundation and wells
or cassons foundations are deep foundation.

8. Factors Affecting the foundation
•The function of structure.
•The load that foundation can carry
•Need of owner
•The sub-surface condition
•Cost of foundation compairing with super structure
•Service life
•Margine of safety
•Risk level
•Environmental consideration
•Constructability etc.

9. Thank you