Pad, Strip, Raft & PIle Foundations Q1

Q.
With the aid of diagrams, explain the following types of foundations:

(i) Pad Foundation
(ii) Strip Foundation
(iii) Raft Foundation
(iv) Pile Foundation

(25 marks, 2016 Q1)

A.
Type of foundation and type of soil is common question in Part 1.

Pad, Strip and Raft foundation are shallow foundations and explanation can be found below:

BT1 2012 Q1b

Pile foundation is deep foundation. See below on pile foundation.

Deep foundation.
Types of piles.

Classification of foundation types are as below:

Shallow Foundation:

1. Wall foundation
2. Isolated column foundation
3. Combined foundation
4. Mat or raft foundation

Deep Foundation:

1. Pile foundation
2. Under-reamed foundation (Diaphragm Wall)
3. Well foundation (Caisson foundation)

Ref:

Types of Foundation

Earlier posts.