Question

Match List-I (Foundation) with List-II (Demanding situation) and select the correct answer using the codes given below the lists:

List-I
A. Under-reamed piles
B. Floating rafts
C. Combined footing
D. Strap footing

List-II

Codes:

A B C D

• A. 3 2 4 1
• B. 4 1 3 2
• C. 4 2 3 1
• D. 3 1 4 2

Answer 1

The correct option is D 3 1 4 2

• Under reamed piles are used to restrict damages due to volume change of swelling soils (as it causes uplift pressure).
• Combined footing is used when a foundation is built close to an existing building or the propety line, there may not be sufficient space for equal projections on the sides of the exterior for equal projections on the sides of the exterior column.
• Strap footing consists of two spread (isolated) footings joined by a rigid beam known as strap. Its main function is to transfer the moment from the exterior footing to the interior footing.
• An exact balance of weight removed against weight imposed, the result is zero settlement of the building. This is the principle of floating foundations. Such a foundation is very useful for weak soils.