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Welcome To Presentation onSHALLOW FOUNDATION
UTTARA UNIVERSITYDepartment of Civil & Environmental Engineering
GROUP MEMBERS NAME & ID
SAYED KOUSAR KHANM21415121538
MD.LUTFOR RAHMANM21515121165
SHAHED KARIM MULLICKM214151211027
What is foundation ?
Fig: Foundation
Foundation: Foundation is part of a building, usually below the ground, that transfers and distributes the weight of the building onto the ground such that the compressive stresses do not exceed the bearing capacity of the soil
Types of Foundation:Foundation can be broadly classified into two types–
1. Deep Foundations 2. Shallow Foundations
Shallow foundations:Foundation is placed immediatel
y lowest part of the super structure, is termed as Shallow foundation.
The various types of shallow foundations are :
(a) Spread footing(b) Combined footing (c) Mat or Raft foundation. (d) Grillage footing (e) Eccentrically loaded footing
Spread footings
Spread footings are structural members used to support columns and walls and to transmit and distribute their loads to the soil.
Types of spread footing Wall footings Reinforced concrete footings Inverted arch footing Column footings
Combined footingsCombined footings usually support two columns, or three columns not in a row. Combined footings are used when tow columns are so close that single footings cannot be used or when one column is located at or near a property line.
Raft Foundation
Foundation which consists of thick reinforced concrete slab covering the entire area of the bottom of the structure like a floor.
This foundation was invented by John Root at Chicago in 19th century
Advantages of shallow foundation
It is a quick process compared to others in the construction work.
This type of foundation is also economically cheaper than any other foundations.
Though there are some limitations in mat foundation still it is economical in some cases
Advantages of shallow foundation
It can resist ground water absorption. The damage due to earthquake is lesser than any
other type of foundation. It consists of a reinforced concrete slab which is
more thicker than footing foundation. It prevents unequal settlements.
Disadvantages of shallow foundation Spread footers being installed too shallow, often
times just 2‐3 feet below. A foundation, which does not eliminate the effects of expansive soils.
Foundation repair will last longer than a week as the excavations are made and the concrete will have to be cured before the holes can be refilled.
Disadvantages of shallow foundation
A huge amount of earthwork is to be done in Mat foundation.
Groundwater may come out when the earthwork is done.
Limited to dealing with point loads
CONSTRUCTION PROCESS
EARTHWORK LEVELING
Detailing
THANK YOU