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