Raft foundation design and analysis with a practical approach

What are the 4 types of raft foundation?
Types of raft foundation include:
Solid slab raft, sometimes referred to as a plain raft, and including; flat rafts, mats, wide toe rafts, slip plane rafts, blanket rafts, and so on.Slab beam raft.Cellular raft.Piled raft..
What are the methods of design for raft foundation?
Raft foundations can be analysed using the rigid approach or flexible approach.
The conventional rigid combined footing approach is a method of analysing raft foundation using simple statics without any consideration of the elastic properties of the raft and the soil and their interaction..
What is raft foundation method of construction?
A raft foundation is a reinforced concrete slab under the whole of a building or extension, 'floating' on the ground as a raft floats on water.
This type of foundation spreads the load of the building over a larger area than other foundations, lowering the pressure on the ground..
What is raft foundation PDF?
 A raft foundation is a continuous slab of concrete
usually covering an area equal to or greater than the. base of the building or the structure to provide. support for walls or lightly loaded columns and serve. as a base for the ground floor.  It spreads the load of the building over a larger area..
What is the construction methodology for raft foundation?
Construction Process of Raft Foundation
Determination of the depth of raft footing.
Excavation of the soil to a suitable depth.
Soil Compacting.
Laying a waterproofing membrane at the bottom..
What is the design concept of raft foundation?
Raft foundations are a type of foundation with high integrity in which four foundation piers are connected together using a large foundation slab to form a massive structure and the foundation piers are connected through beams..
What is the method of raft foundation analysis?
A raft foundation may be analyzed as either a rigid or flexible foundation due to the stiffness of the foundation and subsoil.
In these designs, several linear elastic springs represent subgrade soil under the raft foundation..
Types of raft foundation include:
Solid slab raft, sometimes referred to as a plain raft, and including; flat rafts, mats, wide toe rafts, slip plane rafts, blanket rafts, and so on.Slab beam raft.Cellular raft.Piled raft.
Construction Process of Raft Foundation
Determination of the depth of raft footing.
Excavation of the soil to a suitable depth.
Soil Compacting.
Laying a waterproofing membrane at the bottom.
The conventional rigid combined footing approach is a method of analysing raft foundation using simple statics without any consideration of the elastic properties of the raft and the soil and their interaction.
Here, the raft is analysed as a large beam member independently in both directions.

Available Textbooks, Handbooks, Various Publications And Papers Give Widely Different Approaches For Design Of Raft Foundations. These Approaches Make Their Own Assumptions And Deal With Ideal Raft, Symmetrical In Shape And Loading. In Actual Google BooksOriginally published: 2007Author: Sharat Chandra Gupta

How rafts are analysed in design office?

In design office where computer facilities are available, rafts are being analysed by flexible approach considering the stiffness of the raft alone

The piles are being assumed to be equally loaded and hence piles of equal safe load capacity are provided throughout the raft

Should a raft be designed for increased raft moments?

The common practice is not to design the raft for these increased moments as these are to be re proportioned and resisted by super structure and retaining walls

(e) Under seismic conditions, the increase in base moments and the column loads affects the raft moments

What is the design of a raft?

7 4

1 Example Details The design of the raft has been done utilising beam and slab constructl'on with beams projecting upward

For this purpose raft was considered to consist of beams only in both longitudinal and transverse directions

Raft foundation design and analysis with a practical approach

What are the 4 types of raft foundation?

Types of raft foundation include:

What are the methods of design for raft foundation?

What is raft foundation method of construction?

What is raft foundation PDF?

What is the construction methodology for raft foundation?

What is the design concept of raft foundation?

What is the method of raft foundation analysis?

Types of raft foundation include:

How rafts are analysed in design office?

Should a raft be designed for increased raft moments?

What is the design of a raft?