Why pile foundation is more suitable than a shallow foundation?

Pile foundation is needed in areas where the structures constructed are large & heavy and the soil underlying is weak. In areas where settlement issues are common due to soil liquefaction or water table issues, pile foundation is a better choice.

Why would a pile be a good choice for a foundation system?

Piles transfer the loads from structures to hard strata, rocks, or soil with high bearing capacity. The piles support the structure by remaining solidly placed in the soil. As pile foundations are set in the soil, they are more tolerant to erosion and scour.

Is pile foundation a shallow foundation?

Piles are deep foundations. They are formed by long, slender, columnar elements typically made from steel or reinforced concrete. A foundation is described as ‘piled’ when its depth is more than three times its breadth (Atkinson, 2007).

Where is pile foundation recommended?

Pile Foundations are recommended only when a raft foundation cannot be proposed due to excessive settlement caused due to the underlying loose or compressible soil.

Which conditions require pile foundation?

Conditions That Require the Use of Pile Foundation

• Compressible or Weak Upper Soil Layer.
• Presence of Horizontal Forces.
• Presence of Expansive Soils.
• Subjected to Uplifting Forces.
• Soil Erosion.

How deep should piles be?

Piles were typically concrete, installed to a depth of 300 mm or more. Houses could be supported fully on piles, or have internal bearer support only provided by piles.

Is code for pile boring?

Following are the Indian Standard Codes on Pile Foundations: IS 2911 : Part 1 : Sec 1 : 1979 Driven cast in-situ concrete piles. IS 2911 : Part 1 : Sec 2 : 1979 Bored cast-in-situ piles. IS 5121 : 1969 Safety code for piling and other deep foundations.

What is the difference between deep foundation and pile foundation?

Pile foundation is a kind of deep foundation, is actually a slender column or long cylinder made of materials such as concrete or steel which are used to support the structure and transfer the load at desired depth either by end bearing or skin friction. Pile foundations are deep foundations.

What is shallow foundation?

Shallow foundations are constructed where soil layer at shallow depth is able to support the structural loads. The depth of shallow foundation is generally less than its width. It can be used where the bearing capacity of soil on which the structure is to be constructed is maximum then Shallow Foundation can be used.

What is the difference between deep and shallow footings?

They are basically classified depending on the depth at which the foundation is provided. Shallow foundation and deep foundation have several differences. Sources of main differences between deep and shallow footings are definition, depth of foundation, cost, feasibility, mechanism of load transfer, advantages, disadvantages, types, etc.

What is Under-reamed pile foundation?

Under-reamed pile foundation is commonly used in black cotton soils that swell or shrink when exposed to water or in large quantities upon drying. It is a bored-in-situ stack that extends one or more is provided with bulbs along its length known as under-rims.