What are the Needs and Functions of Pile Foundation? The pile foundation will be chosen based on the: Soil Condition Types of Loads acting on the foundation The bottom layers of the soil The site conditions Operational Conditions The pile foundation consists of pile cap and piles either present in single or in groups. The loads coming from the superstructure is transferred safely to the hard strata, soil, and rocks below by means of piles.
Piles are long slender members that can have a length of more than 15m. There are many functions provided by the pile foundation that result in its tremendous applications in construction. Here, we will discuss the necessity and the functions of pile foundation. Previous article. Next article. Gopal Mishra. Steel pile foundation are either a rolled steel section or a conical shape or it can be a sheet piles. When the piles transfer the load of the building through the soft-soil layer to a suitable bearing stratum at greater depths, it is called a bearing pile.
When pile foundation moves the load only through the skin resistance without any end bearing then the pile are called friction piles. 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.
Pile foundations with ems section at the bottom are called taped piles, these piles are used to increase the density of the subsoil by driving these piles into loose soil. The type of material that is used for the construction of the pile, the following are the uses of piles:.
We use the piles to transfer the load through soft soil to a suitable bearing stratum by using the end bearing or toe bearing property of the pile.
To build a structure within the water or on the water river or canal bed, we have to build the foundation through the river bed and within the scour depth. In these situations, if we go for shallow foundation then we may have to use cofferdam or some diversion which is very non-economic. Pile foundation is usually used to carry the compressive nature of the load through the tip bearing or end bearing. In the case of tall structures or towers, there may be tension that must be resisted by the piles.
For a tower carrying high power transmission lines, i. Turbines and silos for the foundation of buildings supporting vibration equipment where vibrations are important and cause failures. They bear on frictional resistance between their outer surface and the soil in contact. Friction piles do not rest on hard strata. Basic principles of pile foundations and their classifications are recommended topics to review prior to taking the FE Civil exam. Types of piles based on shape and composition.
This website uses cookies to ensure the best experience possible. If you want to learn more about how we use cookies, see our Privacy Policy. Basic Principles and Classifications of Pile Foundations. Shallow and deep foundations signify the relative depth of the soil on which buildings are founded. Types of foundations and basic mechanisms involved in the classification of deep foundations are reviewed in our FE Civil exam review course for those preparing to become an engineer in training.
A pile foundation is defined as a series of columns constructed or inserted into the ground to transmit loads to a lower level of subsoil. Piles are first cast at ground level and then hammered or driven into the ground using a pile driver. By School of PE June 21,
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