Question: What Is Well Foundation And Its Types?

What is pile foundation and its types?

Pile foundation , 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 are the types of pile?

5 Types of Pile FoundationBored Piling. Bored piles are installed by auguring into the ground forming a hole into which concrete can be poured, thereby casting the pile in position. … Driven Piling. Driven piles are driven or hammered into the ground with the use of vibration. … Screw Piling. … Mini Piling. … Sheet Piling.

What is the shape of well?

Although wells can be dug in any shape, almost all wells are round. The reason for this is that a round well produces the greatest amount of water for the least amount of work. Also, a round lining is the strongest that can be built for the smallest quantity of materials.

How do you build a well Foundation?

Well foundations are constructed in stages by sinking under self-weight as well as dredging the soil inside the dredge hole and on the sides outside. The first step in the construction of a well foundation is to lay the cutting edge and well curb.

What are the different types of well Foundation?

These well foundations are discussed below:Circular Wells: Circular wells are simple in construction, easy to sink, and require minimum steining thickness due to lower flexural stresses than in other types. … Twin Circular Wells: … Square/Rectangular Wells: … Double-D Section Wells: … Hexagonal/Octagonal Wells:

What do you mean by well Foundation?

Well foundation is a type of deep foundation which is generally provided below the water level for bridges. Cassions or well have been in use for foundations of bridges and other structures since Roman and Mughal periods. The term ‘cassion’ is derived from the French word caisse which means box or chest.

Where is pile foundation used?

Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth, increasing the effective size of a foundation and resisting horizontal loads.

Why are caissons used?

In geotechnical engineering, a caisson (/ˈkeɪsən/ or /ˈkeɪsɒn/; borrowed from French caisson, from Italian cassone, meaning large box, an augmentative of cassa) is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair …

Why Well Foundation is used?

These are constructed by sinking Cassions from the surface of either land or water to some desired depth. Well foundations provide a solid and massive foundation for heavy loads and are useful in situations where the loads have to be transferred to a soil stratum deep below.

What is a working pile?

It covers vertical and raking piles tested in compression (i.e. subjected to loads or forces in a direction such as would cause the pile to penetrate further into the ground) and vertical or raking piles tested in tension (i.e. subjected to forces in a direction such as would cause the piles to be extracted from the …

Why pile foundation is preferred?

Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth, increasing the effective size of a foundation and resisting horizontal loads.

What is a friction pile?

Friction pile is a kind of pile foundation. This type of pile utilizes the frictional resistance force between the pile surface and adjacent soil to transfer the superstructure load. Depending on the subsoil strata condition, resistance force due to friction can develop in a definite pile length of on the full length.

What are the components of well Foundation?

What Is Well Foundation | Component of Well FoundationWell Curb.Cutting Edge.Steining Thickness.Skin Friction.Bottom Plug.

How many types of pile tests are there?

Load tests on piles are conducted on completion of 28 days after casting of piles. Two types of tests namely initial and routine tests, for each type of loading viz. vertical, horizontal (lateral) pull out, are performed on piles.

What is the purpose of test piles?

Pile load test provides information on ultimate bearing capacity but not settlement behavior. In essence, it can determine if the load is taken up by the stratum designed or if the centre of resistance is at the design location in piles as suggested by Robert D. Chellis (1961). R is the reaction load on pile.

What is the pile load test?

Static pile load testing is one of the most common methods for testing the actual in-situ capacity of a pile. The test program involves the direct measurement of pile head displacement in response to a physically applied load. Piles can be tested for compression, tension or lateral loads. …

What are the 3 types of foundations?

But chances are your house has (or will have) one of these three foundations: full basement, crawlspace, or slab-on-grade. Other variations are possible. Here are the three main types of house foundations that you will encounter in residential construction.

What is a tension pile?

Tension piles, also known as uplift piles or anchor piles, are a type of pile foundation that is used to resist uplift forces that might otherwise cause it to be extracted from the ground. Uplift forces can develop as a result of hydrostatic pressure, seismic activity or overturning moments.