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The Incredible Versatility of Piling Techniques

Foundation selection and building

Whether it’s Piling Contractors in North London or anywhere else in the worldBuilding any infrastructure is a highly demanding task that involves numerous steps. Starting with planning, engineers and architects must prepare an executable plan while fulfilling all the requirements of a construction project.

From designing the infrastructure to ensuring it is safe for everyone, a construction team must meticulously perform every step, including selecting and creating foundations. A superstructure has to be supported by the surface it stands on. Otherwise, its integrity can be compromised at any given time. Selecting and designing foundations is a significant task and involves several steps.

Factors affecting the selection of foundations

Although there are countless types of foundations, they are broadly divided into deep and Shallow foundations. These foundations are selected based on several factors, including:

  • Soil quality ( Load bearing value (LBV), soil type, moisture content, reaction to climatic changes, etc.)
  • Purpose of the infrastructure ( Residential, commercial, industrial, or public)
  • Building regulations
  • Construction site access.
  • Presence of adjacent structures (trees, archaeological sites, residential areas, etc.)

Deep Vs Shallow foundations

Shallow foundations are selected when the soil quality is adequate, and the soil can withstand heavy loads. They are considered suitable when the soil is not highly responsive to climatic changes, and its moisture content is tolerable.

However, deep foundations are preferred when surface soil conditions are not favorable. The infrastructure load is transferred to deeper and more suitable layers of soil in several ways. One such method is the piling technique used by every foundation-building company. These techniques have found extensive application from Piling Contractors in North London to elsewhere.

Piling Contractors in North London

What is piling?

The piling technique uses “piles” or columns to transfer the load of the superstructure to deeper and stronger soil strata. The columns or piles are made from solid materials and inserted into the ground. The dimensions of the piles are carefully chosen to ensure that they can accomplish this transmission of load.

What are the different types of piles?

When categorized based on function, piling can be classified as:

Sheet Piles: Sheet piles are typically interlocking steel sheets. They are driven into the construction site to provide excavation support and earth retention. The sheet piles form a temporary or permanent wall for lateral support and reduce groundwater inflow.

They are arranged in sequence along the excavation perimeter. They are typically driven with the help of vibratory hammers. They are used in underground construction, such as car parking lots, basements, marine locations, seawalls, land reclamation, and retaining walls.

Friction Piles:

Friction piles are a piling system that is used for creating solid foundations for heavy infrastructure such as bridges, roads, and stadiums, bridges at sites where the topsoil does not have adequate qualities.

These piles act as a wedge ad are also known as floating piles. They are ideal for sites where the hard stratum of soil is too deep to reach. These piles transmit the weight from the topsoil to the deeper soil layers by friction or adhesion between the soil and the pile surface.

Concrete, rebar, timber, and steel have all been used to construct piles. However, the preferred choice these days is reinforced concrete or steel. Underpinning Services often use piling methods to reinforce existing foundations that have been compromised. Piling is also used for building foundations of construction sites with limited or restricted access.

Bearing Piles:

Bearing piles are installed for supporting vertical loads. They transfer the load of the structure above to hard strata. They are driven/hammered into the site soil till a hard stratum is reached. There are different bearing piles, including box piles, tubular piles, wife flange, and H-flange. Bearing piles can be precast or cast in situ. They are easy to install and have no size limitations. They are often used for constructing railway bridges, jetties, and piers.

CFA and SFA Piles

CFA (Continuous Flight Auger) and SFA (Sectional Flight Auger) work on the same principle. Hollow stem continuous flight auger piling is one of the most effective methods that reduce installation time and result in solid foundations. CFA and SFA piles consist of hollow stem augers driven into the ground while concrete is pumped to fill the hollow stems created by the augers.

Highly advanced rigs are used for CFA and SFA. They are also low-cost and highly versatile methods, as they can be used for various types of soils. The primary difference between SFA and CFA is that the former uses grout while the latter uses concrete. CFA rigs are more suitable for more significant construction sites and are much bigger than SFA rigs.

Ahsan Khan
Ahsan Khan
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