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Types of Excavations

Irrespective you are undertaking a residential or a commercial project, civil and infrastructure projects such as bridges and roadways, underground installation of pipelines, gas lines and other utilities etc.; it is essential to ensure all these projects are built on a strong foundation. Excavation is essential for almost every construction project. Excavation involves removal of soil, rocks and other material from the ground and excavating contractors use a wide array of tools, equipment and techniques for excavation. Different projects might require a different form of excavation techniques and methodology depending upon the material used and the purpose of the excavation.
Some of the various types of excavations undertaken by excavating contractors during construction projects are as follows.

  • Excavation as per Material
  1. Topsoil Excavation
    This involves removing the topsoil or the topmost exposed area. It also involves removal of soil, vegetation and other decaying material which can make the site unsuitable for installation and usage of load-bearing structures, if any at the excavation site.
  2. Rock Excavation
    As the name suggests, this form of excavation involves the clearing of rocky surfaces which can obstruct the construction process. It is one of the most challenging forms of excavation due the hardness and toughness of the surface. It requires special heavy equipment and utilisation of techniques such as blasting and drilling for removal of rock or clearing a tough surface.
  3. Muck Excavation.
    The mixture of soil and water is known as muck, and as the name suggests, it involves removal of muck from the construction site as muck is highly undesirable during construction work or any other form of work as it moves material movement and working in areas covered or filled with muck difficult and dangerous. Muck excavated is usually spread out to dry or transferred to another area.
  4. Earth Excavation
    It involves removal of layers of earth, which include the topsoil and various under the topsoil. Earth excavation is essential for creating foundations for buildings, bridges, or constructing drainage ditch etc.
  • Excavation by Purpose
  1. Stripping Excavation

It is also known as cut and fill excavation. This form of excavation is used for clearing large areas of land. It involves removing shallow and wide layers of topsoil, sand, rocks and vegetation along with other unwanted material

 Trench Excavation
This form of excavation involves excavating areas where the length of the area been excavated is more than its depth. Trench excavation is widely used for installation and burying/covering pipelines, gas lines, sewer systems etc. It is also used to lay the foundation at times. This excavation technique is dependent on various external factors such as the purpose of excavation, ground conditions, obstacles and obstructions at the work site etc.

Dredging
Sediment deposition can accumulate over time under the water, at this moment making construction and passage difficult. It involves excavation and removal of sediments and another form of debris from below the surface of the water to allow easy passage of boats and ship and also allow for construction activities.

Selecting the type and form of excavation depends on various external factors as mentioned and explained above. It is essential to select the right excavating contractors for your projects who have experience and knowledge of various excavation techniques. Art-Con Civil is one of the leading excavation contractors in Sydney providing a wide array of excavation services