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Types and Methods of Excavation

When it comes to excavating a site it can be hard to decide which method is the best for you.

Selecting the wrong excavation method could make it impossible to complete the project or even result in damaging underground utilities and cost you in the process. The average cost for damage to underground utilities is around £30,000 and can even run into the millions.

A company was charged £210,000 when a worker was killed after striking an underground utility.

There are many different situations where you may need excavation work done, and the choice of tools and vehicles can become overwhelming.

VAC UK have dug up the dirt to provide you with all the information you need to know about your excavation project.

We’ll help give you peace of mind when deciding which excavation technique is the best for you.

Excavation Materials

Excavation Types

VAC UK

14 Different Excavation Situations

Excavation is a broad term meaning to move or remove earth or other materials with tools or equipment. Excavation can be utilised in a number of different situations, such as the construction of buildings & bridges, installing underground utilities, and even building tunnels.

Depending on the situation, the material being moved, the most efficient method of removing it may vary. We have split the situations into 2 categories, the material and the purpose, to help you decide what equipment and method matches your requirements.

Excavating Materials

Some excavation techniques will be much more efficient than others. Because of this, we have listed the main types of materials and how you should approach your project.

 

  1. Sand and Fine Soils Excavation

Sand and fine soil excavation is one of the most basic excavation methods. This involves the removal of fine materials, such as sand, from an area. Sometimes, this excavation method is used to package and move the material. Other times it is just used to remove the material from the area.

Almost every method for excavation works with sand and fine soil except drilling. It is important you take into account the size of the operation and whether or not you plan on reusing the material you are excavating when considering your different options.

 

  1. Topsoil Excavation

Topsoil excavation is the method of excavating that is defined by the material: the top level of soil including vegetation and its rootzone. This method is used to remove anything that would be unsuitable to bear structural loads. This includes vegetation, soil, and any other decaying material.

Topsoil excavation is one of the most common excavation methods.

 

  1. Rock Excavation

Rock excavation, one of the more difficult excavation types, is the method of clearing rocky terrain and surfaces to prepare for a construction project. Due to the scale and hardness of the rocks, more conventional equipment such as diggers, excavators and picks aren’t efficient in breaking up and removing this material.

Depending on the size of the rocks, you will have to use drills or even explosives to penetrate and break up the rock making it small enough to excavate.

 

  1. Muck Excavation

Muck excavation is the combination of liquid (usually water) with dirt, creating a sloppy unpleasant material. This can be undesirable, and often have a negative impact on nearby rivers, lakes or ponds.
Using large excavation vehicles such as diggers, excavators or vacuum excavators you can collect the material and spread it out allowing it to dry up or you can relocate it.

 

 

  1. Earth Excavation

Earth excavation is the method of removing the soil located underneath the topsoil. Usually, a method used to lay out a structural foundation, it can also be utilised for creating drainage ditches and other projects.

With most earth excavation projects being fairly large, they will normally be performed by excavation vehicles such as suction excavators, diggers and dump trucks.

 

 

  1. Liquid

Not to be confused with muck excavation, liquid excavation is the relocation, and usually disposal, of liquid from an area. This is usually performed on small ponds, lakes or silos, as well as removing liquid from projects which has accumulated as a result of bad weather.

This is usually conducted by machines such as suction excavators and vacuum trucks.

 

Excavation Purposes

Depending on the job at hand, the method of excavation will change. A form of excavation which may be perfect for one environment could be completely ineffective in another.

 

  1. Cut and Fill

Cut and fill excavation is sometimes known as stripping excavation and is the method construction companies use to clear and prepare large areas. This method involves removing all of the material such as rock, sand, and topsoil that would be unstable to work on.

Due to the scale of these operations, this method usually requires large excavation vehicles such as excavators and back-hoes.

 

  1. Trench

A trench is an excavation where the length exceeds the depth. Typically this method is used to prepare for or replace underground utilities, foundations, and sewer systems.

The method of conducting trench excavation is dependent upon many different factors including its size, the likelihood of underground utilities and materials. This means that the most effective method of excavation changes from project to project, and should always be treated with caution.

If there is a likelihood of encountering underground utilities, we would recommend first conducting an underground utility survey to help locate these utilities. If utilities are found lower risk techniques such as vacuum excavation and manual digging are recommended depending on the size of the project.

If there is nothing to watch out for, and the project is a larger one, then we would recommend a large excavation vehicle.

 

  1. Dredging

Dredging is the removal of built-up underwater sediment which can make it difficult for boats to navigate or construction to get underway. Over time, debris and other sediments can build up in an area which can make it dangerous for vehicles and can impede construction.

Depending on the scale of dredging, it can either be performed from land by vehicles such as vacuum excavators and grab dredgers, or by water using naval excavators.

 

  1. Basement

Basement excavation is the excavation of the area beneath a property. This can be a very complicated procedure. It is important the equipment used for this is both accurate and well equipped for the situation.

The best equipment for this excavation changes from project to project, and depends on the opening size, property size and basement size.

 

  1. Bridge

When constructed, bridges require very solid foundations to make certain that they don’t become a hazard in the future. It’s therefore important that the area is correctly excavated and reviewed before construction begins.

Certain materials and objects that may have negative impacts on the bridge’s stability and efficiency of construction will need to be removed to keep the project running smoothly. Choosing the right method depends on the size and the location of the bridge.

Most bridges require large construction vehicles such as excavators, and diggers to ensure the construction is as cost-effective as possible.

 

  1. Borrow

Borrow excavation is different to most excavation types as the goal is to not remove the material but instead to relocate it to be used for a separate project. This type of excavation is most commonly used for sand, gravel and soil, with plans to mix it with construction materials such as concrete.

Borrowing not only requires a method for the initial excavation, but often requires sorting and grading later on. The most efficient equipment for this excavation type can range from suction excavators to dump trucks, depending on the end-use of the borrowed material.

 

  1. Channel

Channels and bodies of flowing water can quickly get a buildup of sediments and other materials. The goal of channel excavation is to remove the built-up sediment and other materials to help control the flow of water and decrease the likelihood of flooding. The size of the channel can vary between jobs meaning the volume of sediment to remove, and the most cost-effective method of removing it, can also vary.

 

  1. Drainage

Drainage systems are used to carry water and other liquids from one location to another. To avoid blockages and flooding it is important that they remain clear and unblocked.

This excavation type is used for drainage ditches, storm drains, and draining waste around structures. Due to drainage systems usually being small and hard to get to, precision forms of excavation are required. This can include manual methods such as handheld tools, and powered equipment like suction trucks and vacuum excavator trucks.

 

VAC UK

When hiring a vacuum excavator from VAC UK Ltd you will not only receive a top of the range excavation truck, but you will also be provided with one of our highly trained operators. All of our operators have years of experience dealing with all types of excavation.

This means that no matter what your excavation needs are, we are here for you, allowing you to focus on the rest of your project, safe in the knowledge that your excavation needs will be completed as efficiently and effectively as possible.

At Vac UK Ltd, we can ensure the use of our vacuum excavation units meet the current requirement with regards to the new social distancing rules implemented by HM Government.

All of our crews will carry out work on-site, adhering to the 2-metre rule whilst operating the Vac Ex. We manage this through on-site control measures using a Social Distancing checklist before the start of the shift. We have risk assessed the hazards with regards to COVID-19 and set control measures in place before and during the work activity.

If you are working on critical essential infrastructure on the water, gas, power, telecoms, airport, highways, rail and want to know how Vac UK can help you comply with the two-metre rule then feel free to contact us.

Vac UK in the City of London today

Vac UK in the City of London today

Vac UK in the City of London today. Vac UK have very powerful machines but our skilled drivers can get them into the tightest of spots. We can also provide up to 200m of extension hosing to access the most confined areas. Helping to keep your workers and your clients assets safe.

Live in the City of London

Vac UK safely digging around the live utilities in the City of London today. When your digging up the streets in the financial capital of the world you can’t afford to take any chances. Knock out a power line or hit a gas or electric cable you could cause millions of pounds or damages or a health and safety incident. If you want to dig around live utilities the safest way call Vac UK.

Environmentally Friendly Vacuum Excavation

We’re all looking to do our bit to save the environment. If you are digging around live utilities as well as being safer and often more cost effective, vacuum excavation is also the most environmentally friendly option. With a Vac Ex you can:

  • Minimise damage to trees and shrubs
  • Use less lorries on site
  • Dig smaller excavations
  • Keep a smaller construction site
  • Keep cleaner site

All of the above reduces your carbon footprint keeping both your clients and the Antarctic penguins happy 🐧

All of Vac UK’s vehicles are the latest model and are less than 12 months old. So unlike most of our competitors, they all have the new Euro 6 engine which reduce the pollutants you send into the atmosphere.

Safety First


Kilkern set up Vac UK last year and is investing ten million in an effort to reduce cable strikes across the UK. Whilst busy sucking up the earth we’ve been shocked to discover where people have actually laid the existing utilities. If you check the pictures below you can easily see it wouldn’t be a good idea to use a shovel or a 360 excavator to try to excavate the ground around these utilities. If you did you could damage the existing pipework or cause injury or potentially the death of a worker or a member of the public. Despite all the extra investment in the industry on health and safety, cable strikes have actually increased year on year.

The industry needs to use the latest advances in technology and put safety before cost to see improvements in health and safety performance. Looking at these pictures would you expect someone to have laid these electric cables so close to the surface of the ground? Would you have expected the cables to be left exposed? Would you expect someone to be asked to dig around these cables rather than hire a Vac Ex to safely suck up the earth from around the cables? You wouldn’t but people are still doing all these things as they’re putting cost before safety and in doing so endangering lives. Don’t let anyone make the same mistake on your job.

Two New Additions

VAC UK get ready for another 2 additions to the family! Two state-of-the-art mega boom RSP vacuum excavators due to arrive mid-February.

Plantworx 2019


Vac UK, Kilkern’s vacuum excavator business are exhibiting one of our brand new ever expanding fleet of suction excavators at Plantworx 2019 this week in Peterborough. Join us on stand FA09 for a live demonstration of the latest technology and best practice for safe, environmentally friendly mechanised digging around live services. Yesterday the weather was desperate but the forecast is looking a lot better today so it will be the ideal day to pop into us for a cup of tea and a sandwich if you were thinking about going to the show.

New Brochure

Download Kilkern’s new vacuum excavator business VAC UK’s? new company brochure.

DOWNLOAD BROCHURE

If you are interested in hiring a vacuum excavator please do not hesitate to contact us. Any queries, please call Sean Gallagher on 07802757873 or email [email protected]

Out for Maintenance Work

One of our specially configured vacuum excavators getting ready to head out from our yard with a four man team for Highways England maintenance work last night.

Our New Fleet of Vacuum Excavators

Our parent company, Kilkern, have recently invested in a multimillion pound fleet of state of the art vacuum excavators. These will be available for hire with drivers in 2019 operating as VAC UK, which was launched to facilitate safe digging practices around live services.

We have already had a lot of bookings for these so best to book in advance.

Our Brochure

Want to browse all we have to offer at a time that suits you? No problem! Simply download our brochure to find out more about our Vacuum Excavators.

VAC UL Ltd Brochure Download

Quick Enquiry

Get in touch to find out more about how vacuum excavation can save you time and money.

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