Excavation in Construction: 10 Things (2024) You Need to Know

If you’re starting a construction project on your land, you’ve probably heard the term “excavation” thrown around.

This type of construction work is necessary to create a buildable foundation.

However, not every site is created equal, and there are many different kinds of excavation in construction.

If you’re interested in learning more about what this process entails and the team that’ll handle it for you, keep reading.

1. What is an excavation in construction?

Excavation is the process of removing earth to create a cavity in the ground.

It can be done with tools, equipment, or explosives.

This type of work has numerous applications including construction, exploration, trenching wall shafts, environmental restoration, tunneling underground, and mining.

Not all excavation uses the same process to remove dirt.

In some cases, excavation requires trenching and digging while others use a dredging or site development approach.

2. How does the excavation process work?

Before a site is excavated, it will be carefully examined to ensure that the process used preserves both the natural habitat and artifacts surrounding it.

After that, the construction company will make plans for the size and depth of the site.

The contractors will create drawings, so they can clearly mark the site’s boundaries.

Following that, the excavation process can begin.

From start to finish, this procedure includes:

bulletSetting out corner benchmarks

bulletSurveying the ground and top levels

bulletExcavating to the approved depth

bulletDressing the loose soil

bulletDewatering wells and interconnecting trenches

bulletMaking boundaries for the buildings

bulletConstructing the protection bunds and drains

3. What are the different types of excavation?

Here are the top 8 types of excavation used in construction:

Excavation by Material:

bulletTopsoil

Topsoil excavation involves the removal of the earth’s surface.

It removes vegetation, soil, and other decaying materials that could make the land unable to bear structural loads.

bulletRock

Rocky surfaces aren’t suitable for building, so rock excavation removes these elements.

Most of the time, special equipment and techniques like drilling and blasting are required.

bulletMuck

Muck is a combination of soil and water.

It must be removed during construction so that the building process can continue.

During removal, it is either moved to another area or spread out so that it can dry out.

bulletEarth

In some cases, earth excavation is necessary to create a foundation for buildings and bridges.

Additionally, you may want to remove the earth to construct drainage ditches.

Not only does earth excavation involve the removal of topsoil but also the layer below it.

Excavation by Purpose:

bulletCut and Fill

Cut and fill is also known as stripping excavation.

During this type of excavation, wide and shallow layers of topsoil, rocks, sand, and other unwanted materials are removed.

In addition to these processes, grading may also be performed.

bulletTrench

This type of excavation is when the length of excavated areas exceeds the depth (shallow trenches – less than 6 meters, deep trenches — more than 6 meters).

You’ll see trench excavation utilized when burying service lines, installing pipelines and sewer systems, or laying foundations.

Factors that impact the success of trench excavation include ground conditions, the number of obstructions, and the purpose of the dig.

bulletBasement

If you’re looking to dig a basement at least partially or entirely below ground level, you’ll need to do a basement excavation.

This can be a complex process depending on the size of the property.

Be sure to hire an experienced contractor for this project.

bulletDredging

Dredging is when you excavate and remove sediments and debris from underwater to allow boats and ships to pass easily for other construction purposes.

Sediment builds up naturally over time.

This can make construction and passage difficult.

Fortunately, dredging can ease the use of these areas for a variety of purposes.

4. How should you choose an excavation team for your project?

If you’ve been reading up on excavation in construction hoping that it’ll give you a glimpse into how to find the right contractor, look no further.

Here’s a short list of tips that can help you deduce the right fit for a disaster waiting to happen.

bulletUnderstand your excavation needs

By simply reading through the list above, you probably have a sense that you’ll need to figure out what type of excavation you need.

If you’re not familiar with construction, never fear.

Your construction professional can help you.

bulletFind an insured contractor

Construction is an accident-prone business.

No matter how hard you may try to avoid incidents occurring, there’s never a 100 percent chance of everything going smoothly.

We recommend asking your contractor directly about their liability insurance.

A reputable contractor will be happy to share this information with you.

If they don’t, move on to the next team, so you can make sure you’re properly protected.bulletRead reviews

As with anyone your hire, do your due diligence and read reviews!

Past performance is the best indicator of future performance, so take what previous customers say seriously.

Read reviews and testimonials about any contractor that you want to hire.

If you want to make sure you’re getting really honest opinions, always look for reviews that are not on the contractor’s platform (such as Google) or ask to speak directly with a past customer over the phone.

These are simple ways to vet a potential company or team and can ensure you have a good experience.

bulletDiscuss scheduling

If you’ve been involved with any construction project previously, you’ll know that the timeline will quickly become a thorn in your side.

Often, the time frame given can become doubled in no time at all.

Make sure that any contractor you’re working with understands your timetable as well as your limitations.

Working with someone who is a bit laissez-faire with your needs will only be frustrating to you.

This is doubly important depending on what season you’re beginning construction in.

For example, if you’re starting construction in the spring when the ground is thawed, then you’ll want to take advantage of this.

An efficient and timely excavation is in your interest!

5. What are the safety concerns with excavation in construction?

When it comes to construction, both excavation and trenching are among the most dangerous operations.

According to OHSA, the top dangers include the following:

bulletThe collapse of the sides of the excavation

bulletMaterials fall onto people on-site

bulletFalls by people or vehicles

bulletNearby structures collapsing into the excavation

bulletRisks caused by damage to underground services such as electrocution, explosion, blasts, gas leak, or flooding

6. How do you stay safe on an excavation site?

Excavation trenches can collapse due to a lack of protection.

As a result, protective systems and measures are necessary to ensure that everyone on-site remains safe.

Here are some safety measures you should consider:

bulletImplementing supports (such as planking or hydraulic jacks) as well as shields that protect the trench box

bulletStoring materials from the excavation at a safe distance from the trenches to reduce the risk of people falling into them

bulletAdding barriers to the excavation trench so no one is at risk of falling

bulletKeeping vehicles completely out of an excavation area if possible

bulletInstalling barriers or stop-blocks for vehicles if they are necessary in the excavation area

bulletMarking cables, pipes, and service plans to ensure that underground services are known

bulletUsing spades and/or shovels instead of mechanical equipment where possible on underground services

bulletAvoiding flooding by ensuring there is appropriate pumping equipment that can pump water out to a safe area

bulletAvoiding picks and forks as they are more likely to pierce cables and pipes

Examples of necessary excavation protection tools include:

bulletStructural ramps

bulletHigh-visibility vests

bulletWarning signs

bulletTesting

bulletEmergency equipment (stretchers, harnesses, etc.)

bulletRegular inspections

7. Why is excavation necessary in construction?

Excavation helps to prepare the site for building.

For any building project, you need a level and stable foundation for a structure.

Creating this means you must remove earth, rocks, and other materials, which is where excavation comes in.

Excavating your site property sets you up for success.

8. What are the equipment and machinery used in excavation?

Excavation machinery is any machine that is used in digging or earth-moving operations.

These include power shovels, bulldozers, graders, backhoes, etc.

As with any machinery on a construction site, you must treat these machines carefully and proceed with caution.

9. How do you choose an excavation team?

As you may expect after reading the above, excavation is not a DIY project.

You need experienced contractors to help you with any excavation project.

This type of construction procedure requires experience, skill, and attention to detail.

When contractors excavate an area, they are creating a foundation for the entire project.

You want to make sure it is done right!

For this reason, we recommend hiring a heavy industrial contractor who has experience completing large excavation projects in the past.

This individual (or team) should know how to operate the heavy machinery and tools required for excavation projects as well as perform the techniques typically used.

10. What are the steps of excavation in construction?

After you hire a contractor to perform the excavation on your land, here is the general process they’ll follow.

bulletSite preparation

Excavation in itself is a form of site preparation.

However, before the excavation process can take place, there will still need to be a certain level of preparation for the construction and clearing of land that is ahead.

During this stage, your contractor will focus on tree, vegetation, and rock removal.

Furthermore, any other obstacles that must be eliminated from the land will be tackled at this point, so they don’t detract from the building process.

bulletFoundation construction

During the excavation process, trenches and pits are dug so concrete footings and walls can be created as a stable base to support the weight and load of a structure.

Without these, there is no sturdy foundation for whatever you hope to build.

bullet Utility installation

If you’re hoping to have a structure with water pipelines, sewer lines, electrical conduits, and telecommunications cables, the excavation process is essential.

This is when the groundwork is laid so that you’ll have access to all these services.

Trenches are dug to accommodate these essential infrastructure components, and once the structure is built, you’ll be able to properly place and connect them.

bulletEarthwork and grading

If you’ve ever wondered why a piece of land doesn’t have the right drainage or functionality, blame the people who excavated the site.

It’s at this stage of the process that these factors are determined.

Contractors will shape the land through excavation and will determine the necessary contours and slopes for maximum site functionality and proper drainage.

Depending on your land, earthwork may also be a step that your contractors will consider.

This involves moving and redistributing soil to achieve the desired grading and efficient water runoff while preventing erosion.

bulletAccess and construction logistics

The excavation process sets up other construction teams for success.

It creates a construction site that heavy machinery, construction vehicles, and equipment can easily access with temporary roads, ramps, entrances, etc.

Final Thoughts

Excavation in construction is a necessary process that allows you to prepare your land for a building project.

This is a specialized procedure that requires the expertise of an experienced contractor as well as adherence to safety protocols and the use of appropriate machinery and equipment.

Take your time finding the right team of contractors for you.

They’ll not only operate heavy machinery but also create the foundation for whatever structure you hope to have on your land one day.

It’s worth investing in a skilled professional to ensure a successful excavation!

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Erika Gokce Capital

Disclaimer: we are not lawyers, accountants or financial advisors and the information in this article is for informational purposes only. This article is based on our own research and experience and we do our best to keep it accurate and up-to-date, but it may contain errors. Please be sure to consult a legal or financial professional before making any investment decisions.

Erika

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