How Does the Water Table Impact Bollard Installations?

When it comes to installing bollards, it’s crucial to consider various environmental factors, including the water table level. The water table refers to the upper surface of groundwater. Its depth can significantly impact the bollard installation process, especially for telescopic or retractable bollards. 

This is what you need to know about the water table and bollard installations.

 

What Is the Water Table and Why Does It Matter?

The water table is the level at which the ground is completely saturated with water. It can vary depending on factors such as rainfall, soil type, and nearby water sources. So, the water table becomes crucial when installing bollards, particularly those that need to be lowered into the ground like automatic bollards.

If the water table is high, it means that the ground is saturated with water at a relatively shallow depth. This can pose challenges during the installation process. You may have to look at additional measures to ensure the bollard’s stability and functionality.

 

How Does a High Water Table Affect Bollard Installation?

You may face these issues if you’re installing bollards in areas with a high water table:

Difficulty in Excavation 

Digging the hole for the bollard’s foundation can be challenging when the ground is saturated with water. The sides of the excavation may collapse, making it difficult to achieve the required depth and width.

Reduced Soil Stability 

Saturated soil has a lower load-bearing capacity, which can compromise the bollard’s stability. The foundation may not be able to support the bollard’s weight and the forces it’s designed to withstand.

Corrosion and Damage 

Prolonged exposure to water can lead to corrosion and damage to the bollard’s internal components, such as the hydraulic systems in automatic bollards. This can result in reduced functionality and a shorter lifespan.

Drainage Issues 

Proper drainage is essential to prevent water from accumulating around the bollard’s foundation. If you don’t look after this it can lead to soil erosion and further stability issues.

 

Addressing Water Table Issues During Bollard Installation

There are several measures you can take to overcome the challenges posed by a high water table. Try these tips during the bollard installation process:

Thorough Site Assessment 

Conduct a thorough site assessment before installation. This way, you can determine the water table level and soil conditions upfront. This information will help you choose the most suitable bollard type and installation method.

Appropriate Foundation Design 

The bollard’s foundation must be designed to withstand the additional water pressure. This may involve using deeper foundations, reinforced concrete, or other specialised materials.

Drainage Solutions 

Proper drainage solutions around the bollard’s foundation prevents water accumulation. This can include installing perforated pipes, gravel beds, or other drainage systems to divert water away from the bollard.

Waterproofing and Protective Coatings 

Consider applying waterproofing membranes or protective coatings to the bollard’s surface and any exposed parts. This will help to prevent corrosion and damage to bollard components.

Regular Maintenance 

Bollards installed in areas with a high water table may require more frequent maintenance to ensure their longevity and proper functioning. Regular inspections and servicing can help identify and address any issues before they escalate.

 

Choosing the Right Bollard Type for High Water Table Areas

Make sure you take the specific challenges posed by the environment into account. Some bollard types may be more suitable than others:

 

Fixed Bollards 

Fixed bollards might be the most suitable option if:

• You want to permanently stop access to certain parts of your property, or
• You don’t require the ability to lower the bollard. 

For example, fixed driveway bollards or concrete bollards are sturdy options. Plus, they require a less extensive installation process compared to retractable bollards.

 

Removable Bollards 

In areas where occasional access is needed, removable bollards can be a good choice. They can be manually installed and removed from their sockets as required. This minimises the need for excavation and potential water table issues.

 

Automatic Bollards 

Automatic bollards (or telescopic bollards) offer the highest level of convenience. They’re particularly useful for car park or driveway security because they can be operated remotely by authorised users. However, these bollards may not always be the best choice for areas with a high water table. 

The installation process is more complex due to their electric or hydraulic parts. You may require extensive civil works to ensure proper drainage and protect the bollard’s internal components. Optional foundation boxes, with integrated water pumps are also available.

 

Consult with Bollard Experts Like Macs

Navigating the challenges of installing bollards in areas with a high water table can be complex. It’s essential to consult with experienced bollard specialists who can assess your site, recommend the most suitable bollard type, and ensure a proper installation process that addresses water table issues.

At Macs Bollards, we have extensive experience in providing security bollards and barrier systems for a wide range of environments, including those with high water tables. Our team of experts can guide you through the process, from selecting the right bollard type to ensuring a successful installation. Contact us today.