Hythe Retaining Wall Stabilisation

Requirement

At Hythe, a failing stone retaining wall posed a significant structural risk, especially as plans were underway to construct an extension adjacent to it. Given the importance of ensuring long-term stability, Anchor Systems was tasked with reinforcing the wall using Vulcan Earth Anchors. The project required an effective and minimally invasive solution due to restricted site access and the necessity of working without heavy machinery.

By implementing a tailored foundation support system, the project successfully stabilised the structure, preventing further movement and ensuring the safety of the new development.

The existing stone retaining wall was exhibiting signs of structural failure, raising concerns over its ability to support the surrounding ground. As the homeowner planned an extension that would bring the house right up to the wall, stabilisation became a priority. Without intervention, the weakened structure could pose safety risks and compromise the longevity of the proposed extension.

The primary challenge was to reinforce the wall while adhering to site constraints, which prohibited the use of heavy equipment. This meant that all solutions had to be installed manually, requiring precision and efficiency.

Testing

Before proceeding with the installation of the Vulcan Earth Anchors, standard site testing was conducted. These tests aimed to:

• Evaluate the ground conditions to determine soil resistance

• Verify that the proposed anchor system could withstand the necessary loads

• Ensure compliance with engineering safety standards

Testing results confirmed that the AS-30 Vulcan Earth Anchors would provide the required level of foundation support, meeting load bearing and safety factor requirements

Solution

To stabilise the retaining wall, a total of 10 x AS-30 Vulcan Earth Anchors were installed at a depth of 3 metres. The chosen anchor system included:

• 16mm threaded tendon for secure embedding

• 250x250x10mm pattress plate to distribute load forces

• Wedge-boss, hemi-spherical washer, and 16mm load nut for reinforced stability

Each anchor was engineered to handle a load requirement of 10kN, with a built-in safety factor of 3, ensuring long-term structural integrity​

Given the site’s limitations, the installation process was adapted to use only handheld hydraulic breakers for anchor placement. To apply and test the required loads, a 12T hollow hydraulic ram was used, ensuring compliance with engineering standards​

Result:

Following the installation of the Vulcan Earth Anchors, the retaining wall was successfully reinforced, meeting all performance and load capacity expectations. The wall is now capable of supporting the adjacent development without risk of failure.

Key Outcomes:

• Full stabilisation achieved – Prevented further movement of the wall

• Load capacity requirements met – Achieved required 10kN with a safety factor of 3

• Minimal disruption – Installed manually with no heavy machinery

• Successful completion – No unforeseen challenges or delays​

The project demonstrates the effectiveness of Anchor Systems’ foundation support solutions, particularly in scenarios with limited access or sensitive construction environments. By using Vulcan Earth Anchors, the retaining wall was reinforced quickly and efficiently, providing a robust, long-term solution.