2001
Glasgow & Edinburgh, Scotland
Network Rail
First engineering
Donaldson Associates
Glasgow to Edinburgh Mainline
Pre-Filled Gabions in the quarry
ReadyMac being loaded
Installation in progress
After completion
Challenge
In 2001, prolonged heavy rainfall caused a major landslip at Polmont, leading to the closure of the main rail line between Glasgow and Edinburgh. This critical transport route was shut down due to safety concerns, resulting in severe disruption for commuters and significant financial losses for rail operators. Each day of closure increased operational costs and logistical strain, making rapid remediation essential. The challenge was to stabilise the slope quickly and safely to restore rail services while managing difficult ground and water conditions.
Solution
To address the emergency, Maccaferri Construction partnered with First Engineering, Railtrack’s appointed contractor, and Donaldson Associates to deliver a fast-track design and build solution. The speed of installation was critical, so design and construction activities were carried out simultaneously, allowing immediate progress on site.
Maccaferri utilised its advanced MacSTARS software to accelerate the engineering design of a mass gravity gabion wall in accordance with Eurocode 7. This ensured structural stability while adapting to the complex site conditions, including a high volume of water in the burn.
The engineered solution comprised a 4-metre-high gabion retaining wall extending 16 metres, along with an additional low-height wall of 20 metres. To significantly reduce installation time, pre-filled gabion units known as ReadyMacs were used for the lower courses. These factory-assembled units are designed for durability during transport and lifting, making them ideal for projects with restricted access and challenging environments.
The remainder of the structure was constructed using polymer-coated, hexagonal woven mesh gabions filled on-site with 10–200 mm stone. This method provided both flexibility and strength, particularly suited to the difficult terrain of a deep ravine within a built-up area.
Working around the clock with two rotating teams, Maccaferri completed the project ahead of Railtrack’s deadline. The rapid deployment of ReadyMacs and an efficient construction approach enabled the railway line to reopen on time, minimising disruption and reducing costs for the operator.
Keywords: landslip stabilisation, gabion retaining wall, railway infrastructure repair, slope stabilisation solution, ReadyMacs, rapid construction, erosion control, Maccaferri, rail emergency works, Polmont landslip
Used Products
