RenoMesh

Network Rail undertook planned rail embankment maintenance on the westbound Worcester to Hereford line near Bransford Court Lane, Worcestershire. Following devegetation works, the embankment became vulnerable to burrowing animals such as rabbits, badgers, and other mammals. These animals can tunnel into the embankment core, creating voids that compromise structural stability and increase the risk of failure. A major concern was the impact of stormwater infiltration. Animal burrows act as channels for water ingress, allowing rainwater to penetrate deep into the embankment and weaken its internal structure. Over time, this can lead to erosion, instability, and costly maintenance issues. To address these risks, Network Rail required a durable anti-burrowing solution that would protect the embankment while maintaining an environmentally sensitive design. The system needed to prevent animal access without restricting the re-establishment of vegetation, ensuring both structural performance and ecological integration.

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The East West Rail Alliance (EWRA) is a major UK rail infrastructure project aimed at reinstating and upgrading the historic Varsity railway line to connect Oxford and Cambridge via Bicester, Milton Keynes, and Bedford, creating a strategic east–west rail link that avoids London. Spanning a long distance through rural countryside, the project faces a range of environmental and geotechnical challenges. One of the most critical issues encountered was the presence of badgers and other burrowing animals along the rail corridor. Badgers are highly effective diggers, creating extensive underground sett networks that can extend beneath railway embankments. These burrows pose a serious risk to rail infrastructure stability. Excavation beneath embankments can lead to ground weakening, potential slope failure, and, in extreme cases, collapse. Furthermore, the interconnected tunnels allow water ingress deep into the embankment, accelerating erosion and increasing maintenance requirements. This combination of structural instability and drainage issues can result in operational delays, safety concerns, and increased lifecycle costs for the railway. A durable, environmentally sensitive, and effective anti-burrowing solution was required to protect the railway embankments from ongoing wildlife activity while maintaining ecological balance.

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Network Rail is delivering a record £1. 25 billion investment programme to upgrade rail infrastructure across Kent and South East London. This includes improvements to track, signalling systems, embankments, structures, stations, and depots, all aimed at improving passenger journeys and reducing delays. A critical part of this programme focuses on railway embankment stabilisation to minimise disruption caused by landslips along key routes. Due to the extensive geographical coverage of the network, environmental and geotechnical challenges have become a major concern. One of the most significant issues is burrowing animals damaging railway embankments. Species such as rabbits, badgers, and other mammals can tunnel into embankments, weakening their structural integrity. These burrows create direct pathways for water ingress, allowing stormwater runoff to penetrate the embankment core. Over time, this leads to internal erosion, reduced soil stability, and an increased risk of embankment failure and rail service disruption. At Edenbridge, this issue was particularly critical. The project required the embankment to be reshaped and revegetated for slope stabilisation and environmental integration. However, without effective protection, the restored slopes remained vulnerable to renewed animal activity. Network Rail, therefore, required a durable anti-burrowing solution that could prevent wildlife intrusion while maintaining ecological compatibility and supporting vegetation growth.

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