{"id":106435,"date":"2025-09-04T14:42:45","date_gmt":"2025-09-04T12:42:45","guid":{"rendered":"https:\/\/www.maccaferri.com\/uk\/solutions\/final-lining\/"},"modified":"2025-10-27T13:25:38","modified_gmt":"2025-10-27T12:25:38","slug":"final-lining","status":"publish","type":"solution","link":"https:\/\/www.maccaferri.com\/uk\/solutions\/final-lining\/","title":{"rendered":"Final Lining"},"content":{"rendered":"
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The final lining<\/b> is a critical component in underground construction, playing a pivotal role in ensuring the durability and structural strength of the finished structur<\/b>e. It also serves as a base for essential service installations like ventilation, aeration, and lighting. An innovative aspect of this phase is the use of steel fibres<\/b> for fibre-reinforced concrete, which can effectively prevent micro-cracks and sometimes replace traditional reinforcing bars, enhancing the overall integrity and longevity of the construction.
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Beneath the visible final lining lies a layering system that ensures the tunnel’s functionality and safety<\/b>. This system includes waterproofing<\/b>, which is essential for maintaining the tunnel’s structural stability and safety: polymeric geomembranes<\/a> provide extremely low permeability to prevent water ingress and infiltration. Additionally, an underlying layer of protection<\/b> is essential: MacDrain<\/b> is a 2-in-1<\/b> geocomposite <\/a>which protects the waterproofing layer and also functions as a drainage system to remove water from around the excavation profile.
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