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Technical Tunnelling Components

For all tunnel segment accessories

Technical Tunnelling Components (TTC), designs and manufactures in-house a wide range of plastic components for precast segment connection and grouting.

In-house design facilities allow us to modify any standard product, or design bespoke components to each customer’s individual requirements.

Our products have been used on various projects around the world, especially our award winning Dowelock Alignment System.


TTC brings together the expertise of two established companies, Bosworth Plastics Ltd, and Tunnelling Accessories, to offer excellent service, knowledge, expertise and experience to provide innovative solutions for your tunnelling needs.

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