C671 – Tunnels: Inspection, Assessment and Maintenance

Purchase from the CIRIA website. Also available from CIS.

This guide provides infrastructure owners, consulting engineers, contractors and maintenance managers with guidance on the management, condition appraisal, maintenance and repair of the structural elements of existing infrastructure tunnels, focusing primarily on older infrastructure and certain tunnel types. It is based on a detailed review of published literature and infrastructure owners’ procedures, consultation with experts and practitioners within the field, and case studies demonstrating good practice.