Construction and Repair of Concrete Tunnels
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Shotcrete Construction Knight Theater Pedestrian Tunnel, Charlotte, North Carolina, USA Several waterproofing systems were considered for the new pedestrian tunnel, including HDPE membrane, PVC membrane, double-bonded spray-applied cementitious membrane and cementitious concrete admixtures. After evaluating the cost and constructability issues of these methods, a combination of two systems were selected to achieve the specified and desired results. It was decided to use Kryton’s Krystol Internal Membrane (KIM) in the structural shotcrete walls and invert concrete slab of the tunnels and then apply a double-bonded spray-applied membrane to the walls. Cast-in-Place Construction Ensenada International Terminal Grain Tunnel, Ensenada, Baja California, Mexico A below grade concrete tunnel to house a belt transportation system and grain silo were constructed using Kryton’s Krystol Internal Membrane (KIM) admixture, Krystol Waterstop System for joints and Krystol Crack Repair System. The port location meant that the tunnel would be in constant contact with sea water and it was essential the tunnel remained water free. Water in the transport tunnel could ruin entire containers worth of valuable grain. Further, salt water and its ability to corrode the steel and structure was also a key factor in the waterproofing design. Precast Construction The new Manukau Police Hub built an underground tunnel between the police hub and the adjacent courthouse. The tunnel was constructed out of fifty precast box culverts with the most sound structural integrity in mind. The contractor selected Kryton’s Krystol Internal Membrane (KIM) as the waterproofing choice based on performance and pricing. All fifty of the precast box culvert segments contained KIM, ensuring that they would be permanently protected from water ingress from the inside out. Manukau Police Hub Tunnel, Manukau City, New Zealand Offices in Canada, USA, UK, Singapore, Barbados, China, India, and Dubai. Plus, over 50 distributors worldwide there is a Kryton distributor near you. CONSTRUCTION & REPAIR OF CERTIFICATE No 05/4217 Find yours today. www.kryton.com Kryton International Inc. Technical Headquarters 1645 East Kent Avenue Vancouver, BC Canada V5P 2S8 Tel: 1.604.324.8280 Fax: 1.604.324.8899 Toll Free: 1.800.267.8280 Email: info@kryton.com CONCRETE TUNNELS

Tunnels can be subjected to heavy traffic and vibration, temperature changes, corrosion damage and freeze thaw cycles which affect the tunnel’s durability. CONSTRUCT WATERTIGHT TUNNELS THAT LAST Proper waterproofing prevents the penetration of moisture and chemicals into the concrete and steel components of the tunnel. Ultimately protecting the durability and structural integrity of the concrete; overall, prolonging the life of the tunnel. Kryton’s Krystol® concrete waterproofing system protects the structural rebar from corrosion and provides a durable, leak-free solution that will last...