Tunnel construction works are designed to have a life span of over 100 years. This means there are high requirements expected from the waterproofing systems. Protection of the supporting construction, secure operation, durable and impediment-free functioning of technical installations are a priority. The waterproofing system must resist chemical and mechanical stresses, during both the operation and construction phases.
A tunnel structure has to be waterproofed either with a drainage system, a waterstop system or with an active control system for highest safety, comprising a double layer membrane and controlled by vacuum. Sikaplan® PVC and TPO sheet membrane systems are designed for long-term durability and ease of application. They include accessories and special solutions for every last complex detail.
Tunnel section joints, connections to transverse galleries and inverts to wall joints, are some of the many places where reliable sealing is required. Sika and Tricosal water stops, Sika Combiflex® and Dilatec® adhesive tapes, SikaSwell® profiles and sealants and SikaFuko® injection hoses allow the design of the correct and practical sealing solution for each and every type of joint in the structure.
Complete tunnel water drainage systems based on channel and selected components for primary -spot wise- water drainage in tunnels and mines, in connection with Shotcrete application.