All of today's modern tunnels utilize lining
systems with waterproofing membranes. The most widely used configuration, concrete/membrane/concrete, is employed for almost any type of tunnel construction. During
construction the outer layer of concrete holds the tunnel open until the waterproofing membrane can be installed. The inner layer of concrete, which acts as the main
structure of the tunnel, is then placed over the membrane.
Our black or black/white coextruded polyethylene geomembrane (primarily linear low density or a coextruded
polyethylene) provides a smooth, uniform, flexible waterproofing membrane with an excellent puncture, rodent, and micro organism resistance. The result is a dry tunnel, reducing maintenance cost and extending its useful life.