Welding of plastic geomembranes for sealing tunnels

Tunnel geomembranes are utilized in surface mining or deep mining. Once the concrete casing is complete, a plastic sealing system made from HD-PE, PP, PVC or TPO is usually used to provide protection from any penetrating moisture. The individual sheets are laid perpendicular to the direction of the tunnel. Lightweight and flexible welding machines are required for this "overhead welding". Leister offers several suitable machines in the form of the TWINNY, COMET, and UNIDRIVE 500. Details can be welded easily and ergonomically with the hand extruders, hand welding tools, and matching accessories.

• Overlap welding of geomembranes in tunnel construction
• Welding seam quality which can be inspected
• Overhead welding
• Welding of details

• Efficient welding with machines for lap welding, plus "overhead welding"
• Welds with test channel
• Hand extruders for the extrusion welding of connections and details
• Tensiometers for checking the tensile load and integrity
• Recording of data with a USB memory system
• Wide range of hand welding tools and accessories