Urban Tunnels – Metro Tunnel

Tailored Solutions for Specific Technical Requirements and Construction Methods:

1. Urban traffic tunnels

• Type 1: Waterproofing for Base Slabs, Pump Sumps, and Manholes: Utilizing Pre-applied HDPE membranes, designed to form a continuous, fully-bonded seal with the poured concrete to prevent water tracking.
• Type 2: External Waterproofing for Side Walls, Pump Stations, and Closed Tunnel Roofs: Utilizing Self-adhesive Modified Bitumen membranes reinforced with PE film, post-applied to the finished concrete surfaces.
• Type 3: Waterproofing for Drainage Systems, Internal Tunnel Surfaces, Roadbeds, and Water Tanks: Utilizing an Elastic Acrylic Polymer-Cementitious coating, applied by spray or roller to create a flexible, seamless protective layer.

2. Metro systems

We offer a specialized product portfolio that meets the rigorous technical demands of various construction methods, including Cut-and-Cover, Top-down construction, and TBM (Tunnel Boring Machine) tunneling.

• Type 1: Waterproofing for Station Base Slabs, Launching/Reception Shaft Slabs, and Structural Walls adjacent to Diaphragm Walls: Utilizing Pre-applied HDPE membranes (fully-bonded) or Compartmentalized PVC systems combined with a protective non-woven geotextile layer.
• Type 2: External Waterproofing for Station Walls, Ramp Walls, and Roof Slabs: Utilizing Post-applied Self-adhesive Modified Bitumen membranes with reinforced PE film or PVC membrane systems integrated with protective geotextile layers.