RVNL and L&T faced significant challenges in identifying a reliable waterproofing solution with a 100-year of lifespan for the tunnels in Package 4 of the Rishikesh–Karnaprayag Railway project. 

Despite extensive efforts, no other provider was able to deliver a solution that met the technical and performance requirements of this critical infrastructure. 

Recognizing the complexity of the project, we proposed an innovative and robust waterproofing system tailored to their specific needs. Our solution incorporated a state-of-the-art PVC membrane designed to have a lifespan of 100 years, ensuring long-term durability and reliability. This approach not only addressed their concerns but also instilled confidence in our capabilities, leading RVNL and L&T to entrust us with the waterproofing responsibilities for Package 4 Tunnel. 

This milestone highlights our commitment to engineering excellence, problem-solving, and providing customized solutions for challenging projects. 

We provided RVNL and L&T with a Pressure Release Waterproofing System specifically designed for tunnel construction. The system comprises: 

• PVC Membrane (Mirai WPM, 2.0 mm thick): A robust waterproofing layer offering long-lasting protection against water ingress and structural deterioration. 
• Geotextile (MIRAI GTX500, 500 GSM): A high-strength, non-woven polypropylene geotextile that enhances drainage and protects the membrane from damage during installation and operation. 

PVC membrane waterproofing is particularly effective in tunnels constructed using methods like NATM (New Austrian Tunnelling Method), which often encounter high-pressure aquifers. These membranes act as barriers against water intrusion, preventing corrosion and deterioration, ensuring long-term durability.