White PVC Waterproofing Membrane Rolls For Tunnels Plastic Roof Membrane

White Polyvinyl Chloride (PVC) Waterproof Rolls for Tunnels

Product Features

Tunnel-used PVC waterproofing membrane is a special high-m waterproof material customized for high-pressure underground water environments such as tunnels and culverts. With high-polymerization degree polyvinyl chloride resin as core raw material, is added with a high proportion of plasticizers and anti-fatigue additives, matched with a high-strength polyester fiber inner reinforcement layer. Its tensile strength can reach up to 18MPa, elongation at break ≥00%, far higher than the national standard requirements for ordinary PVC membranes. The product's low-temperature bending property can reach -30 without cracks; some custom versions for cold regions can achieve bending without damage at -40℃, and the dimensional stability deviation is ≤1.5% after 6 hours in an 80℃ environment. used for a long time in tunnel environments with high water pressure and frequent micro-deformation of structures, it will have fatigue cracking problems. The membrane's water impermeability pressure can reach up to 1.5MPa, which can resist the infiltration of high-pressure water with a water head of 10 meters. After the joints are hot-air welded, a fully sealed overall waterproof system is formed. Its vapor permeability timely discharge the residual moisture from the initial support layer of the tunnel, avoiding the blistering and delamination of the waterproof layer. The product's tear is ≥200N/mm, which is not easily pierced by sharp gravel on the base surface during construction; its service life can reach more than 50 years in normal underground tunnel environments, fully meeting the requirements for centennial projects of rail transit tunnels.

performance metric

Functions

 This type of waterproof sheet is a designated special waterproof material underground traffic and water delivery projects such as railway tunnels, highway tunnels, urban subway, water diversion culverts, and underground pipe galleries. It is suitable for the full- waterproofing scenario between the primary support and secondary lining of newly excavated tunnels, and can also be used for waterproofing renovation and treatment of old leaking tunnels It can adapt to the long-term frequent settlement deformation of the tunnel structure during operation and repeated fatigue stretching caused by train vibrations. It will not experience brittle fracture and leakage problems like traditional EVA boards, fundamentally solving the most common disease of "water accumulation behind the lining" in tunnel engineering. Meanwhile, the acid and alkali corrosion resistance of the can resist the long-term erosion of corrosive ions in groundwater without performance degradation. integrated hot air welding joint process completely eliminates the leakage hazard caused by poor bonding of lap joints traditional waterproof boards, greatly improving the overall reliability of the tunnel waterproof system, making it a mainstream material currently selected for waterproofing projects of-speed railway tunnels at home and abroad.