What is sprayed waterproofing membrane in Tunnelling?

 

Written By - Structural-india

Sprayed waterproofing membrane is a concrete reinforced membrane used in tunnelling. It’s made from a thin, flexible polyurethane film, often black in colour. It’s often used as emergency watertighting in construction projects, where it’s sprayed on the soil or concrete footings where the foundations will be laid. When the foundations are in place, workers use hoses and pumps to lift the membrane and water-seal the tunnel. When completed, the tunnel is pressure-tested to ensure it’s watertight Best Tunnel waterproofing Service In India .

What is sprayed waterproofing membrane in Tunnelling? How does it work?

What is sprayed waterproofing membrane in Tunnelling?

Similar to laying a floor in tunnelling, you’ll need to cover the tunnel with waterproofing membrane to make it watertight. This time, though, the membrane will run along the full depth of the tunnel. After the foundation is in place and the tunnel is pressure-tested, workers will start the process of “spraying” the waterproofing membrane. It’s important to note that this is not a crawlable tunnel.

How does sprayed waterproofing membrane in Tunnelling work?

When workers begin the process of laying the concrete foundation for a new tunnel, they’ll sprinkle the surface of the earth with a water-repellent material such as sand or earthworms. This “finishing” process keeps the water from seeping back into the earth through the surrounding soil. Once the finishing process is complete, workers will use a variety of tools and equipment to apply a thin polyurethane film over the top of the soil in the area where the concrete will go.

When should you use sprayed waterproofing membrane in Tunnelling?

When you’re planning on excavating dirt or sand to make way for a road, you’ll need to apply waterproofing membrane to the soil and footings where the concrete will be laid. This type of covering also protects homes and other structures below from flooding. In fact, every time there’s heavy rain in one area, that same waterproofing material is typically exposed somewhere else in the vicinity so that no one is left without water-proofing. What is sprayed waterproofing membrane in Tunnelling? How does it work?

What is sprayed waterproofing membrane in Tunnelling?

Similar to laying a floor in tunnelling, you’ll need to cover the tunnel with waterproofing membrane to make it watertight. This time, though, the membrane will run along the full depth of the tunnel. After the foundation is in place and the tunnel is pressure-tested, workers will start the process of “spraying” the waterproofing membrane. It’s important to note that this is not a crawlable tunnel.

How does sprayed waterproofing membrane in Tunnelling work?

When workers begin the process of laying the concrete foundation for a new tunnel, they’ll sprinkle the surface of the earth with a water-repellent material such as sand or earthworms. This “finishing” process keeps the water from seeping back into the earth through the surrounding soil. Once the finishing process is complete, workers will use a variety of tools and equipment to apply a thin polyurethane film over the top of the soil in the area where the concrete will go.

Final words: Should you Apply Sprayed Waterproofing Membrane In Tunnelling?

Whenever possible, you should apply waterproofing membrane to the surface of the earth where you plan to make deep holes in the ground. This is to prevent water from seeping back into the earth through the boring or laying of the ground. But when the earth is saturated with water, it will seep through any structure you make in the ground, including the membrane. So, if you’re planning on building a bridge or tunnel, you should apply a waterproofing membrane to the underside of the bridge or tunnel so that water can’t reach the soil below.

As with almost everything in construction, the benefits of applying sprayed waterproofing membrane in tunnelling far outweigh the costs. In fact, applying a layer of this membrane to the ground after the foundation for a new building or structure has been laid can prevent major flooding. And if you’re not planning on adding to the existing ground, that same layer of waterproofing material can be used as an insurance policy against any future flooding.

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