System and method for waterproofing railway structures

A protective waterproofing structure for a transportation structure, the waterproofing structure comprising:

• a waterproof membrane configured to be applied over a bed of the transportation structure;
• and
• a layered membrane protection structure configured to protect the waterproof membrane, the layered membrane protection structure comprising a plurality of membrane protection layers comprising:
• a first layer having a first surface area, the first layer applied over the waterproof membrane;
• and
• a second layer having a second surface area that is smaller than the first surface area, the second layer applied over the first layer and configured to transition to the first layer along an edge;
• wherein each layer of the plurality of membrane protection layers is configured to provide a uniform non-porous layer and comprises a single elastomeric material excluding a filler material, and the edge forms a slope along a perimeter of the second surface to enable flow of water over the layered membrane protection structure.

A method for waterproofing a railway structure, comprising:

• applying a waterproof membrane over a bed of the railway structure;
• applying a first layer of a layered membrane protection structure over the waterproof membrane;
• and
• applying a second layer of the layered membrane protection structure over the first layer such that the second layer comprises a surface area that is smaller than the surface area of the first layer, and the second layer forms a sloped tapered edge along a perimeter of the second layer to transition to the first layer;
• wherein each layer of the layered membrane protection structure comprises only an elastomeric fluid material, the elastomeric fluid material configured to cure to provide protection over the waterproof membrane, and the edge forms a slope along a perimeter of the second surface to enable flow of water over the layered membrane protection structure.