As a complement to the use of steel arches as the primary support, Onix offers Bernold Sheets to be used to prevent collapse and reinforce the ground. This type of sheet can also be used to avoid small detachments within the excavated section.

The Bernold sheet technique consists of placing steel or aluminum panels as lining inside tunnels. These panels are joined together by rubber joints to form a continuous structure that can withstand the pressure of the surrounding soil and ensure the stability of the tunnel.

The main advantage of the Bernold sheet technique is that it allows for the quick and economical construction of small and medium-sized tunnels. In addition, the use of steel or aluminum panels can reduce the size of the necessary excavation, which in turn reduces the cost and construction time.

11. Chapa Bernold 2 1 2


The Bernold sheet lining technique has multiple applications in tunnel construction, including road and railway tunnels, water and sewage tunnels, and mining. It is a fast and cost-effective option for constructing medium-sized tunnels and can withstand hydrostatic pressure while protecting workers from mining hazards

Lining roads and railway tunnels: the Bernold technique is commonly used for lining road and railway tunnels, as it allows for the fast and economical construction of medium-sized tunnels.

Water and sewer tunnels: the Bernold sheet lining technique is also useful for constructing water and sewer tunnels, as it can withstand hydrostatic pressure and protect water and sewer pipes from damage.

Mining tunnels: the Bernold technique is also used in the construction of mining tunnels to protect workers from mining-related hazards, such as rock collapse.


Onix Underground Bernold Sheet Specifications


Bernold sheet is a type of corrugated sheet metal frequently used in tunnelling and mining applications because of its advantages in strength, durability, and ease of installation. Some of the specific advantages of Bernold plate in these applications are the following:

Deformation and breakage resistance: Bernold sheeting is a high-strength steel sheet designed to withstand extreme loads and forces. This makes it particularly suitable for applications where robust and durable protection against collapse or failure is required.

Durability: Bernold sheeting is designed to withstand the rigors of the environment.

Easy installation: Bernold sheeting is easy to install thanks to its corrugated design. The sheets can be placed side by side and joined together using bolts or welding, which reduces installation time and cost.

Flexibility: Bernold sheeting is very flexible, making it ideal for use in tunnels and mines with irregular shapes. It can be easily bent and molded to fit the shape of the rock or terrain.

Erosion protection: Bernold sheeting can also be used to protect against erosion in mining and tunneling applications. By placing the sheeting on the walls or ceiling, rock or soil can be prevented from falling and causing damage or blockages in the tunnel or mine.


  1. Preparation of the sheet base and cleaning and leveling of the terrain
  2. Placement of the sheet in the designated location and fixing it to the existing structure
  3. Molding of the sheet if necessary to fit the shape of the structure or terrain
  4. Fastening the sheet to the existing structure
  5. Sealing the joints between the sheets to prevent the entry of water or air
  6. Testing and maintenance to ensure that it is properly fixed and safe for use