brøndkasse

A brøndkasse, literally translated as "well box" or "well casing," is a structural component used in the construction and maintenance of water wells. Its primary function is to line the borehole, preventing the collapse of the surrounding soil or rock, and to protect the groundwater from surface contamination. This is particularly important in areas with unstable geological formations.

Brøndkasse can be constructed from various materials, including concrete, steel, plastic, or even brick. The choice of material often depends on the depth of the well, the type of soil, and local regulations or best practices. Concrete brøndkasse are common due to their durability and resistance to corrosion, while plastic options offer advantages in terms of weight and ease of installation. Steel brøndkasse are typically used in more demanding environments where high strength is required.

The installation of a brøndkasse involves lowering it into the drilled borehole and then sealing the annular space between the casing and the borehole wall. This sealing process, often referred to as grouting, is critical for preventing the migration of contaminants from the surface or from different aquifer layers into the well water. The top of the brøndkasse is usually extended above ground level to prevent surface water from entering the well and is often covered with a wellhead to provide further protection and access for maintenance. Regular inspection and maintenance of the brøndkasse are essential to ensure the long-term integrity of the well and the quality of the water it provides.