jääseinien

Jääseinien, also known as ice walls, are a construction technique used to create a barrier of ice within the ground. This method is often employed in civil engineering and geotechnical applications to stabilize soil, control groundwater, or prevent the movement of contaminants. The process involves freezing the soil to a temperature below its freezing point, typically around -20°C, using a network of pipes filled with a refrigerated brine solution. The frozen soil forms a solid barrier that can withstand significant loads and pressures.

Ice walls are particularly useful in urban areas where space is limited and traditional excavation methods are impractical. They can be used to create underground structures, such as tunnels and basements, without the need for extensive excavation. Additionally, ice walls can be used to contain and treat contaminated soil by preventing the spread of pollutants.

The construction of an ice wall typically involves several stages. First, a grid of boreholes is drilled into the ground to the desired depth. Then, pipes are inserted into the boreholes and connected to a refrigeration system. The brine solution is circulated through the pipes, causing the surrounding soil to freeze. Once the desired thickness and extent of the ice wall are achieved, the refrigeration system is maintained to keep the ice wall stable.

Ice walls have several advantages, including minimal disturbance to the surrounding environment, reduced construction time, and the ability to create complex underground structures. However, they also have some limitations, such as the need for a stable and consistent soil temperature, the potential for thermal damage to nearby structures, and the requirement for a reliable refrigeration system.

In summary, jääseinien, or ice walls, are a specialized construction technique that utilizes the freezing of soil to create a stable barrier. They are particularly useful in urban environments and for containing contaminated soil, but they also have specific requirements and limitations.