Cutandcovermetoden

The cut-and-cover method, also known as the 'excavate and bury' method, is a construction technique primarily used for building underground structures such as tunnels, subway lines, and basements. It involves excavating a trench or pit from the surface, constructing the structure within this opening, and then backfilling the area above it to restore the original ground level.

This method is often employed when the depth of the excavation is relatively shallow or when the surface above the structure is not required for immediate use during construction. The process typically begins with excavating the ground to the desired depth. Temporary support systems, such as sheet piling or secant piles, are often installed to prevent the sides of the excavation from collapsing. Once the excavation is complete, the structure, which can be made of concrete or other materials, is built within the trench. This might involve casting concrete walls and slabs in situ or assembling precast elements.

After the structure is finished and any necessary waterproofing or drainage systems are installed, the excavation is backfilled with soil or other suitable material. This backfilling process is usually done in layers, with each layer compacted to ensure stability. Finally, the surface is restored, which could involve repaving roads, landscaping, or rebuilding existing structures. The cut-and-cover method is generally cost-effective for shallow depths and allows for large cross-sectional areas, but it can cause significant disruption to surface activities and traffic.