Berlin Wall type fortification
"Berlin Wall" type fortification” is a support system, consisting of vertically positioned steel profiles – most often IPE, HEA or HEB, installed at a certain interval, usually from 1,0 to 1,5 m, and intermediate fill between them. Steel profiles can be made using different technologies, depending on the geological and structural conditions of the site - by vibro-lapping, pre-drilling and post-installation or a combination of both. The lining can be of wooden planks or mesh-reinforced shotcrete, depending on the needs of the project can be performed on the inner or outer flange (when the supporting structure is built into the future structure) on the profile.
Advantages
✓ Fast execution with minimal risk
✓ Performance when strengthening "on a shield”
✓ Making changes, according to the needs of the site
✓ Possibility to combine with different anchor systems
✓ Possibility of embedding in the building structure and using one-sided formwork
✓ Possibility of multiple solutions when laying waterproofing
✓ Economic efficiency
Necessary conditions
For the realization of a quality and reliable fortification facility it is necessary to have the following conditions:
✓ Cleared and compacted site, including in height 14, m (in transmission lines 20 m) with carrying capacity 350 kN / m2 for access to a specialized chain machine weighing 50 t.
✓ Additional drainage/water lowering in case of high groundwater
✓ Preliminary auger probing or with a pneumatic impactor in difficult geological conditions
✓ Staged excavation of a field with a height of up to 2,50 m for installation of cladding between the piles
✓ Trench depth, compliant with the maximum production lengths of the metal profiles - 14,0 m
