Hedgehog (foundation in)
The so-called "hedgehog foundations", whose name comes from their arrangement comparable to the peaks of these animals, are structurally very efficient. Initially designed by the Romans, this architecture aimed to prevent water infiltration by capillarity, while ensuring the structural function of the pavement foundation.
Although very resistant, hedgehog structures have a weak point: the fact of milling or micro-milling them (even on the thinnest thickness) makes the entire structure faulty and therefore to replace. Pavement reinforcement projects with these structures are then long and expensive projects, often requiring the complete resurfacing of the pavement for refurbishment.
In order to reinforce a hedgehog road, it is therefore preferable to work in thin layers, so as not to alter the present structure. Especially since the asphalt layers present tend to be relatively thin (due to the high resistance of the hedgehog). Texgrid SAMI CV 200 and TEXGRID SAMI GIRO solutions have proven to be very effective in reinforcing road structures with a hedgehog foundation layer.
Swiss reinforcement company