Owner RFI Rete Ferroviaria Italiana
Restoration design Eng. Maurizio Schiavo, Padova
Restoration Company D’Adiutorio Appalti e Costruzioni Srl, Montorio al Vomano TE
Waterproofing Drytech Italia, Como
Drytech Restoration 277 m gof movement joints; 133 m of cold joints.
RAILWAY UNDERPASS, LOMBARDY / Drytech carried out the restoration of the Albairate road underpass, made necessary by the lack of impermeability of the existing bentonite system. The structure was restored with DRYflex resin injections in the expansion and casting joints.
DRYflex is a two-component elastic, expanding acrylic resin. It is injected in a liquid state, filling the voids that it meets and taking on their shape. After a few seconds it catalyses, transforming into an expanding gel and sealing the construction details through pressure. The gelling process is also activated in the presence of water, so it is not necessary to isolate the site area with drainage systems. The underpass started to leak a few months after opening.
Drytech intervened from the inside of the structure, without structural demolition or external earthworks and, as mentioned above, without restrictions on the normal rail traffic on the Milan-Vigevano line.
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