Repair,
Bauwerksuntersuchung,
Building repair
Altstadtringtunnel München
to be closed again properly and the prestressing steel had to be protected from further corrosion. The installed tendon is a prestressing steel of the type St145 / 165, Sigma oval, which is prone to stress cracking. When subsequently grouting tendons with prestressing steel at risk of stress cracking using [...] using cement suspension, further cracks can occur in the prestressing steel. The tendons should therefore be grouted with a special resin suitable for this purpose, which permanently prevents both moisture and oxygen from reaching the prestressing steel. To create a compressible space, cladding tube h [...] For the prestressing steel test, the accompanying engineering office had openings made on the ceiling of the Altstadtring tunnel using high pressure water jets. The structural concrete, the cladding tube and the cement glue inside the cladding tube were removed. For the further use of the tunnel, these[...]