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Rehabilitation of wastewater pipe interior - Uetlibergstrasse - Zürich, Switzerland

Static retrofitting (wet-spray method) for structural enhancement

Rehabilitation of wastewater pipe interior - Uetlibergstrasse - Zürich, Switzerland

Topic 
Rehabilitation of wastewater pipe interior
Object 
Uetlibergstrasse
City 
Zürich
State 
Zürich
Country 
Switzerland
Date 
2014
Duration 
6 months

Situation

The city of Zurich has an extensive walkable wastewater pipe system, which is to be rehabilitated step-by-step over the coming years. The approx. 100-year-old pipe on Uetliberg street is egg-profiled (1000/1500 mm), made of in-situ concrete, and about 350 m long.

Solution

In stages, about 3 cm is grinded off the concrete pipe interior walls using high-pressure water jets. Next, the channel bottom is refurbished with a Kera-Line ceramic plate while the remaining surfaces are reprofiled by wet-spraying abrasion-resistant mortar S&P ARMO-crete w RQ onto the old concrete profile. Positioning the S&P ARMO Power Pump directly at the S&P silo prevents dust-related nuisances in the urban environment.

Material

approx. 250 tons of S&P ARMO-crete w RQ

Image Gallery

  • Pipe interior (concrete substrate) after a layer of concrete has been ground off

  • Completed reprofiling with S&P ARMO-crete w RQ

Service

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Related Products

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Sprayable reinforcement mortars incorporating carbon and glass fibre meshes

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