Switzerland - Hagebuch-Wil

Owner Astra Bundesamt für Straßen, Schweiz
Contractor Main Contractor:
Leonhard Weiss Bau AG, Allmendstr. 5, Regensdorf

Contractor for pipe jacking:
Sersa Group AG, Wilerstr. 57, Schwarzenbach
Location of the Job Site Hagebuch-Wil
Short Description of Job Crossing underneath Highway A1 by using a steel pipe casing OD813 for a plastic sewer line Awadukt PP SN10
Specifications for Tenders 35 m unguided steel pipe jacking for crossing underneath the highway, shallow coverage, demanded accuracy ± 10 cm
Alternative Methods proposed by the Constructor: Guided auger boring with Front Steer FS813 and DTH hammer just to be prepared for hitting bigger stones and destructible obstacles
Described Ground in the Ground Report Refill material, no bigger stones discovered during exploaration, but occurring of bigger stones could not be excluded
Ground conditions
Encountered Soils Refill material, mix soils, bigger stones and destructible obstacles
Depth of Coverage ca. 2,50 m
Accuracy horizontally 3 cm, vertically - 8 cm
Time for Job or Production Rate 6 days, production rate up to 12 m per day in a 10 hours shift
Driving Length 35 m
Any other Specifics Bigger stones and destructible obstacles were hit at the end of the drilling
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