Switzerland - Hagebuch-Wil
| Participants | |
|---|---|
| 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 |
| Tender | |
| 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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