Construction of sewers by pipe advancing (DN 2600) as well as by open laying (DN 1200 and DN 2000).
The construction site was under the influence of the ICE railroad line Cologne-Minden, which mean that a 4-lane track had to be passed under in coordination with the DB. In the further course of the project, the concrete structures were built, and a section was already prepared for renaturation.

Services:

• Bored pile excavation pits depth up to 9.0 m, diameter upt to 12.0 m, piles DN 1200 (3 pcs)
• Excavation (6,350 m³)
• Sheet pile wall construction (840 m²)
• Conventional shoring (310 m²)
• Inside groundwater drainage at excavation pits (6 pcs)
• Exterior groundwater drainage at excavation pits (3 pcs)
• Reinforced concrete duct DN 1200, open laying (28 m)
• Reinforced concrete duct DN 2000, open laying (40 m)
• Reinforced concrete pipes DN 2600 for jacking (joint venture) (400 m)
• Security measures in the track area through security guards
• Formwork (1,230 m²)
• In-situ concrete (730 m³)
• Reinforcement (48 to)
• Precast concrete shafts, weight 28 tons each with mounted cover (2 pcs)
• Baffle made of stainless steel 1.4571 (34 m)
• Drain-pipe-grid of stainless steel 1.4571 (36 m)
• Sewer clinker installation (375 m²)
• Installation of rock-fill (800 m²)
• Installation of vegetation protection mats (500 m²)
• Explosive ordnance sounding by INN-method (joint venture) (760 m)