DE
SWE
Construction of sewers and rainwater treatment plants in Essen
EI-ST consortium partner:
- 2 overlapping bored pile excavation pits, D=12 and 15 m; T=14 m
- 1,600 m of tunnelling using the partial-cut method with compressed air, from DN 2000 (DA 2400) to DN 3800 (DA 4700), using reinforced concrete pipes
- Diaphragm wall excavation pit, D = 1.20 m lamella thickness; 100 m long; 8 m wide and 36 m of lamella embedment, of which 18 m is in marl
Consortium partner Smet Tunneling:
- 1,600 m of AVN tunnelling from DN 1,200 (DA 1,560) to DN 2,800 (DA 3,600) using reinforced concrete pipes
- 246 m of microtunnelling from DN 300 to DN 800
EI-NW:
- 7 excavation pits using the CSM method with diameters of up to 10 m and lamella lengths of up to 19 m; excavation to a depth of 16 m
- Sinking of 8 sinkholes up to 3.60 m in diameter with underwater concrete bases
- Excavation of the SKU to a depth of 18 m
- Installation of double-layer excavation shoring up to HEM 1000
- Sheet piling works for slope stabilisation
- Backfilling of the excavation pit, partly using liquid soil mixed in-house
- Construction of precast shafts, surface works, earthworks, stream culverting, open-cut laying, and entry and exit locks for the tunnelling operations
- 13,600 m³ of reinforced concrete works for structures, carried out in-house and in collaboration with NU
- Disposal of 300,000 m³ of excavated soil from excavation pits and tunnelling operations
- Construction and connection of 4 DN 1000 access shafts; depth up to 14 m, linked to the tunnelling operations
