Two sewer diversion tunnels are required to facilitate the construction of viaducts into the Birmingham terminus station for HS2. The sewer tunnels will be constructed using pipejacking techniques and launched from a combination of precast concrete caisson sunk shafts and sheet pile cofferdams.
Gall Zeidler Consultants provided design services including preparation of drawings for the pipes, shafts and cofferdams. Ground movement assessment was performed to determine the impact of the construction on Network Rail and the Birmingham Museum Trust Depot Building, and evaluation of ground conditions and Geotechnical Baseline Reports. The tunnel and shaft elements have been modelled using REVIT to facilitate integration with the project model in BIM360.
Birmingham, United Kingdom
2020 – 2022
Sewer Diversion Tunnels
580m (0.36mi) Total Length (Two Diversions)
1.8m (59ft) ID and 2.7m (88.6ft) ID Sewer Pipe
Glaciofluvial deposits, completely weathered and highly weathered mudstone; Groundwater Table Above Tunnels.
Approximately £20 Million (US$27 Million)
Severn Trent Water