EN 
DE 
Soil
Versmannkai East, site clearance BF 102-110
Project details
| Period: | 2016 - 2018 |
| Field of activity: | Explosive ordnance clearance |
| Scope of services: | Consultancy services, planning services, tendering, participation in award of contract, construction supervision |
| Short description: | Versmannkai Ost is located in the Elbbrücken neighbourhood of HafenCity. This is currently being developed into a new district with residential and commercial buildings. Building plots 102, 105, 108 and 110 were located in an area of a former waterfront that had not yet been explored. The aim of the work was to check the as yet unprobed construction sites with suspected unexploded bombs down to a depth of -9.5 m above sea level (-15 m below ground level) by means of borehole probing and to obtain clearance. Prior to the exploratory work, existing quay installations (quay plate, concrete beam, sheet piling) had to be demolished in some areas. The sheet piling was only partially removed. The soundings were carried out using a three-axis magnetometer, supplemented by an active method (in this case 4R-EM) and borehole georadar in order to minimise the civil engineering work required for the salvage. Salvage at greater depths was carried out by means of large borehole drilling and the use of divers. The terrain was adjusted by backfilling the excavation pits and modelling to contractually agreed transfer heights. |
