The subject of the tendered services is the renewal of the overhead contact line system in Duisburg Kaßlerfeld in the

Course of the reconstruction of the OB-Lehr bridge. Construction project is carried out on behalf of the city of Duisburg.

As part of a detailed planning for the new construction of a high-chain catenary, the ground conditions at the

planned mast locations can be determined. For this purpose, ground investigations (soil soundings and test drilling) must be carried out to determine soil physical properties and explosive ordnance exploratory work in order to

to obtain necessary calculation characteristic values for a necessary and sufficient foundation statics as well as the

Inspection of the subsoil for freedom from explosive ordnance. For this purpose, the surfaces in the area of the planned mast locations are broken up, 2x2 m2 and 1.50m deep. This is followed by drilling work to assess the subsoil in the area of the mast site (sequence of layers, soil conditions, standing rock), with a drilling depth of approx. 7 with the aim of obtaining soil samples and subsequent surface restoration. This is followed by soundings to assess the subsoil for suspected cases of explosive ordnance with a planned probing depth of 7m.