ABSTRACT
Tunnels for the new Genoa bypass motorway system will pass through formations that potentially contain asbestos. The plan for disposing of such material is to confine it within the area of the seaport, by constructing a dedicated structure (in the form of sedimentation beds). An innovative solution has been adopted for transporting this material from the tunnel excavations to the sedimentation beds. The paper describes the rock formations where an asbestos risk exists, assesses the volume of material to be disposed of, describes the technology on which project is based - a pipeline that transports solid material mixed with bentonite sludge - and outlines the most important characteristics of the route for the line, which passes through built-up areas. Finally a description is given of the separation plant foreseen at the seaward end of the system, so that the bentonite fluid can be recovered and reused within a closed circuit.
