Method for renovation of transport duct located underground, comprises use of old duct for accommodation of rods

摘要

The rear unit (15,16,17) of a linear rod drive aggregate is positioned inside the vertical shaft (1) which has two openings (2) for the duct and a trough channel (3) at the bottom. The part of the renovation unit forming the center of gravity is located in the already existing duct. The rods (5,6) and the drive unit are interconnected with pawl couplings and accommodated inside a casing tube (9) fitted with a shield (11) serving as an abutment.