TUNNEL BACKFILLING METHOD

摘要

The present invention concerns a method of tunnel backfilling in which hydraulic back-filling material is filled into a cavity between formwork material and the surrounding geological formation, said hydraulic backfilling material contains the components a) hydraulic binder; b) a stabilizer selected from the group of polysaccharides, polysaccharide derivatives, polyvinyl alcohol and / or poly(meth)acrylamides; c) a water reducing agent and d) water, so that the ratio water to hydraulic binder VWB is between 0,2 and 1.