World's largest TBM completes first drive

摘要

The TBM being used to build a twin-tube Sparvo road tunnel located between Bologna and Florence, broke through the northbound tunnel of on 25 July. The colossal 15.615m machine was manufactured by Herrenknecht as an EPBM. It was equipped with 76 disc cutters, 216 cutting knives, 24 buckets and one centre cutter.