Mechanized Shaft Sinking With VSM: Safe and Resource-Saving Construction of Shafts and Foundations in Urban Surroundings-Video

Video Transcription

Video Summary

Nicola Stefanelli presents Aronnex’s Vertical Shaft Sinking Machine (WSM), developed for shaft construction in difficult conditions such as confined urban sites, high groundwater, permeable ground, and strong rock. The machine excavates underwater, using groundwater to carry spoil through a slurry system to a separation plant. Its boom cuts from the shaft’s center outward, while the shaft lining—precast segments, cast-in-place concrete, or both—is installed as excavation proceeds and becomes the permanent structure. Cables and a lowering unit control the shaft’s descent; sensors help operators monitor alignment and excavation balance. No personnel enter the shaft during construction, and the system can operate with a relatively small, quiet, electric-powered worksite. WSMs have been used for TBM access, stormwater storage, utility infrastructure, underground parking, and offshore foundations. Stefanelli highlights reduced disruption, faster construction, and improved safety compared with conventional methods.

Keywords

Vertical Shaft Sinking Machine

shaft construction

slurry excavation

groundwater management

urban underground infrastructure

construction safety