Mag. Dr. Michael Premstaller

Premstaller Geotechnik ZT-GmbHZell am See - Hallein - Traunstein

How many drillings are necessary?

A case study from AUSTRIA

General map

Map of Austria

Aerial view and geomorphology

3 D Ansicht Zeller See von SüdenVorne SalzachtalPfeil Hoferareal

Location of the construction site

Project: two floor underground parking

Lake – dr ink ingwater qual i ty

Water protection no drainage dense excavation pit

short time quick, effective and safe construction

Hotel in operation safe underpinning

Geologic investigation

Geologic data points

expected soil:uniform gravely sand

CPT possible

2 CPT enough

CPT-Profile

Layout of Jet-Grouting and Pile Wall

Cross section

-8,01 m

-12,04 m

Jet-Grouting-Works

Excavation and soilcrete columns

Thank you foryour attention!