Projects: Foundations and Deep Excavations

Overview

Photo of excavation at "Ground Zero," NYC, USA.

Foundations and Deep Excavations

Urban environments require extensive monitoring of the ground around excavations plus the monitoring of the excavation supports themselves, e.g. slurry walls, tiebacks, and cross-lot struts. Many major cities throughout the world have used Geokon instruments in these situations..

Case Histories

Photo of Potsdamer Platz.

Photo of VW Strain Gage welded to Tension Pile.

Photo of battery operated datalogger fixed to buoy for radio transmission.

Potsdamer Platz

Berlin, Germany

The development of the Daimler Benz project around the Potsdamer Platz, in the center of Berlin, required excavations to 18 m over several areas of about 20,000 m² each. A high water table and deep sandy soils required complex excavation procedures, including diaphragm walls and concrete slabs held by tension piles.

At each of three locations, Temperature Sensors, Concrete Embedment Strain Gages and Stressmeters were installed by divers into the concrete slab. Additionally at each location, surface mounted Strain Gages were welded onto piles that were driven from a raft through the water into the ground and grouted. The bundle of instrument cables led to a battery operated Datalogger with radio data transmission. The datalogger was fixed to a buoy floating above the array, and the data transmitted by radio to a computer, for on-line visualization.

For additional information, please contact:

Carlos Fischer at Scanrock, GmbH

Geokon welcomes Case History contributions. If you have a project you would like to be considered for inclusion in our Case History section, please submit details along with 2 or 3 suitable images to the Geokon .

Overview
	Foundations and Deep Excavations Urban environments require extensive monitoring of the ground around excavations plus the monitoring of the excavation supports themselves, e.g. slurry walls, tiebacks, and cross-lot struts. Many major cities throughout the world have used Geokon instruments in these situations..
Case Histories
	Potsdamer Platz Berlin, Germany The development of the Daimler Benz project around the Potsdamer Platz, in the center of Berlin, required excavations to 18 m over several areas of about 20,000 m² each. A high water table and deep sandy soils required complex excavation procedures, including diaphragm walls and concrete slabs held by tension piles. At each of three locations, Temperature Sensors, Concrete Embedment Strain Gages and Stressmeters were installed by divers into the concrete slab. Additionally at each location, surface mounted Strain Gages were welded onto piles that were driven from a raft through the water into the ground and grouted. The bundle of instrument cables led to a battery operated Datalogger with radio data transmission. The datalogger was fixed to a buoy floating above the array, and the data transmitted by radio to a computer, for on-line visualization. For additional information, please contact: Carlos Fischer at Scanrock, GmbH
Geokon welcomes Case History contributions. If you have a project you would like to be considered for inclusion in our Case History section, please submit details along with 2 or 3 suitable images to the Geokon .