Tag Archives: monitoring

Tunnel Monitoring from Above

UAV digital monitoring delivers significant benefits as part of a major German tunneling construction project. The German city of Karlsruhe plays a decisive role in transport planning in the southwest of that country, with more than 300,000 inhabitants, 160,000 vehicles in the main part of the city, and 190 million train passengers every year. Highway...

Monitoring a Historic Bridge Replacement

A survey manager describes how monitoring improved construction processes for the replacement of an 85-year-old bridge connecting Illinois and Iowa. The Savanna-Sabula truss bridge added to the National Register of Historic Places in 1999, carried passengers along U.S. 52 and Illinois 64 over the Mississippi River, connecting the towns of Savanna, Illinois, and Sabula, Iowa....

A portion of a roadway that’s subject to flooding was scanned to perform drainage analysis as well as to map the existing conditions.

Prepping for El Niño

Above: A portion of a roadway that’s subject to flooding was scanned to perform drainage analysis as well as to map the existing conditions. As the severity of weather increases, so do the benefits of high-definition laser scanning for asset management and damage analysis. Editor’s note: Improvements in, and availability of, tools and resources for precise...

For this project we chose a Carl Zeiss Ni2 level made in the 1960s.

Quarry Monitoring

In Slovenia, a team monitored slope stability in an open-pit quarry using a classic, optical precise level and Invar rod.  Editor’s note: Cost-benefit analysis dictates that, for open-pit mines and quarries, steep slopes allow for the most efficient extraction of resources but at an increased risk of slope failures. This adapted paper outlines an example...