There is a new player in the ground engineering and specialty geotechnical construction market in North America…well, sort of. Quanta Subsurface is a collection of (at present) 9 specialty contractors all owned by Quanta Services, a publicly traded EPC company specializing in the Electric Power and Oil and Gas industries. Many of these companies have been around for some time in their various markets, firms like Crux Subsurface. With the formation of Quanta Subsurface, it appears that they are looking to grow their footprint in transmission line sector in particular. The company is being run by several Crux Subsurface executives, including Crux President Nick Salisbury. [Source: Read more at QuantaSubsurface. Image: Crux/Quanta Subsurface]
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Rockfall Protection Installation Video
Geovert, a specialty design-build geotechnical contractor in New Zealand and Australia has released a video showing the construction of a challenging rockfall protection project. From their YouTube description:
Stockton Coal Mine is situated on the rugged west coast of New Zealand’s South Island, near Westport. Geovert, a design-build contractor specializing in difficult access rockfall mitigation projects, were retained to provide a turnkey solution combining slope protection and stabilisation measures, to manage the rockfall hazard and protect the surrounding environment with a world class design build rockfall protection solution. The barrier was 1.7 kilometres long and follows a ridgeline escarpment, making this the longest rockfall protection barrier in the southern hemisphere. This was one of the largest and most challenging rockfall construction projects completed to date anywhere in the world.
Click through to see the video.
High altitude foundation construction with Crux
This is an awesome limited access foundation project from Crux Subsurface! They designed and installed micropile foundations for new steel tubular towers to replace old steel latice structures. The high altitude (about 10,000 feet) meant […]
Nicholson Completes Emergency Work on Indiana’s I-65
PITTSBURGH, PA – Nicholson Construction recently completed emergency repair work to an unstable pier supporting a bridge on INDOT’s Interstate 65. These repairs enabled a 37-mile section of the highway’s northbound lanes to be reopened after a four-week closure.
The highway was in the process of being rehabilitated and widened when the pier was damaged by steel piles driven into the water tight ground below it. The pier began to settle and eventually rotated ten inches.
Nicholson developed a design-build solution that used micropiles to transfer the loads to more stable soils and low-mobility grouting to fill voids and densify the upper subsurface layer.
[Editor] Read on to hear more about Nicholson’s fix of this unstable bridge pier. [/Editor]