As Dr. Petley noted in his blog post, this looks like a classic planar rock slide where the rock mass failed parallel to the dominant planar discontinuity set. The slide occurred on Highway 70 between […]
ENR’s annual top 500 design firms list for 2017 is out. These rankings are based on revenue for design services in the previous calendar year. Last year I extracted a subset of the list to see rankings of firms that are strong in geotechnical / geological related services, so I decided to do it again this year. I included firms that self-identified as geotechnical firms, as well as engineering firms that I know to have a strong geo emphasis. I’m sure there are some that I missed. I also included some of the major A&E firms that provide these types of services. Accordingly, it’s still a bit subjective on who is included. So here is the list of top Geo-Companies of 2017 (along with their change in ranking relative to 2016):
[Editor] Click through for the rest of the Geo list! [/Editor]
A 20 foot section of a tunnel collapsed at the PUREX facility at the Department of Energy’s Hanford Nuclear Site in Washington State. The PUREX facility was used to extract plutonium for weapons from spent […]
I saw this device (well, a model of it and a presentation) at a recent geotechnical conference and I was very impressed. One of the challenges with the QC of drilled shafts is that you […]
A secondary landslide on Highway 101 north of Legget, California was captured on video at the end of April. The original slide closed the highway and after Caltrans was able to clear it and reopen […]
The International Society of Rock Mechanics (ISRM) has some great lectures posted online. The latest one posted in April is ‘Why Rock Mechanics and Rock Engineering?’ by Professor Emeritus Charles Fairhurst of the University of […]
FORT LUPTON, CO—An unfortunate inlet line break at one of Anadarko Petroleum’s hydraulic fracturing stations in Weld County, Colorado just north of Denver, allowed injection fluid to wash out the end of the pumping station and get beneath the concrete slab foundation causing erosion. The voids created beneath the slabs were from three inches to five inches and left the slab floor uneven. The general contractor for the station, Open Range Services, initially thought to use the legacy method of mudjacking, or pressure grouting: pouring a thick grout of mixed concrete and other aggregates into the void, or backfill, but the “mud” is heavy which can affect the surrounding soil, time consuming, and difficult to apply and clean, and backfilling would have required the costly process of ripping out the slab and replacing it. Instead, they contacted Pro Foundation Technology, based in Kansas City, MO, to learn more about a contemporary technology called “foamjacking” or “polyjacking,” which uses lighter weightgeotechnical polyurethane foam instead of grout.
[Editor] Click through for the rest of the press release from GeoPrac.net sponsor, NCFI Polyurethanes! [/Editor]
After tunneling 9,270 feet under downtown Seattle, the Bertha tunnel boring machine finally broke through at the north portal yesterday. The breakthrough marks a major milestone in the project to replace the seismically deficient SR-99 […]
A good way to begin building a business case for investing in new software and systems is to evaluate the time and cost in carrying out a typical task, such as producing site plans and […]
Bentley will be hosting a webinar at two different times on April 5, at 9 a.m. EDT and 5 p.m. EDT for the new gINT Special Interest Group (SIG). They will focus on a current […]
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