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 limited construction season window, and challenges with the size of helicopter needed for loads. They also provided an innovative steel cap design to the micropiles, thereby avoiding the need to bring in additional concrete and rebar for a traditional micropile cap. Check out the excellent video below. [Source: Read more about the project at Crux Subsurface. Image: Crux]
I gave a presentation recently on a monthly webinar for URETEK Holdings, one of the licensed affiliates (installers) of products by GeoPrac sponsor, URETEK ICR. The topic was Geotechnial Aspects of Polyurethane Grouting. I gave my perspective on some of the benefits of polyurethane grouting, the challenges in geotechnical characterization of the improvements to the soil after grouting, and some unique applications of the technology people are currently using and could potentially use in the future. If you have time to check it out, let me know your thoughts!
GeoPrac sponsor Moretrench is a specialty geotechnical contractor known for their expertise with a variety of geotechnical construction methods. But they are probably best known for their niche work with ground freezing technology. Popular Mechanics Magazine recently did a story on Moretrench's ground freezing work at the Washington D.C. First Street Tunnels project. The ground freezing allowed three vertical access shafts and four deep adits to be excavated in the dry using the frozen ground support. [Source: Read more abot this interesting technology and project from Moretrench. Image: Moretrench]
The 2015 Karl Terzaghi award was presented by Donald A. Bruce, Ph.D., D.GE, C.Eng., L.G., L.E.G., President, Geosystems, L.P. at the Geo-Institute's 2015 Geo-Congress Conference. The Geo-Institute has generously made his lecture available to all of us on their YouTube Channel, so be sure and subscribe. From his abstract:
In historic literature, there is the "Great Man" theory, whereby history is reflected in the biographies of preeminent characters. In the more theoretical and academic branches of specialty geotechnical engineering, the theory holds true, with, of course, Professor Terzaghi one of the heroic great men â€“ a researcher, problem solver, and inspiration sans pareil. In contrast, in the branch of specialty geotechnical construction, technological advances occur principally through "Great Leaps" as opposed to steady and progressive evolution.
Six criteria must be satisfied in support of awarding "Great Leap" status, beginning with a project-specific challenge of unprecedented scope or complexity, and ending with a legacy document detailing and codifying the leap. These steps are illustrated by reference to developments in drilling and grouting; cutoffs for dams; deep mixing; and micropiles, all techniques in which the author has been intimately involved throughout his professional career as a researcher, contractor, educator, and consultant.
Here are the top 50 GeoPrac content items of the year based on your clicks. They are sorted by hits/day to not bias the items published towards the beginning of the year. Thanks to all of my visitors for spending some of your valuable time getting your news from GeoPrac. I know everyone is busy, so I appreciate it very much!
You know how it feels good to clean off your desk and have a fresh start? I've collected a number of articles over the past 6 months that I didn't get a chance to blog about. As we move rapidly towards 2016, I wanted to start with a clean slate. There are certainly some gems in here! Hopefully you have some time off over the holidays, and maybe you check this list twice with a drink in hand!
I’m pleased to announce that I will be a guest speaker at the monthly webinar of URETEK Holdings, an affiliate of GeoPrac sponsor URETEK ICR. I will be presenting on Geotechnical Aspects of Polyurethane Grout, representing Golder Associates Inc., my day-job employer. The webinar is free and open to anyone interested until the spots fill up.
The presentation will be on Friday, December 11, 2015 from 11am – 12pm EST. Please be sure to register for this webinar before it fills up. I hope that what I discuss will be useful to owners and engineers who are considering using or specifying URETEK products on their project. Thanks!
LogitEasy provides a web-based solution for logging boreholes and wells. You can send them scanned paper logs, or use their electronic form on a PC or iPad to submit the data to them. For a flat fee per log, they will prepare electronic logs in gINT, LogPlot, or EnviroInsite (well log) formats and submit report-ready PDF logs and/or electronic data files. They are currently offering a promotion through the end of 2015. When you pre-purchase 99 logs, you get an iPad Air 2, a LifeProof rugged case, a mobile internet SIM kit, and a $100 mobile internet card.
SAN DIEGO, California – Kleinfelder announced that President and Chief Executive Officer Bill Siegel has resigned, effective immediately, to pursue other interests. The Board of Directors has appointed Kevin Pottmeyer as interim CEO while the Board of Director’s conducts a search for a new Chief Executive Officer.
“Bill has accomplished a great deal for our company in his time with us,” says Rodger Johnson chair of Kleinfelder’s Board of Directors. “We thank him for his commitment, service and leadership.”
Siegel adds, “I’m proud of the progress we’ve made in the last 7 years to transform our business. We are at a point in the lifecycle of the company to take our business to the next level and deliver on our 2020 objectives. I greatly value the relationships and experiences realized over my nearly 30 years with the firm and look forward to applying this experience to the next chapters in my professional career and life.”
In the interim, Kevin Pottmeyer, Senior Vice President and Chief Strategy Officer, will lead the company during the transition. Pottmeyer says, “We are financially strong and leading the engineering consulting market in many areas of our business. As we work through this transition, I will continue our focus on meeting current year goals, work with the executive team to prepare our FY17 plan and help lead the search committee for our next Kleinfelder CEO. We will begin immediately to identify CEO candidates and expects to hire a new leader as soon as practically possible.
[Editor] Click through for more about Kleinfelder [/Editor]
OLATHE, Kan. – Terracon, a leading provider of environmental, facilities, geotechnical, and materials engineering services, is pleased to announce the acquisition of NORCAL Geophysical Consultants, Inc. of Sonoma County, Calif. Terracon is retaining NORCAL’s 11 employees.
Founded in 1983, NORCAL offers geophysical technologies in support of geologic, groundwater, environmental, and engineering investigations. NORCAL’s capabilities, including their unique geophysical expertise, complement Terracon’s existing services and broaden the service offerings for clients across the country.
[Editor] Click through for the rest of the press release from Terracon [/Editor]
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]
Moretrench is very pleased to announce that company President and CEO Arthur B. Corwin, P.E. has been recognized by his fellow Moles with the 2016 Member Award for Outstanding Achievement in Construction, the organization’s top honor. The presentation will take place at the annual awards dinner to be held on January 27, 2016 at the New York Hilton.
Mr. Corwin joined specialty geotechnical contractor Moretrench in 1978 and has dedicated his entire career to the growth of the company, serving in various engineering and executive capacities including Chief Engineer, Executive Vice President, and Chief Operating Officer. He was elected to the Board of Directors in 1988, appointed President and Chief Operating Officer in 2003, Chief Executive Officer in 2007, and Chairman of the Board in 2010.
In addition to providing the dynamic leadership that has placed Moretrench in the forefront of the industry, Mr. Corwin is Treasurer of the General Contractors Association of New York , serves on the Board of Associated Construction Contractors of New Jersey, and sits on the Industrial Advisory Committee at Columbia University.