An anchor is a structure consisting of a tendon free length (designed to satisfy overall structural stability) and a restraint (designed to transmit tensile forces to the surrounding ground). According to Eurocode 7 (EC7) – Part 1 , the design pull-out resistance of an anchorage Ra,d must satisfy the following inequality: Pd ≤ Ra,d ,where … Continue reading Ultimate Bond Strength of Anchors in Rock
A major milestone at Klokova tunnel has been reached on June 23rd, as part of IONIA Odos Motorway overall progress, with the breakthrough of the twin tunnel right branch (length: 2,900m approximately). TERNA S.A. engineers tunneled through the final few meters connecting the two segments of the right branch on Thursday afternoon (23/06/2016), after less than 2-years since mobilisation … Continue reading Geosysta at Klokova Tunnel Breakthrough (photos and videos)
Training and professional development have always been integral to operations at Geosysta. It is our priority to keep our team learning new skills and maintain our strong connections with academia and professionals by always trying to share our knowledge in the fields of geotechnical and mining engineering. As part of our constant evolvement, Geosysta participated … Continue reading Geosysta at 12th International Symposium on Landslides (ISL)
Greetings to all Geotechpedia’s fans! First I would like to thank all of you for making Geotechpedia one of the most popular sites on the online world of geotechnical engineering. We have our google analytics reports continuously improving to prove that! Your ideas and needs led us to add new sections in our site such … Continue reading Geotechpedia: A geotechnical portal that is constantly evolving!
In my previous entry regarding the Yeager airport landslide where I hypothesize for a possible shear zone somewhere near the foundation, I got some interesting comments from fellow engineers. In this entry I would like to clarify some issues. The hypothesis made about a shear zone was based on published information regarding intercalation of sandstone … Continue reading Yeager Airport Expansion slide additional comments
Recent news and photographs present the spectacular slide that occurred in the Yeager Airport Expansion Runway 5. The slide occurred in the South slope which was among the highest if not the highest (~74m) reinforced earth slope in the US. The project had received the award of Excellence – TenCate Geosynthetics in 2007 International Achievement … Continue reading What could have gone wrong in Yeager Airport Expansion slide?
This is a very controversial topic in which a straightforward answer is not possible. In this entry I would like to tackle some issues related to our own profession since we are responsiblefor the “acceptable” amount of investigation. Recently I attended the IAEG 2014 (Engineering Geology) conference in Torino. In this conference numerous interesting … Continue reading Geotechnical investigation data, always not enough?
The March / April Geo-Strata was almost entirely dedicated to the GAM (Geotechnical Asset Management) for transportation systems. It was very interesting to see how this concept is evolving in the broader field of Geotechnical Engineering and transportation infrastructures. This Geo-Strata feature is worth reading if you are interested in the future of Asset management … Continue reading Is geotechnical monitoring important?
Every geotechnical engineer knows E. Hoek and his significant contribution to rock mechanics. Here you can find his first on line lecture titled “The Development of Rock Engineering”, you just need to enter your name, e-mail and company and you get the password to view the on line lecture. This lecture provides interesting historical background … Continue reading Development of Rock Engineering and updating EC7
November – December issue of Geo-Strata which is a published forum of the Geo-Institute of the American Society of Civil Engineers (ASCE) featured an article by Patrick C. Lucia, Chairman Emeritus of Geosyntec Consultants, titled “As I See It: Geotechnical Forensic Engineering in Defense of Geotechnical Engineers”. In the article Patrick shares his over 25 … Continue reading Geotechnical engineering standard of care