New era in site investigation data access

Our industry is a bit behind when it comes to new technologies, maybe it is because the scientific progress is moving slowly or not even significantly changing with time. For instance, we’re all still using Terzaghi’s early 1940’s one dimensional consolidation theory or the SPT to conduct our soil investigation. SPT was standardized between 1920 … Continue reading New era in site investigation data access

Geotechnical Risk Management

In our first ever post in Geotechpedia’s blog we tried to answer the most common question among professionals in the Geotechnical engineering industry “Geotechnical Investigation data, always not enough?”. In the specific post, it has been mentioned that “some of us proudly state “I saved so much by reducing the geotechnical investigation” but all this … Continue reading Geotechnical Risk Management

Measuring Permeability and Fluid Storage in the Ground

This is a guest post by Mr. Ian Gray, Managing Director of Sigra Pty Ltd. Towards a technology for shallow testing in civil projects We have found that the equipment and methodology being employed for permeability testing in shallow wells to be, if not inadequate, at the very least misapplied. We propose a cross-disciplinary approach — involving … Continue reading Measuring Permeability and Fluid Storage in the Ground

Estimated Earth Pressures on Cut and Cover Sidewalls

Proposal for estimated Earth Pressures on Cut and Cover Sidewall in rock cuts A common design issue many Geotechnical Engineers have come across in their career is the estimation of earth pressures on a Cut and Cover (C&C) sidewall located close to a rock cut. Usually, a C&C structure is designed and constructed close to … Continue reading Estimated Earth Pressures on Cut and Cover Sidewalls

Geotechpedia Online Survey Questionnaire Results

 “I like to listen. I have learned a great deal from listening carefully. Most people never listen.”                                                                                                                                                               Ernest Hemingway First of all we would like to thank you all for participating in our online survey (16 June – 17 July 2016) regarding Geotechpedia’s future. As we truly value your opinion we made the first step … Continue reading Geotechpedia Online Survey Questionnaire Results

Ultimate Bond Strength of Anchors in Rock

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 [2], 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

Geosysta at Klokova Tunnel Breakthrough (photos and videos)

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)

Geosysta at 12th International Symposium on Landslides (ISL)

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)

Geotechpedia: A geotechnical portal that is constantly evolving!

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!

Yeager airport landslide

Yeager Airport Expansion slide additional comments

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