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New website for the Geosystems Group of the Department of Civil and Environmental Engineering of the UC Berkeley
ARGO-E news
25 Nov 2020
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Looking for most recent developments in the micromechanical modelling of Jointed Rocks
Augusto Bopsin Borges Jointed Rocks
15 Nov 2020
Hello everyone! I'm looking for the most recent developments in analytical, numerical and experimental micromechanical modelling of mechanical and flow response of Jointed Rocks....
Read MoreBright Spark Lectures ICSMGE 2021
ISSMGE ICSMGE 2021
09 Nov 2020
The YMPG in collaboration with the Local Organising Committee for the ICSMGE would like to announce the winners of the Bright Spark Lecture Award to two very distinguished engineers:...
Read MoreBest paper award in the 3rd Conference of Arabian Journal of Geosciences
Nazlin Nazir news
12 Nov 2020
Happy to announce that I won the best paper award in the Track 8- Geological Engineering, Geotechnical Engineering of the Springer sponsored 3rd Conference of Arabian Journal of Geosciences held onlin...
Read MoreSurvey - In-situ monitoring and uncertainty in design
Zach Wynne University of Edinburgh
04 Sep 2020
The University of Edinburgh is currently running a survey to understand perceptions of uncertainty in civil & geotechnical engineering and whether this could be reduced by monitoring existing structures.
Read MoreAnnouncing the Publication of the 2020 Geotechnical Business Directory
GeoWorld 2020 GBD
GeoWorld has published its 2020 Geotechnical Business Directory. The directory is published with the support of the International Society for Soil Mechanics and Geotechnical Engineering. This is the sixth year for the Geotechnical Business Directory, the most comprehensive directory in the geotechnical engineering field!
Read MoreGeotechnical Engineering Finalists and Winner in the Year in Infrastructure 2020 Awards
Bentley Systems YII2020
04 Nov 2020
Bentley Systems, Incorporated, the leading global provider of comprehensive software and digital twins services for advancing the design, construction, and operations of infrastructure, announced the finalists and winners in the Year in Infrastructure 2020 Awards program.
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3D FEM: Analyze the soil-structure interactions with Plaxis
Hamzah M. B. Al-Hashemi PLAXIS 3D
12 Sep 2020
Why FEM? Why 3D? The calibrated #FEM is essential to analyze the soil-structure interactions #SSI among the structural elements themselves, the soil, water, loading, and time. It is also true that mos...
Read MoreIssue 3 of Volume 5 of the Case Histories Journal Published
International Journal of Geoengineering Case Histories news
19 Nov 2020
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Medicane Ianos: Post-Event Geotechnical Extreme Events Reconnaissance
George Zalachoris GEER Ianos 2020
10 Nov 2020
Mediterranean tropical-like cyclones, often referred to as medicanes (a portmanteau of Mediterranean hurricanes) are meteorological phenomena observed over the Mediterranean Sea ...
Read More30th Annual Mueser Rutledge Memorial Lecture
Adda Athanasopoulos-Zekkos news
31 Oct 2020
Honored to deliver the 30th Annual Mueser Rutledge Memorial Lecture on "Liquefaction of Gravelly Soil and the Impact on Critical Infrastructure"
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Geotechnical Solutions for Roads and Highways
Bentley Systems FREE EBOOK
10 Nov 2020
Our solutions cover a BROAD range of projects. Here are some of them: Embankments, Landslide analysis, Tunnels, Bearing capacity analysis. What else? Download our FREE eBook to find out MORE: https://...
Read MorePapers for 2015 International Symposium on Field Measurements in Geomechanics are now available to download
ISSMGE ISSMGE TC220
20 Nov 2020
The proceedings of the 9th International Symposium on Field Measurements in Geomechanics are now available to download from the Australian Centre for Geomechanics’ website. Vis...
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Powerful M 7.0 earthquake struck Greece and Turkey: At least 60 casualties
Geoengineer.org news
03 Nov 2020
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Discover our data analysis on how American geotechs felt COVID19 impacts their business!
ARGO-E news
02 Nov 2020
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Improving the geotechnical properties of high expansive clay using limestone powder
Younis Alshkane paper
14 Sep 2020
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Interface in PLAXIS 3D
Q&A
Dinesh K. Malviya
Post Your Answer
- 29 Sep 2020
What is the effect of providing INTERFACE while simulating a model in PLAXIS 3D, what are the significance of POSITIVE INTERFACE and NEGATIVE INTERFACE ?
Post Your Answer
Answers
Micha Van der Sloot
- 26 Jul 2021
Hi Dinesh
For interfaces in PLAXIS, the notation of a positive or negative interface does not have any impact on the mechanical behavior. It is a notation to tell at which side of the surface the interface between the adjacent soil and this surface is located.
The positive side is derived from the local axis of the surface. Axis 1 and -2 are in-plane exes, while axis 3 is perpendicular to the surface. Using the right-hand rule for the winding, you can determine the positive side of the surface, and so here is also the location of the positive interface. For the mechanical or groundwater flow behavior, the name does not matter, as that the behavior iscontrolled by the mechanical properties (stiffness, strength, and the associated Rinter value) and the conductivity values.
So, visually check if the interface you want to use is on the correct side, especially when you want to define an interface on only one side.
A more detailed description of the interfaces can be found here:
Kind regards,
Micha van der Sloot
Bentley Systems, Geotechnical | PLAXIS
Base friction on Perched Piles
Q&A
Someone
Post Your Answer
- 07 Sep 2020
Hi, We have a site near the coast with about 1m of sand on top of sandstone: Class V {c= 35 MPa, ϕ = 29 (1m to 2m deep) and Class IV (2m to 3m deep) and Class III (3m to atleast 7m)
As the sand needs to be retained, I am proposing a double cantilevered perched 300 diameter pile socketed into the Class IV sandstone. Meaning the pile is about 2.5m to 3m deep and only the first 600mm to 1m is in sand and the rest in sandstone.
The question that I have is wether we can avoid an anchor at the toe by use of skin friction of the toe (basically area of 300 diameter circular pile).
Would appreciate some guidance on calculation of the base friction (in liu of additional tie back).
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Answers
Geotechnical investigation Guideline for Onshore Gas Pipeline
Q&A
Sidney Mougueret De Abreu
Post Your Answer
- 04 Nov 2020
Hi everyone, Im involved in some Gas pipeline projects, and I'm looking for good and reliable material related to geotechnical investigation for Gas Pipelines and considerations for the pipeline alignment. Do have any material or reference to share?
Thank you
Post Your Answer
Answers
Heinrich K Heinz
- 30 Nov 2020
Hello Sidney,
I am not aware of any single reference that would cover the entire topic. ASCE published a Manual on Pipeline Crossings years ago (1996) that had some good guidelines for HDD. More recently, MONESS RIZKALLA AND RODNEY READ published a book titled PIPELINE GEOHAZARDS: PLANNING, DESIGN, CONSTRUCTION AND OPERATIONS (ASME Press Books, New York 2018 I think - but note this is an expensive book). Other than this I think you will need to look for individual papers and build up your own collection. Good luck!
Heinrich Heinz (Calgary, Canada)
PS If you send me an email I will try to send you a couple papers: hheinzATthurber.ca
Sidney Mougueret De Abreu
- 07 Jan 2021
Dear Heinrich
Thank you very much for you kind email
I will look for the information that you mentioned and follow your advice
Best regards and Happy 2021 for you and your family
Sidney
SIG Workshop: Geotechnical Information - OpenGround Cloud, Creating Site Plans and Quick Sections in Template Studio
Bentley Systems OpenGround Cloud
20 Nov 2020
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Geotechnical Design Challenge - Social Event
Lucy Wu ISSMGE YMPG
03 Nov 2020
Come discuss your strategies and unique design situations with geotechnics colleagues around the world. Mingle and network with your fellow engineers! There are 3 sessions at different days and times. You are welcome to come to any or all of them!
Read MoreThe Year in Infrastructure 2020: ACCELERATE - Webinar Series
Bentley Systems YII 2020
22 Oct 2020
The latest Bentley offering in solution training and information sharing continues to expand for 2020 with more product offerings presented in a live, virtual setting with live Q&A from Bentley's technical product experts.
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