Filtering by Subject: Geotechnical Engineering

An interview with ChatGPT: discussing artificial intelligence in teaching, research, and practice

Gianvito Scaringi, Marco Loche

Published: 2023-02-15
Subjects: Engineering Education, Geology, Geotechnical Engineering, Higher Education

This paper examines the potential of using the AI language model ChatGPT in the field of engineering geology. The authors, an engineering geologist and a university teacher, conduct a series of conversations with ChatGPT to explore its capabilities in assisting with research and learning, and its potential implications for scientific publications. The paper also considers the future of human-AI [...]

Physics-Informed Neural Networks Applied to Catastrophic Creeping Landslides

Ahmad Moeineddin, Carolina Segui, Stephan Dueber, et al.

Published: 2023-02-13
Subjects: Computational Engineering, Geotechnical Engineering

In this study, a new paradigm compared to traditional numerical approaches to solve the partial differential equation (PDE) that governs the thermo-poro-mechanical behavior of the shear band of deep-seated landslides, is presented. In particular, we show projections of the temperature inside the shear band as a proxy to estimate catastrophic failure of deep-seated landslides. A deep neural [...]

Linking thermal and rate behavior with fabric and mineralogy of clayey shear zones: Experimental investigation on the El Forn landslide (Andorra)

Carolina Segui, Esperança Tauler, Tomasz Hueckel, et al.

Published: 2022-12-17
Subjects: Civil and Environmental Engineering, Engineering, Geotechnical Engineering

Thermal triaxial tests were carried out on remolded material of core samples of the shear zone of a deep-seated landslide, the El Forn landslide (Andorra). With the thermal triaxial tests, we have obtained thermal and rate sensitivi- ties of the material outside and inside the shear band. Moreover, micro-scale tests were carried out, such as XRPD, SEM-EDS, MicroCT, and plasticity index. The [...]

Quantification of the impact of acidified brine on fracture-matrix transport in a naturally fractured shale using in situ imaging and modeling

Christopher Zahasky, Manju Pharkavi Murugesu, Takeshi Kurotori, et al.

Published: 2022-12-07
Subjects: Geotechnical Engineering, Hydrology

Understanding flow, transport, chemical reactions, and hydro-mechanical processes in fractured geologic materials is key for optimizing a range of subsurface processes including carbon dioxide and hydrogen storage, unconventional energy resource extraction, and geothermal energy recovery. Flow and transport processes in naturally fractured shale rocks have been challenging to characterize due to [...]

python-ags4: A Python library to read, write, and validate AGS4 geodata files

Asitha Senanayake, Roger Chandler, Tony Daly, et al.

Published: 2022-09-21
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Engineering, Geochemistry, Geology, Geophysics and Seismology, Geotechnical Engineering

Data gathered from geotechnical, geoenvironmental, and geophysical investigations can be broadly described as "geodata". The AGS4 data format is one of the most widely used data transmittal formats for geodata and is used across the world. It is a plain text format consisting of multiple tables of comma-separated values, tied together with a robust data schema and a comprehensive suite of [...]

Kathmandu Basin as a local modulator of seismic waves: 2D modelling of nonlinear site response under obliquely incident waves

Elif Oral, Peyman Ayoubi, Jean Paul Ampuero, et al.

Published: 2021-10-15
Subjects: Civil Engineering, Earth Sciences, Geophysics and Seismology, Geotechnical Engineering

The 2015 Mw 7.8 Gorkha, Nepal earthquake is the largest event to have struck the capital city of Kathmandu in recent times. One of its surprising features was the frequency content of the recorded ground motion, exhibiting a notable amplification at low frequencies (< 2 Hz) and a contrasting depletion at higher frequencies. The latter has been partially attributed to the damper behaviour of the [...]

Effects of Cone Penetrometer Testing on Shallow Hydrogeology at a Contaminated Site

Terry C. Hazen, Andrew D. Putt, Erin R. Kelly, et al.

Published: 2021-06-08
Subjects: Environmental Engineering, Geotechnical Engineering, Systems Biology, Terrestrial and Aquatic Ecology

Penetration testing is a popular and instantaneous technique for subsurface mapping, contaminant tracking, and the determination of soil characteristics. While the small footprint and reproducibly of cone penetrometer testing makes it an ideal method for in-situ subsurface investigations at contaminated sites, the effects to local shallow groundwater wells and measurable influence on monitoring [...]

Distributed Acoustic Sensing for Near Surface Imaging from Submarine Telecommunication Cable: Case Study in the Trondheim Fjord

Kittinat Taweesintananon, Martin Landrø, Jan Kristoffer Brenne, et al.

Published: 2021-05-13
Subjects: Geophysics and Seismology, Geotechnical Engineering, Signal Processing, Systems and Communications

Distributed acoustic sensing (DAS) transforms submarine telecommunication cables into densely sampled seismic receivers. To demonstrate DAS applications for seismic imaging, we use an optical cable on the seafloor in the Trondheim Fjord, Norway, to record seismic data generated by a controlled seismic source. The data are simultaneously recorded by a towed hydrophone array and the fiber optic [...]

Microstructural differences between naturally-deposited and laboratory beach sands

Amy Ferrick, Vashan Wright, Michael Manga, et al.

Published: 2021-04-15
Subjects: Civil and Environmental Engineering, Civil Engineering, Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering, Physical Sciences and Mathematics, Sedimentology

The orientation of and contacts between grains of sand reflect the processes that deposit the sands. Grain orientation and contact geometry also influence mechanical properties. Quantifying and understanding sand microstructure thus provide an opportunity to understand depositional processes better and connect microstructure and macroscopic properties. We compare naturally-deposited beach sands [...]

2-D P-SV and SH spectral element modelling of seismic wave propagation in non-linear media with pore-pressure effects

Elif Oral, Celine Gelis, Luis Fabian Bonilla

Published: 2021-01-06
Subjects: Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering

It has long been recognized that the effects of superficial geological layers, or site effects, can play a major role on the seismic ground motion at the free surface. In this study, we compute wave propagation in a 2-D asymmetrical basin considering both soil non-linearity and pore- pressure effects. Equations of elastodynamics of wave propagation are solved using the spectral element method [...]

Spectral element modelling of seismic wave propagation in visco-elastoplastic media including excess-pore pressure development

Elif Oral, Celine Gelis, Luis Fabian Bonilla

Published: 2021-01-06
Subjects: Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering

Numerical modelling of seismic wave propagation, considering soil nonlinearity, has become a major topic in seismic hazard studies when strong shaking is involved under particular soil conditions. Indeed, when strong ground motion propagates in saturated soils, pore pressure is another important parameter to take into account when successive phases of contractive and dilatant soil behaviour are [...]

Coordination numbers in natural beach sand

Vashan Wright, Amy Ferrick, Michael Manga

Published: 2020-12-03
Subjects: Geophysics and Seismology, Geotechnical Engineering, Sedimentology

Coordination number controls elastic moduli, seismic velocity, and force transmission in sands and is thus a critical factor controlling the resistance of sands to deformation. Previous studies quantified relationships between coordination number, porosity, grain size, sphericity, and effective stress in pluviated or modeled sands. Here, we determine if these relationships hold in [...]

Future magnitude 7.5 earthquake offshore Martinique: Spotlight on the main source features controlling ground motion prediction

Elif Oral, Claudio Satriano

Published: 2020-11-18
Subjects: Civil and Environmental Engineering, Geophysics and Seismology, Geotechnical Engineering

The eastern offshore of Martinique is one of the active areas of the Lesser Antilles Subduc tion Zone (LASZ). Although its seismicity is moderate compared to other subduction zones, LASZ is capable of generating a M 7+ interplate earthquake and recent studies and historical events, such as the M8 1839 and M 7-7.5 1946 earthquakes, confirm this possibility. Given the high risk that Martinique can [...]

Laboratory experiments and grain based discrete element numerical simulations investigating the thermo-mechanical behaviour of sandstone

James Woodman, Audrey Ougier-Simonin, Anastasios Stavrou, et al.

Published: 2020-05-30
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geotechnical Engineering, Physical Sciences and Mathematics

Thermo-mechanical loading can occur in numerous engineering geological environments, from both natural and anthropogenic sources. Different minerals and micro-defects in rock cause heterogeneity at a grain scale, affecting the mechanical and thermal properties of the material. Changes in strength and stiffness can occur from exposure to elevated temperatures, with the accumulation of localised [...]


Alexander Prikhodko, Petr Valentinovich Kuzmin, Andrei Bagrianski

Published: 2020-05-25
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering, Physical Sciences and Mathematics

Development and following commercial use of the airborne electromagnetic method based on natural fields in the audio-frequency band (AFMAG) started in late 50s of the last century. After several decades of the development downtime, limitations inherent to the method were resolved in 80s by adapting the tensor analysis, remote reference noise bias removal techniques and computation of the tippers. [...]


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