Preprints

Filtering by Subject: Geotechnical Engineering

Simulating Electropulse Fracture of Granitic Rock

Stuart Duncan Christopher Walsh, Daniel Vogler

Published: 2019-11-22
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geology, Geotechnical Engineering, Mining Engineering, Physical Sciences and Mathematics

Electropulse treatments employ a series of high-voltage discharges to break rock into small fragments. As these methods are particularly suited to fracturing hard brittle rocks, electropulse treatments can serve to enhance or substitute for more traditional mechanical approaches to drilling and processing of these materials. Nevertheless, while these treatments have the potential to improve [...]

Does a damaged fault zone mitigate the near-field landslide risk during supershear earthquakes?—Application to the 2018 magnitude 7.5 Palu earthquake.

Elif Oral, Huihui Weng, Jean-Paul Ampuero

Published: 2019-10-03
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geotechnical Engineering, Physical Sciences and Mathematics

The impact of earthquakes can be severely aggravated by cascading secondary hazards. The 2018 Mw 7.5 Palu, Indonesia earthquake led to devastating tsunamis and landslides, while triggered submarine landslides possibly contributed substantially to generate the tsunami. The rupture was supershear over most of its length, but its speed was unexpectedly low, between the S-wave velocity Vs and [...]

Global resource potential of seasonal pumped-storage

Julian Hunt, Edward Byers, Yoshihide Wada, et al.

Published: 2019-06-20
Subjects: Civil and Environmental Engineering, Engineering, Geotechnical Engineering, Hydraulic Engineering

The risk of seasonal mismatches between electricity supply and demand is increasing due to expanded use of wind, solar and hydropower resources. Power system planners are thus in search of low-cost seasonal energy storage options. Seasonal Pumped-Storage (SPS) can provide short, medium and long-term energy storage at a relatively low-cost and provides co-benefits in the form of freshwater storage [...]

Technical note: Limitations on the use of space borne differential SAR interferometry for systematic monitoring and failure forecast of alpine landslides

Andrea Manconi

Published: 2019-06-16
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Engineering, Geology, Geotechnical Engineering, Physical Sciences and Mathematics

Recent advances on satellite geodesy have boosted our capabilities to map and monitor landslides globally with unprecedented resolutions. In this scenario, differential interferometry of space borne synthetic aperture radar imagery (DInSAR) plays a major role in identifying surface displacements associated to slope instabilities and in monitoring their spatial and temporal evolution. However, [...]

A Temperature- and Pressure-Sensitive Visco-Plasticity Theory based on Interface Mechanisms for Sedimentary Rocks

Mustafa Sari, Sotiris Alevizos, Thomas Poulet, et al.

Published: 2019-05-24
Subjects: Civil and Environmental Engineering, Engineering, Geotechnical Engineering, Materials Science and Engineering, Other Materials Science and Engineering

Constitutive modelling in geotechnical engineering and applied earth sciences is facing the challenge of assessing the long-term potential of both man-made and natural geohazards. This involves designing engineering operations for length scales and timescales well beyond those observable in the laboratory. In order to bridge the gap between scales, study rock behaviours well beyond their yield [...]

On the stability of deep-seated landslides. The cases of Vaiont (Italy) and Shuping (Three Gorges Dam, China)

Carolina Seguí, Hadrien Rattez, Emmanouil Veveakis

Published: 2019-05-24
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geology, Geotechnical Engineering, Physical Sciences and Mathematics

Deep-seated catastrophic landslides are among the most powerful natural hazards on earth. These devastating events are not possible to be prevented yet, because of their large volumes and sudden acceleration phase. The present study suggests a new method to detect when a landslide will turn unstable, giving both a time-window to evacuate the area that is going to be affected and critical values [...]

A heuristic model inversion for coupled thermo-hydro-mechanical modeling of triaxial experiments

Jack Lin, Mustafa Sari, Sotiris Alevizos, et al.

Published: 2019-04-25
Subjects: Applied Mathematics, Civil and Environmental Engineering, Engineering, Geotechnical Engineering, Physical Sciences and Mathematics

As multiphysics geomechanical models get developed, their increasing complexity and number of parameters make it particularly difficult to calibrate against experimental data. In this contribution, we present a heuristic workflow to invert for parameters of a coupled Thermo-Hydro-Mechanical (THM) model in a way that helps the theoretical modellers refine their definition of the underlying [...]

Machine Learning Reveals the State of Intermittent Frictional Dynamics in a Sheared Granular Fault

Christopher X. Ren, Omid Dorostkar, Bertrand Rouet‐Leduc, et al.

Published: 2019-03-05
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering, Physical Sciences and Mathematics

The seismogenic plate boundaries are presumed to behave similarly to a densely packed granular medium, where fault and blocks systems rapidly rearrange the distribution of forces within themselves, as particles do in slowly sheared granular systems. We use machine learning and show that statistical features of velocity signals from individual particles in a simulated sheared granular fault [...]

Using filtered and semi-continuous high rate GPS for monitoring deformations

Ahmed Ragheb, Stuart Edwards, Peter John Clarke

Published: 2017-11-13
Subjects: Civil and Environmental Engineering, Civil Engineering, Construction Engineering and Management, Earth Sciences, Engineering, Environmental Monitoring, Environmental Sciences, Geophysics and Seismology, Geotechnical Engineering, Other Civil and Environmental Engineering, Other Earth Sciences, Other Environmental Sciences, Other Physical Sciences and Mathematics, Physical Sciences and Mathematics, Structural Engineering

Multipath is a major sidereally-repeating error affecting precise GPS positioning and deformation monitoring. Because satellite-receiver geometry repeats almost exactly every sidereal day, filtering can reduce multipath in near-static situations. Here, we investigate how sidereal filtering can be used in a switched multi-antenna array system providing semi-continuous GPS data, which may be [...]

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