Engineering Geology

Journal: Engineering Geology

Abbreviation

Eng. geol.

Publisher

Elsevier

ISSN

0013-7952
1872-6917

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Publications 1 - 10 of 43

Investigation of Kinnekulle K-bentonite aimed at assessing the long-term stability of bentonites under repository conditions
Müller-Vonmoos, Max; Kahr, Günter; Bucher, Felix; et al. (1990)
Engineering Geology
Assessment of mineralogical and petrographic factors affecting petro-physical properties, strength and cracking processes of volcanic rocks
Ündül, Ömer (2016)
Engineering Geology
Role of hydro-mechanical coupling in excavation-induced damage propagation, fracture deformation and microseismicity evolution in naturally fractured rocks
Zhao, Chenxi; Zhang, Zixin; Lei, Qinghua (2021)
Engineering Geology
We present a numerical study of spatio-temporal damage evolution and fracture displacements around underground excavation in fractured rock masses. We conduct a comparative analysis of this problem based on a mechanical (M) model by assuming an invariant pore pressure and a hydro-mechanical (HM) model by solving the coupling between the fluid and solid fields. In both models, an elasto-brittle constitutive law is employed to mimic the deformational and failure behavior of intact rocks, while a non-linear stress-displacement relationship is used to account for the normal compression and shear dislocation of natural fractures. In the HM model, we simulate excavation-induced transient groundwater flow in fractured porous rocks based on Darcy's law. The hydraulic and mechanical fields are linked based on the coupling mechanisms of poroelasticity (direct HM coupling) and stress-dependent material properties (indirect HM coupling). Many important HM phenomena such as stress perturbation, pore pressure fluctuation, damage evolution and fracture deformation are realistically captured in our simulation. We find that both direct and indirect couplings play important roles, and the excavation-induced disturbance in rock varies with the coupling degree characterized by the Biot coefficient. One interesting observation is that excavation-induced stress redistribution around the tunnel instantly causes perturbed pore pressure in low-permeability matrix, which gradually becomes dissipated during the post-excavation drainage. We also highlight the role of natural fractures in the tunnel inflow process and elucidate the consequences of spatial and temporal pressure variations. In addition, we analyze the microseismicity occurrence during and after the excavation to gain insights into excavation and drainage-induced responses in the fractured rock. The results of our simulation and analysis have important implications for underground excavation involved in many geoengineering applications such as civil infrastructure, nuclear waste repository and oil/gas/geothermal wellbore systems.
Internal structure and deformation of an unstable crystalline rock mass above Randa (Switzerland)
Willenberg, Heike; Loew, Simon; Eberhardt, Erik; et al. (2008)
Engineering Geology
Numerical modelling of waves in snow avalanches over an erodible bed: Effect of slope angle and erodible thickness
Yuan, Can; Li, Xingyue; Wang, Siyi; et al. (2025)
Engineering Geology
Waves in snow avalanches may have disaster-causing effects. Although the study on avalanche waves has received increasing attention, there still lacks quantitative characterization of wave behaviors under well-controlled conditions, leading to unclear mechanisms of avalanche waves. In this study, the dynamics of avalanche waves is thoroughly investigated with consideration of an erodible bed, by using a hybrid Eulerian-Lagrangian numerical approach called the material point method. The effect of slope angle and erodible thickness on wave behavior is quantitatively analyzed, in terms of amplitude, length, and velocity of waves. The results show the occurrence of both frontal waves and tail waves in an avalanche, while the frontal waves are explored in more detail as they can lead to large destructive power with high velocity and height. It is found that the evolution of the amplitude and wavelength of the frontal waves with the slope angle and erodible thickness can be explained with different components of kinetic energy. The merging of waves and the induced increase of wave velocity are clearly captured. Interestingly, the growth of wave velocity is more obvious with smaller slope angle and erodible thickness. Furthermore, the Froude number of the avalanches is investigated, while the dominant effect of flow velocity and height at different cases is revealed. The outcomes from this study shed light on the behavior and underlying mechanisms of waves occurred in granular flows such as snow avalanches.
Geotechnical characteristics of post glacial organic sediments in Lake Bergsee, southern Black Forest, Germany
Becker, A.; Bucher, F.; Davenport, C.A.; et al. (2004)
Engineering Geology
Non-invasive detection of fractures, fracture zones, and rock damage in a hard rock excavation - Experience from the Äspö Hard Rock Laboratory in Sweden
Walton, Gabriel; Lato, Matthew J.; Anschütz, Helgard; et al. (2015)
Engineering Geology
Multi-stage structural and kinematic analysis of a retrogressive rock slope instability complex (Preonzo, Switzerland)
Gschwind, Sophie; Loew, Simon; Wolter, Andrea (2019)
Engineering Geology
The three stages of stress relaxation - Observations for the time-dependent behaviour of brittle rocks based on laboratory testing
Paraskevopoulou, Chrysothemis; Perras, Matthew A.; Diederichs, Mark S.; et al. (2016)
Engineering Geology
Internal structure and deformation of an unstable crystalline rock mass above Randa (Switzerland)
Willenberg, Heike; Evans, Keith; Eberhardt, Erik; et al. (2008)
Engineering Geology

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Journal: Engineering Geology

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