Showing papers in "Engineering Geology in 2013"

TL;DR: In this paper, the authors presented a study that has been funded by the Universidad de Alicante under the projects uausti11-11, VIGROB-212 and gre09-40 and by the Generalitat Valenciana under the project gv/2011/044.

TL;DR: In this article, experiments were conducted to evaluate the parameters that affect the particle breakage of calcareous sands, including confining pressure, relative density, axial strain, drainage conditions and grain size distribution.

TL;DR: In this paper, a comparative evaluation of different index tests and analysis techniques (i.e. regression analyses and fuzzy inference system) in predicting uniaxial compressive strength (UCS) of granite, schist and sandstone were determined for the concerned rocks.

TL;DR: In this paper, a review of the literature on microstructural effects on hydraulic properties of different compacted clayey soils is presented to bring into light the important micro-structural changes on wetting and drying.

TL;DR: In this article, the salinity effects of infiltrating solutions on the swelling pressure and hydraulic conductivity of GMZ01 bentonite samples were investigated, which has an initial dry density of 1.70 mg/m3, with de-ionized water as well as NaCl and CaCl2 solutions at different concentrations.

TL;DR: In this paper, a newly developed jet grouting technology for the instant solidification of soft ground is presented, where the basic principles of the twin jet method are introduced and sodium silicate (water-glass) is selected as the binder to accelerate the hardening process of an admixture of grout and soil.

TL;DR: In this paper, the processes leading to the onset of rainfall-induced flow landslides in coarse-grained soils are illustrated and some observations on their modelling are briefly recalled.

TL;DR: In this article, the authors present the results of a laboratory study of the thermal conductivity of six soils and three rock types was experimentally measured using both a thermal needle probe and a divided bar apparatus.

TL;DR: A Markov Chain Monte Carlo Simulation (MCMCS)-based approach for probabilistic characterization of undrained Young's modulus, Eu, of clay using standard penetration tests (SPT), and the characteristic value of the soil property is selected accordingly.

TL;DR: In this paper, the effects of a combined lime+cement treatment on both the characteristics and properties of a plastic silt were investigated and a multi-scale approach was implemented and themechanical, microstructural and physicochemical changes were investigated.

TL;DR: A series of ring-shear tests was conducted on saturated loess to investigate the effects of NaCl concentration in pore water and desalinization on the shear behavior under undrained conditions.

TL;DR: In this article, a karst collapse susceptibility map was produced using a multivariate statistical method and a Geographical Information System (GIS) for the northern suburbs of Athens (Greece).

TL;DR: In this paper, the authors show that the wide scatter observed for very large mass wasting events in all environments collapses to a single relationship between event volume or inundation area and mobility, and demonstrate that fluidization is associated with long run-out distances, and that the degree of fluidization can be predicted by the volume and physical and topographic parameters of the flow.

TL;DR: In this paper, the authors evaluated the discrete element method (DEM) as a tool for understanding the step-path failure mechanism in fractured rock masses, and the results showed that the DEM accurately represents these processes in comparison to other studies in the technical literature.

TL;DR: In this article, a run-out analysis of the Daguangbao landslides subjected to near-fault multi-direction earthquake forces using discontinuous deformation analysis (DDA) is presented.

TL;DR: In this paper, ground failure associated with land subsidence due to groundwater withdrawal is the main geotechnical hazard in the Aguascalientes Valley, causing enormous economic loss by damage to public and private properties, including urban infrastructures.

TL;DR: In this article, the unsaturated hydraulic properties of MX80 bentonite/sand mixture were characterized by carrying out a series of experiments including water retention test, infiltration test as well as microstructure observation.

TL;DR: In this paper, an experiment with insulated-undrained high columns has been carried out to understand these THMC processes, and the results support that the THMC properties of CPB are strongly coupled due to several internal mechanisms, such as heat of hydration, selfdesiccation, suction development and cement hydration.

TL;DR: In this article, a series of unconfined compression tests was performed on about 150 standard samples of 13 designed mixes and the effect of binder content (such as lime, lime and fly ash) on peak strength and failure strain was discussed.

TL;DR: In this article, the influence of petroleum-derived contaminants on the geotechnical properties of soils was investigated using Atterberg limits, consolidation, direct shear, and unconfined compression tests on clean and contaminated kaolinite specimens at the same relative compactions.

TL;DR: In this article, a statistical approach was used to find the geological parameters influencing crack initiation stress, such as grain size and mineralogy, and the proportion of the hardest constituent mineral were found to correlate with CI stress.

TL;DR: In this paper, the authors studied the relationship between landslide motion and its causes, with reference to large, slow moving, reactivated translational translational rock slides, and found that the annual movement pattern of a reactivated landslide is a combination of these processes that generate a complex overall movement record.

TL;DR: In this paper, a probabilistic analysis method was proposed to assess shallow landslide susceptibility over an extensive area by integrating an infinite slope model with GIS (Geographic Information System) and Monte Carlo simulation, taking into consideration the inherent uncertainty and variability in input parameters.

TL;DR: A review of the literature on diffusion coefficients for radionuclide diffusion through engineered containment barriers is presented in this paper, where the authors identify four definitions of diffusion coefficients, viz., D⁎, De, Dp, and Da, which differ on the basis of Fick's first and second laws for governing macroscopic diffusion through porous media.

TL;DR: In this paper, a research was conducted to study the effectiveness of ground granulated blastfurnace slag (GGBS), an industrial byproduct, for providing better stabilization of sulfate bearing soils.

TL;DR: Wang et al. as mentioned in this paper established a plug model to describe the behavior of water seepage flow in coal-seam-floor containing karst collapse pillars (KCPs), and showed that the water flow may change into pipe flow, especially when a large number of the mass of the KCP and the surrounding rocks entered into goaf road, which may lead to instable flow and cause groundwater inrush.

TL;DR: In this article, a rigorous limit equilibrium column method, in which inter-column forces are taken into account, is established based on six equilibrium conditions which include three direction force equilibrium conditions along coordinate axes and three direction moment equilibrium conditions around three coordinate axes.

TL;DR: This paper presents the development of the algorithms used in the software program PlaneDetect for the automated identification and mapping of planar discontinuities within a 3-dimensional surface model of a jointed rockmass.

TL;DR: In this paper, the authors used effective confining pressure to simulate effective stress and found that high-rank coal permeability is susceptible to effective stress, and that coal samples' air permeability decreases exponentially with the rise of effective stress on the whole.

TL;DR: In this article, a naturally fractured coal specimen was chosen and the subcritical CO 2 flow was maintained by monitoring the injection pressures and ambient temperature; the variations in permeability under various scenarios were also investigated.