Showing papers in "Engineering Geology in 1993"

TL;DR: In this paper, a simple conventional Brazilian test, which is normally used for the determination of rock tensile strength, was applied to measure rock fracture toughness, and the results compared favourably with those determined by the Chevron bending specimen method, one of the recently proposed international standard methods by the ISRM.

TL;DR: In this article, available stability constants for the formation of rare-earth elements (REE) complexes with the organic ligands acetate, adipate, benzoate, citrate, ETDA, formate, fumarate, glutarate, glycolate, α-hydroxyisobutyrate, β-mercaptoacetate, oxalate, m-phthalate, ophthalates, propionate, salicylate and succinate have been evaluated.

TL;DR: A case study of landslide hazard assessment of a 66 km2 area in parts of the Alkananda valley, the Gharwal Himalaya is presented in this article, where the factors considered in the analysis are angle and height of the slope, rock type and geological structures such as faults and thrusts.

TL;DR: In this article, a comprehensive study using three varieties of intrinsically anisotropic phyllites, obtained from the vicinity of the Chamera hydroelectric project site in the Himalayan region, was conducted.

TL;DR: In this paper, a geotechnical study was initiated to identify past, present and potential landslide types and sites for landslides; examine the nature of geological, geomorphological and geotehnical conditions under which failures can take place and the potential landslide hazard in the area.

TL;DR: The Lawrence Livermore National Laboratory and the Electric Power Research Institute have developed procedures that statistically merge multiple expert opinions to get probabilistic seismic hazard evaluations as mentioned in this paper, which are intrinsically defective and should not be used for design applications in engineering.

TL;DR: Krinitzsky et al. as mentioned in this paper showed that the Gutenberg-Richter b-values are dysfunctional for site-specific applications in the engineering of critical structures due to differences in the mechanism of faulting and nonuniformity in the occurrences of earthquakes over time and space.

TL;DR: In this article, it was shown that the groundmass microstructure exerts the primary control over the geomechanical behaviour of ignimbrite, while the crystal and clast size exerts a secondary control on compressive strength by influencing the initiation of microfractures through stress concentration around inhomogeneities.

TL;DR: The second-cycle slake durability index (I d2 ) ranges from very low (30%) to very high (99.3%) and all ignimbrite surfaces undergo significant plastic deformation prior to failure.

TL;DR: In this paper, the authors apply the theory of fractal geometry to describe the fracture network of a rock mass and apply it to the analysis of four faces of a copper mine in Arizona, showing fractal characteristics over the range investigated with coefficients of determination better than 0.99.

TL;DR: In this article, the basic geotechnical properties of dune sands are examined by laboratory tests for four sites in Kuwait and the results are presented and discussed as a first step toward a better utilization or improvement of these soils for local construction purposes.

TL;DR: In this article, a method for producing slightly calcium carbonate cemented sand is presented, these samples being used to better constrain the geotechnical parameters of slightly cemented carbonate sands when assessing dredging conditions.

TL;DR: Koide et al. as discussed by the authors showed that deep aquifers, which are not used due to high salinity, can host larger amount of carbon dioxide under their high formation pressure than natural gas and oil reservoirs.

TL;DR: In this article, the effects of soil properties on the shape, amplitude and duration of Rayleigh waves are shown from synthetic seismograms, and the comparison of surface wave inversion method with other techniques shows that the former leads to slightly underestimated velocity values.

TL;DR: In this article, the results of a study on rainfall and subsequent slope failures occurring during 24 severe rainstorms from 1982-1989 are presented. And it is suggested that intensity and areal extent of rainfall, as well as degree of urbanisation are important features determining the scale of a slope failure event.

TL;DR: In this paper, the properties of limestones with unimodal porous networks were investigated in laboratory experiments, and the results showed that they are resistant to freezing in microscopic pores.

TL;DR: In this paper, the authors describe the characteristics, problems and treatment of a seawater pumped-storage power plant which is the first high head type power plant in the world and propose a general geologic investigation program using boreholes for underground projects.

TL;DR: In this paper, bank failure episodes are concentrated at the early stages of lowering of channel water level due to the sensitivity of banks to removal of passive resistance, and high ground-water level accentuates seepage erosion which reduces bank stability.

TL;DR: Based on the tectonic framework of central Japan, including the surrounding submarine areas, the space-time relationship between destructive inland earthquakes of magnitudesM 6.4 or greater and great offshore earthquakes along the Nankai trough was examined.

TL;DR: The Ingurtosu Pb-Zn mine in Sardinia has been in production from the beginning of the last century up to 1968 as discussed by the authors, and the orebody consists of galena/sphalerite/barite/siderite veins in Ordovician arenaceous and phyllitic sediments, near the contact with a Hercynian batholith.

TL;DR: In this paper, a modified plasticity chart and a multi-parameter criteria are presented to identify the expansive soils according to the degree of their expansivity, and a hazard map is presented showing areas of potential danger from expansive soils to light engineering structures.

TL;DR: In this paper, archaeological data gathered at 55 archaeological sites excavated in the alluvial plains and basins of the inner belt of central Japan revealed the occurrence and age of events of liquefaction and flowage.

TL;DR: In this article, a quantitative model for estimating the gasification rate by different landfill types was proposed, based on measurement data for a long-term material balance for an aerobic landfill and an anaerobic landfill, obtained with two types of large-scale lysimeters.

TL;DR: In this paper, the deviation of the angle of undulatory extinction in quartz to predict the degree of potential reactivity, presuming that the quartz grains measured are in fact those which participate in the alkali-silica reaction is investigated.

TL;DR: In this paper, the authors studied the compression of debonded and collapsed loess in the laboratory using reconstituted samples of Sedlec loess and found that the bonded structure that develops seems to be qualitatively identical to that of natural collapsible loess.

TL;DR: In this paper, the authors describe the sequential fragmentation of the rock mass in terms of evolution of fracture arrays in time and conclude that fracture lengths follow a lognormal distribution with mean, mode and standard deviation estimated to 2.84 m, 1.52 m and 1.43 m, respectively.

TL;DR: In this article, the authors make recommendations for the planning, construction, operation and post-operational management of salt caverns used for the underground disposal of hazardous wastes, as required by the government's technical regulations on wastes under the section "Underground Disposal".

TL;DR: In this article, the possibility of excavating large underground tunnels in the seemingly "fragile" rocks in orogenic areas was considered as a national project for the underground storage of petroleum.

TL;DR: In this article, the principal collapse mechanism is identified as localised void migration, following roof collapse, with a possible secondary contribution from pillar over-stressing, due to inadequate rock cover, great age, poor rock quality and disturbance due to the urban location.