Showing papers in "Engineering Geology in 1980"

TL;DR: The authors discusses the inaccuracies which arise from these inevitable assumptions and these neglected conditions of equilibrium and shows how equilibrium methods may be selected which avoid significant errors arising from the mechanics of the analysis, and thus allow the engineer performing the analysis to devote his attention and effort to correct evaluation of shear strength.

TL;DR: In this article, a method of probabilistic analysis of three-dimensional limit equilibrium stability of long earth slopes is presented and its application to earth embankment design is discussed.

TL;DR: In this article, an overview of the physical processes as they affect slope evolution, the available mechanical models, and the influence of slope parameters on the stability of the coastal bluffs are presented.

TL;DR: In this paper, a study was made of the abrasion and soundness characteristics of crushed-rock aggregates obtained from a wide variety of igneous rocks of volcanic and plutonic origins, that range from acidic to basic in composition.

TL;DR: In this paper, a computer program, STABL, developed at Purdue University, features unique random techniques for generation of circular as well as irregular trial failure surfaces in the search for the more critical ones.

TL;DR: In this paper, mineralogy, climatic conditions and land use jointly influence the geotechnical behaviour of soils and are each of significant importance, and the tentative foundation design for light buildings in semi-arid regions, suitable for implementation at local levels.

TL;DR: The Izu-Ohshima-Kinkai earthquake (M = 7.0 on the Richter scale) occurred at 12h24 Japan Standard Time on 14 January 1978 in Sagami Bay, and caused hazards in the eastern to central Izu Peninsula as mentioned in this paper.

TL;DR: In this paper, a tentative classification of calcrete gravels is proposed on the basis of the Los Angeles abrasion test results, which is intended to strengthen the universal character of the USCS.

TL;DR: In this article, the surface textures of quartz grains from fault gouges were examined by means of the scanning electron microscope, and they were tentatively classified into eight types; subconchoidal, orange peel-like, fish scale-like and moss-like.

TL;DR: In this article, the authors discuss the laboratory and pavement constructional evaluation of residual lateritic gravels over phyllite and conclude that the natural materials are unsuitable by standard gravel acceptance specifications for road base construction.

TL;DR: A series of earth tremors occurring in the area of Stoke-on-Trent during 1975, 1976 and 1977 were investigated with a network of seismometers as mentioned in this paper, at depths between 300 and 1000 m. The cause of many of the tremors is believed to be the interaction between the stress field produced by current mining and the residual stress field surrounding previous workings.

TL;DR: In this article, the stability of the bluffs along the Lake Michigan shoreline in eastern Wisconsin has been assessed and the geotechnical properties of the bluff materials which can be broadly grouped as glacial tills, lacustrine silts and clays, and sandy outwash, have been determined and related to the failure phenomena seen in the bluff.

TL;DR: In this paper, the undrained brittleness index was determined from stress-controlled isotropically consolidated undrained triaxial tests on tailings from three mining operations which produced garnet, iron ore and zinc.

TL;DR: In this article, the authors considered the elements of tectonic state (existing fractures, accumulated elastic strain, and deformational style) in order to forecast the occurrence of impoundment-induced seismicity.

TL;DR: In this paper, the tensile strength of nine sandstone formations in New Brunswick, Canada was determined by the pointloading and the line-loading (Brazilian test) methods for nine rocks.

TL;DR: In this paper, the problem of liquefaction of mine tailings is considered, and preliminary results are presented for garnet and zinc tailings with similar index properties, and further work is indicated.

TL;DR: In this paper, the effect of normal stress on the transmission of P-waves in jointed rock was studied, supported by measurements of seismic wave velocity carried out in tunnels driven in Lower Chalk and Carboniferous strata.

TL;DR: In this article, the suitability of a flexible lining provided in this zone has been evaluated in view of the region being seismically active and a tunnel instrumentation program was implemented to evolve a flexible support system capable of reducing rock loads to manageable levels in highly squeezing rock conditions.

TL;DR: A simplified but rigorous mechanical description of the motion of the mass center of rockslides and avalanches leads to an ordinary second order differential equation that accounts for a variety of complex phenomena including periodic pore pressure variations with time, transient loading and rock slide "triggering".

TL;DR: In this paper, a program to describe and analyze rock materials along Massachusetts highways is described, and the strength of these materials and susceptibility to failure depend on their composition and structure, as well as on hydrologic conditions and steepness of the slopes.

TL;DR: In this article, the most characteristic mechanical and physical properties of ten Hellenic marbles were investigated, five of which were white and the other five coloured, are the most representative ones found in Greece and useful conclusions regarding the utility of each marble for various applications are derived.

TL;DR: In this article, the authors discuss the geology, distribution and production of construction material resources of Lebanon, and point out the need for a systematic compilation of pertinent data to facilitate evaluation of supplies for future development.

TL;DR: In this paper, the Bagnold theoretical method of grain flow is used to explain the mobilization of mudflows formed in clay slopes on low angled surfaces, which can be regarded as a mass of concentrated grains that are dispersed in a fluid medium.

TL;DR: In this paper, the authors conducted site investigations for the Kalyani Dam, Chittoor District, Andhra Pradesh, India, and revealed the presence of several fault and shear zones in the area.

TL;DR: In this paper, an air-injection survey showed that high permeabilities are confined to the highly fractured annulus around a tunnel to a depth of at least 0.6 m. This technique was applied for future reference in mining design and, perhaps to be used later to detect microfracturing prior to rockbursts.

TL;DR: In this paper, the effect of normal stress on the transmission of p-waves in jointed rock was studied and the results showed that relatively small normal stresses are sufficient to close joints acoustically.

TL;DR: In this paper, two methods of analysis of the seismic stability of earth dams, as used by the U.S. Army Engineer Waterways Experiment Station (WES), are presented in outline form.

TL;DR: In this paper, a review of some plasticity models suitable for slope stability analyses is presented, and a program for the application of these models to earthquake-induced landslide problems is then outlined.