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Showing 1 to 19 of 19 for “"residual soils"”.
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Determining parameters for stiff clays and residual soils using the self-boring pressuremeter
As testing stiff soils in the laboratory often leads to information which is not consistent with field performance, research was undertaken to determine in situ the soil properties. Among the devices which generated interest is the self-boring pressuremeter (SBPM). In this research, two stiff soils …
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Hydropedology of Problematic Interfluve Transported Soils in the Central Virginia Piedmont
Interpreting soil wetness in upland transported soils on flat broad summits in the central Piedmont of Virginia containing chroma ≥ 3 redoximorphic features (RMFs) can be difficult. It is imperative to understand their saturation regimes because onsite wastewater disposal systems, which are sited …
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Versão COPPE do TWM para simulação em bacias hidrográficas com solos residuais
… simulation of hydrografic basins wih residual soils, based on SWM IV e TWM. The model makes total discharges simulation for any interval of time so as its components and evapotranspiration, starting from rainfall data and soil physical characteristics. Programmed to be used by 150k …
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Slope Stability Of Laterite Soil Embankments
… of structures such as dams, bridges, and roads. Residual soils are generally used as fills in the construction of embankments in areas were residual soils such as laterite is the dominant soil types. Laterite soils have the characteristics of losing its shear strength with time and in fully …
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Erosão superficial em taludes de corte em solo Residual de Gnaisse
… erodibility of various layers of gneissic residual soils was compared. Also in this part, an attempt was made to correlate the relative erodibility observed in the tests with other soil properties. The second part deals with field observations in various slopes and the measurement of …
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Obtaining design information from full-scale structures
… future exercises of this type. 1.2 1.3 Tropical residual soils display certain differences in their behaviour from transported soils. This paper shows that provided these differences are recognized, the behaviour of tropical soils under load can be rationally predicted. While the broad behaviour …
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Determinação experimental, para solos residuais saturados, da variação dos parâmetros de resistência com a deformação axial
… to determine the components of shear strength of soils, according to new definitions. The shear strength at any deformation is divided into the D component (depending on the normal effective stress) and the I component (independent of normal effective stress), which are new definitions of friction …
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The meaning and practical significance of the cohesion intercept in soil mechanics
… 300 natural deposits throughout the world. The soils which include soft clays to shales and residual soils, have a range of water content of 7-330%, liquid limit of 15-420%, plasticity index of 3-285%, liquidity index of $-$5.5 to 3.5, sensitivity up to 500, clay fraction of 2-93% and, activity …
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Ensaios triaxiais dinâmicos de solos argilosos
… non saturated compacted samples of four clay residual soils form subgrade and improved subgrade layers. The soil samples were taken from pavements at federal highways BR-040/RJ, BR-116/ MG, and BR-277/PR. Testing aimed at two objectives: to study the effect of applied stresses and compaction …
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Weathering Regimes and Pedogenic Variability on Large Boulders, Karkevagge, Northern Scandinavia
… (1) Clay content was marginally greater in soils developed on garnet-mica-schist than mica-schist; (2) Silt and clay content did not reflect eolian sediment input; (3) Soils that have formed on boulder tops are characterized as residual soils; (4) Deeper soils had developed overlying …
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The evaluation of embankment stresses by coupled boundary element - finite element method
… (x- and y-directions). Where bedrock or dense residual soils underlie the soft foundation soil at a relatively shallow depth, this is a good assumption. However. when soft soil is encountered for large depths, the assumption of zero movement constraints for a mesh boundary at a shallower depth …
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Suitability of Lateritic Soils as Construction Material in Sustainable Housing Development in Africa : a Geological Perspective
Lateritic soils which have been described as highly weathered tropical or sub-tropical residual soils with varying proportions of particle sizes ranging from clay size to gravel, were studied in an attempt to establish its suitability or otherwise as sustainable material in building bricks and …
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Surface detection of alkaline ultramafic rocks in semi-arid and arid terrains using spectral geological techniques
… when they are exposed, weathered and reduced to residual soil. The data used in this study were spectra obtained from field spectrometers (PIMA and GER IRIS MkIV) and airborne scanners (GEOSCAN MkII, GER IS and HyMap). These data were gathered at four sites within Australia. The data processing …
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Effects of Mica On Soil Properties For Embankment Construction
… part of the highway construction process, and soils from borrow pits are often used to construct these structures. The soil from these borrow pits is often characterized as needed, on a project by project basis, and is tested for the properties necessary for embankment design. As the upstate of …
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Virgin hardwood forest soils of western North Carolina
Little is known about the original properties of soils in the East. Eight virgin soils and associated southern Appalachian hardwood vegetation were studied in western North Carolina. The study sites ranged in elevation from 720 to 1200 m on steep slopes. Overall these soils are quite deep and …
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Axial behavior of drilled shafts in soft rock
… the allowable pressure of the near-surface soils leading to bearing capacity failure or excessive settlements. Therefore, deep foundations are normally used to support heavy structures where loads are transferred to the more competent strata. Drilled shaft foundations are among the most …
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Improving Site Quality Estimates in the Upland Hardwood Forests of the Southern Appalachians with Environmental and Spatial Modeling
… on field and digital data, to identify colluvial soils in the central Ridge and Valley of southwestern Virginia. Two hypotheses were tested. First, on the linear side slopes of the study area, where site quality is low in stands with subxeric to xeric moisture regimes, vegetation and topography …
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Some properties of Washington County soils and their relation to soil type and plant growth
1. Seventy-five samples of soils were taken in Washington County, Virginia. These samples were taken while the soil survey was in progress. In this group thirty-one different soil types were included. The samples were taken from all parts of the county. Notes were made of the soil type, slope of …
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Slope stability analysis and landslide susceptibility assessment on the SE foot slopes of Mt Cameroon
Landslides are well known processes that hamper sustainable development efforts, particularly in developing countries where extreme poverty is already a household to societal scale problem. Though a worldwide issue, landslides remain enigmatic especially with regards to their geometry, causative …