Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 33 for “"SOIL CLASSIFICATION"”.
-
Clay mineralogy and soil classification of alluvial and upland soils associated with Blackwater and Nottoway rivers in southeastern Virginia
… from Surry, Sussex, and Southampton counties. Soil classification as well as mineralogical, chemical, and physical analysis were conducted for all samples. The purposes of this investigation were to: (1)classify the soils in this area, (2) determine the distribution of sand and clay minerals, …
-
Sistema de classificação dos solos baseado na estrutura do espaço poroso
We propose a soil classification system named SPSCS (Soil Pore spaceStructural Classification System), which is based on pore space structure and takes into account the water retention curve. SPSCS was designed according to the textural classification system and it conceives a structural triangle …
-
Effects Of The Soil Properties On The Maximum Dry Density Obtained Fro
… and other structures, the compaction of soils is needed to improve its strength. In 1933 Proctor developed a laboratory compaction test to determine the maximum dry density of compacted soils, which can be used for specifications of field compaction. The Compaction of soils is influenced …
-
Hydrocollapsible soil correlations
… measured collapse and routinely measured soil properties. From graphs of each soil property versus percent collapse, it is determined that dry density and water content have the strongest relationship of the variables examined to collapse. Multiple linear regression was also utilized to …
-
Geotechnical investigation of Montrose wetland site
… tests performed in the laboratory to obtain the soil properties were: water content, Atterberg limits (liquid and plastic limits), grain size (sieve analysis and hydrometer), specific gravity, field density, and hydraulic conductivity. Tests were performed on soil samples taken from the site …
-
Investigating the Dynamic Soil Behaviour of Cape Flat Sands Under Earthquake Cyclic Loading
… are surrounded by partially or unsaturated soils, which can greatly affect their dynamic properties, such as shear modulus and damping ratio. Therefore, this necessitates an inclusive methodology to consider and incorporate the degree of saturation in seismic analyses to ensure that seismic …
-
Relationship Between Erodibility and Properties of Soils
… correlating the erosion resistance of a soil to its geotechnical properties. Existing erosion tests and erosion correlations are documented. Around 200 erosion tests, and more than 200 geotechnical index property tests were conducted at Texas A&M University. A spreadsheet called …
-
Characterizing soil erosion potential using electrical resistivity imaging
The erosion rate, or erodibility, of soil depends on many soil characteristics including: plasticity, water content, grain size, percent clay, compaction, and shear strength. Many of these characteristics also influence soil in situ bulk electrical resistivity (ER) measurements. The objective of …
-
An investigation in to the factors influencing flood magnitude in the British Isles
… a serious lack of range are found in the present soil classification system being used in Britain and improvements are suggested. A major new finding is that flood magnitudes generally increase in proportion to rainfall magnitude raised to a power of 1.3 and this relationship has now given …
-
Characterization and quality of soils developing on a mountaintop removal coal mine
… in recent years. Therefore, this study evaluated soil development on different aged mined lands. Four different ages (2, 7, 11, and 23 years) of minesoils and two different slope classes, nearly level to gently sloping and steep to very steep, along with three contiguous native soils on a …
-
Screening For Cry Genes From Bacillus Thuringiensis In Various Textural Classes Of Southwest Missouri Soils
… found in a variety of environments, primarily in soil. Environmental strains of B. thuringiensis were isolated from 21 soil samples and each soil sample was classified texturally based on percentage of sand, silt, and clay. Population densities were used to analyze the frequency of B. …
-
Cadmium accumulation in agricultural soils
Cadmium (Cd) has accumulated in New Zealand (NZ) soils as a result of phosphate fertiliser application. Cadmium is a biotoxic heavy metal and can be adsorbed by soil and enter the human food chain. Three objectives were investigated in this thesis: 1. Determine if the distribution of Cd varies …
-
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 …
-
Laboratory Resistivity Measurements for Soil Characterization
… to derive geotechnical information such as soil type, density, and water content from the data. A laboratory geophysical investigation was carried out to gain a better understanding of the parameters that affect the electrical resistivity of soils and devise a relationship between …
-
Soil-Landscape Modelling in an Andean Mountain Forest Region in Southern Ecuador
Soil-landscapes are diverse and complex due to the interaction of pedogenetic, geo-morphological and hydrological processes. The resulting soil profile reflects the balance of these processes in its properties. Early conceptual models have by now resulted into quantitative soil-landscape models …
-
Numerical simulation and field verification of inclined piezocone penetration test in cohesive soils
… analysis is performed to analyze the effect of soil anisotropy on the inclined piezocone penetration test in normally consolidated cohesive soils. The piezocone penetration is numerically simulated using the commercial finite element code ABAQUS. The saturated clay is modeled as a two-phase …
-
Post processing of cone penetration data for assessing seismic ground hazards, with application to the New Madrid seismic zone
… three-dimensional cluster analysis approach for soil stratification. InSituData facilitates the post processing of penetration data for seismic ground hazards analysis. A new three-dimensional soil classification chart is also proposed in this thesis to help discern soil layers that may be …
-
Examination of the impact of the natural environment on levee sustainability, An
… of the alluvial aquifer beneath the levee, and soil physical properties. A binary logistic regression was then applied to the dataset to evaluate the correlation between these environmental factors and the development of levee distress features (seepage lines and sand boils) and generate a model …
-
Integrated protocol for ground and structures condition assessments using ambient vibration
… by ground condition assessment protocol, the soil classification, soil thickness, and microzonation maps were determined for local soil condition. Meanwhile, in structural condition assessment protocols, the evaluations were made on rocking effect, soil-structure resonance, structural health …
-
Detection of expansive soils using remote sensing in Brits North-West Province South Africa
Expansive soils generally pose a significant geological hazard, which causes damage to civil infrastructure that could amount to billions of rand every year. Traditionally, expansive soils have been mapped and characterized using methods such as X-ray Diffraction (XRD) and standard engineering …
Page 1 of 2