IJERT-Geotechnical Mapping of Federal University of Technology (now MAUTECH) Yola Site, Nigeria (original) (raw)
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African Journal of Environmental Research , 2018
Water is vital to life, ensures human survival and societal development. Its overdraft and harnessing can affect the environment adversely. This study evaluates the water resources and geotechnical properties of soils in Uga area, southeastern Nigeria. The study area lies in the rainforest zone where rainfall is extreme and thus boasts of high water resources potential. Comprehensive data are lacking for effective water planning purposes. This research work contributes to existing data on the water resources potentials of Uga and environs. Surface waters (Obiada River and Agwura Stream), springs (Nwagene, Obizi and Ogbei Springs) abound in the area. Nanka Sands which is a prolific waterbearing unit defines the underlying geology of the area. Flow rates of surface waters are high due to annual precipitation of 2500mm a year. Springs are clear. Nwangene Spring has a flow rate of 0.39 m/sec while Obizi spring has a flow rate of 0.04 m/sec. Borehole depth at Nanka and Oko is 380 meters and 314 meters respectively while static water level is 42 meters and 69 meters respectively. Huge sand deposits abound in the area. This research work highlighted the geotechnical properties of soils from the area. Cobble, pebble and gravel sized grains are absent. CBR values ranged from 30% to 35%. Highest MDD gave a value of 1-824gcm-3 with an OMC of 11%. The lowest MDD recorded a value of 1.622gcm-3 with an OMC of 8%. LI test conducted on one of the samples yielded a value of 16%. PL and PI tests gave zero values for all the samples. The geotechnical results implied that soils from the area are excellent to good reserves for sub-grade and sub-base materials respectively.
Geotechnical characterization of soil helps to determine and understand the behavior of soil of a particular place, it also helps in determining soil water content, specific gravity, plasticity, strength, size of particles, compressibility, and soil bearing capacity. The focus of the study is to carry out the geotechnical characterization of soil in order to determine the types of soil and its suitability for construction purposes. The study area lies between latitude 007 0 43 ' 47 '' N and 007 0 71 ' 81 '' N and longitude 004 0 25 ' 18 '' and 004 0 43 ' 64 '' East of Greenwich Meridian. Samples of soil were collected at six different points at a depth of 0.5m. Laboratory soil test were conducted according to the BS1991 standard with necessary modification made which include Natural Moisture Content(NMC), Specific Gravity(SG), Grain Size Analysis(GSA), Atterberg's limits (liquid limits, plastic limits, shrinkage limits). From the g...
Geotechnical Properties of Soils in Ikole-Ekiti Area, Southwestern Nigeria
The geotechnical properties and litho-stratigraphic soil profile of soils in Ikole area of Ekiti State were investigated from the analysis of results of laboratory tests on disturbed and undisturbed soil and water samples obtained from 3 borings. The investigation revealed a subsurface stratification made up of reddish brown granitic clayey sand from existing ground level to a depth of 9m to 12.0m. This is underlain by a layer of mottled, brown, decomposed micaceous sand to a depth of 16.5m-18m immediately after which are layers of mottled grey, decomposing quartzite sand to about 18.0m to 19.0m depth. This is further underlain by fragments of freshly weathered granitic rock to the termination depth of 19.5m. The consistency limits indicate LL of 44-58% and PL of 18-26% while the quick undrained triaxial tests indicate undrained cohesion within the range (128.4-157)kN/m 2 and undrained angle of internal friction (15.0-20.0) 0. Groundwater was encountered between 6.5m to 7.5m below t...
Geotechnical Properties of Clay Soilsin Uyo Town, Eastern Niger Delta, Nigeria.
IOSR Journals , 2019
This study investigates, the geotechnical and mineralogical properties of clay soils in Uyo town, for construction purposes. On the basis of the field and laboratory investigations, the general subsurface profile of Uyo town consists of silty clays from 0-3m, sandy clays (3-15m) and sand from 10-20m.The silty clays are firm with a low to intermediate plasticity and high cohesion values, while the sandy clays, are also of low to intermediate plasticity, with high consolidation and cohesion values, that are expected to yield relatively higher shear strength than the silty clays. X-raydifraction analysis of the clays reveal the presence of kaolinite, quartz and trace amounts of goethite in the silty clays. Analysis of the foundation potentials using CPT results show that the silty clays have low potentials while the underlying sandy clay horizon may be suitable for small and medium civil engineering structures.
This study evaluates the index and engineering properties of soils in Otukpa Area of Benue State towards ascertaining their suitability for use as fill and embankment, sub-base and base course material. Otukpa in Benue state Nigeria has vast reserve of sand and other aggregate materials that are presently been mined for various construction purposes. The area holds good potential for human population explosion in the near future. When massive infrastructural development commences, localized sourcing of materials would be necessary. Unfortunately, not much is known of the geotechnical properties of the sands in this area. Index and engineering test was conducted to achieve the aim. Gravel size particles are completely absent. Permeability of soil ranged from 7.8×10 -6 to 3.36×10 -4 m/sec with moisture content of 11.38 to 14.16%. Specific gravity was between 2.63 to 2.67g/cm 3 . UCS range from 31-45Kpa while LL and PL ranged between 27-35% and 10-18% respectively. MDD peak value was 1.85(g/cm 3 ) at an OMC of 12.11% and lowest at 1.67(g/cm 3 ) at an OMC of 11.99. The geotechnical implication of the observed properties range from susceptibility to marginal volume change, differential settlement to low shearing resistance. These materials are quality reserves for fill, embankment and sub-base construction but not for bases.
Variability in the Geotechnical properties of some residual clay soils from southwestern Nigeria
Some residual clay soils from southwestern Nigeria have been investigated with a view to elucidating their geotechnical properties and determine the possible variations in these properties in relation to the sampling distance. Eight bulk residual soil samples from two test pits separated 30m apart at intervals of 0.5m up to a depth of 2.0m were analyzed in the laboratory to determine specific gravity, grain size distribution, consistency limits, linear shrinkage, unconfined compressive strength and compaction characteristics. The data generated were subsequently subjected to statistical analysis. The investigations revealed that the soils are generally well graded, inorganic, with medium to high plasticity and hence compressibility and are of the same geologic origin. Statistical T-test showed no significant difference exists between the soils in terms of specific gravity, liquid limit, plastic limit, plasticity index, linear shrinkage, % clay size fraction, amount of fines, unconfined compressive strength and optimum moisture content. However the maximum dry density of the soils from both pits differed significantly. Although most of the parameters examined are not as varied and showed insignificant difference, the equations generated provide an option in the estimation of properties considering the close sampling distance.
LAUTECH Journal of Civil and Environmental Studies, 2018
This study investigates geotechnical characterizations of sub-soil within LAUTECH community as well as the relevant engineering characteristics were evaluated to enable appropriate foundation design. Nine (9) soil samples were obtained at 1.0, 2.0 and 3.0m using boring methods from three locations: LAUTECH Security Unit,(LSU:N8°5.977; E4 10.112), LAUTECH Chapel, (LC:N8° 07.756; E004’ 12.981), and LAUTECH Software Building, (LSB: N8° 09.986; E4’15.781′). The samples were subjected to visual examination and subsequently geotechnical tests in accordance to British Standards BS 1377, (2000). The tests were Specific Gravity (SG), Particle Size Distribution Analyses (PSDA), Liquid Limit (LL), Plastic Limit (PL), and Compaction test using British Standard Light (BSL) compactive effort, California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS). The samples from all the locations varied from light brown sand to reddish gravel. The SG values for LSU, LSB and LC were (2.66, 2.63...
2012
This work focuses mainly on the Geotechnical properties of mapped areas in Gombe town which forms part of the Upper Benue trough. Representative soil samples were collected from these areas and were investigated for their Geotechnical properties with a view to classifying for their suitability or otherwise for infrastructural development. Hitherto, this has not been done in the Gombe town area. The recent growth which is associated with urbanization in Gombe Township calls for appropriate geotechnical investigation of soils of the area. Twelve representative samples were collected from different locations of the mapped areas around Kanol, Hamatatu, Wurro Daji, Kalshing Forest, Titi Baba, Chongo, Danba, Wurro Ladde, Pantame, Tempure, Tonde, and Kulalum. Samples from each site were collected at 1m depth and analyzed using the following tests: Moisture content test, Particle size distribution test, Atterberg limit test, Specific gravity test, Compaction test. All these tests were carri...
Nigerian Mining Journal, 9(1), 7-17., 2011
The geotechnical properties of Lateritic soils from part of Jos and environs have been investigated covering 78km2 within latitudes 80 50` to 80 56` N and Longitude 90 50`to 09 0 54`E, central Nigeria; with a view to assessing the suitability of the soils for construction and other engineering applications. Representative samples were collected from twenty locations within the study area and subjected to series of laboratory geotechnical analyses such as the grain size analysis, Atterberg limits, Liquid/Plastic Limit tests, Plasticity Index, Linear Shrinkage Tests, Compaction and shear Strength tests in Accordance with procedures of the British standard (BS)1377 with necessary modifications. Geotechnical results obtained revealed that the liquid limit ranging from 30.3 – 61.7 % and plastic limit ranged from 22.5% - 40.6%. The plasticity index was found to be between 7.8% and 21.7% and linear shrinkage values ranged between 5.7 and 11.4 indicating low – medium swelling potential with some indication of expansiveness by some of the samples. Based on the Unified Soils Classification System (USCS), the soils of the study area can therefore be poor, fair or good materials. Based on compaction characteristics the soils can be considered poor to fair and therefore suitable for construction of embankments. Some of the soils will require some form of improvement in order to be suitable for highway construction and other applications. From the established coefficients and angles of friction of soils derived from the Morh’s circle of the study areas, the various bearing capacities of soils can also be determined for civil and construction purposes.
Geotechnical Properties of Lateritic Soils from Northern Zone of Anambra State, Nigeria
This investigation was carried out to determine the geotechnical properties of lateritic soils used for road construction in Obosi, Umunya, Awkuzu, and Igbariam towns, all in Northern Zone of Anambra state of Nigeria. Tests were carried out on the soil samples which include the Atterberg limit tests, particle size distribution analysis, specific gravity, compaction test using the British Standard Light (BSL), Compactive effort and California Bearing Ratio (CBR) test as specified by the West African Standard (WAS). The liquid limits, plastic limits and plasticity indices guided in the classification of the soil samples as A-2-4 soil of American Association of State Highways and Transportation Officials (AASHTO) classification and SC group of Unified Soil Classification System (USCS). The compaction characteristics of the soil were found to be 1931KN/m3, 2003.8KN/m3, 1965KN/m3 and 1923KN/m3 for maximum dry density and 10.8%, 9.4%, 10.4% and 12.20% for optimum moisture content for samples 1, 2, 3 and 4 respectively. The California bearing ratio (CBR) results for the samples for 24 hours soaking are 48%, 58%, 45%, and 52% for sample 1, 2, 3, and 4 respectively. It was concluded that the four lateritic soil samples were suitable for sub-grade and sub-base but should not be used in road construction as a base material.