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.
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Showing 1 to 20 of 29 for “"Soil Improvement"”.
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Soil improvement by vertical drains
… the framework of the traditional concepts of soil mechanics for consolidation analysis of soft clays with or without vertical drains. ILLICON allows multi-layer analysis with each individual layer having its own compressibility and hydraulic properties which may vary during consolidation. The …
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Permanence and Life Cycle Performance of Biocementation Soil Improvement
… improve the engineering properties of granular soils through the generation of calcium carbonate minerals on soil particles surfaces and at interparticle contacts. The process can offer an environmentally beneficial alternative to conventional ground improvement methods, which have traditionally …
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Investigating the feasibility of implementing microbially induced calcite precipitation to stabilize sand, clay and gold tailings
… which has been successfully applied in soil improvement research. MICP uses the enzyme urease produced from bacteria to breakdown urea into carbonate ions. These carbonate ions combine with free calcium ions to form calcium carbonate, which acts as a bio-cement. MICP presents a unique, …
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The waterfront engine : proposal for a 21st century Delhi
… of environment, infrastructure and politics. Soil improvement and earthquake engineering techniques, renovated systems of transportation, water supply and treatment and electricity generation, mixed land use as well as institutional reforms and an intelligent real estate strategy are all …
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Determination of soluble mineral content in Las Vegas soils
Lower basin areas in the Las Vegas Valley contain soils with large amounts of soluble minerals. Dissolving and leaching processes due to water intrusion into foundation soils containing soluble minerals can cause a volume reduction of the soil which in turn causes structural stress. Soil …
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Performance of Improved Ground and Reinforced Soil Structures during Earthquakes – Case Studies and Numerical Analyses
… were located primarily in areas of poorest soil conditions, typically containing soft clays and silts and/or loose, liquefiable sands. Because the affected region is heavily developed with infrastructure and there is a preponderance of poor soils, a wide range of soil improvement measures …
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Irrigation of acacia and eucalyptus species with waters of different salinities in a semi-arid environment in Formentera, Balearic Islands
… quantities of highly saline irrigation water. Soil improvement and avoidance of detrimental long term effects was a prime objective. Two species, Eucalyptus gomphocephala D.C. and Acacia saligna (Labill.)H.Wendl. were tested with four irrigation treatments. Irrigation volume and frequency were …
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Numerical Analysis of RAP Elements under Dynamic Loading
… and related phenomena. As a result, an extensive soil improvement field testing program was initiated and Rammed Aggregate Piers� (RAP) were shown to be a feasible method to mitigate the risk from liquefaction during future events. To better design and more fully assess the efficacy of …
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Establishment of poultry production for developing a strong and sustainable local market economy of widows in itonjanda village, Tabora municipality
… and education expenses etc. In order that improvement is attained, income promotion to widows through poultry production was designed and carried out to widows in Itonjanda ward. To start with, fifteen individuals were organized into one group, ready to run the project of poultry production …
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Establishment of Poultry Production for Developing a Strong and Sustainable Local Market Economy of Widows in Itonjanda Village, Tabora municipality
… and education expenses etc. In order that improvement is attained, income promotion to widows through poultry production was designed and carried out to widows in Itonjanda ward. To start with, fifteen individuals were organized into one group, ready to run the project of poultry production …
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Behaviour of buried pipes adjacent to ground voids under dynamic loading
… the world. Therefore, there is a need for new soil improvement techniques such as geosynthetic materials installation to protect these pipes from damage. This study used large-scale laboratory tests to study the behaviour of buried pipes. A total of 22 large-scale tests were performed to study …
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Income Promotion among People Living With Hiv/Aids: A Case Of Kamachumu In Muleba District
… and education expenses etc. In order that improvement is attained, income promotion to PLWHA through goats rearing was designed and carried out to poor families of PLWHA in Kamachumu ward. To start with, thirty individuals were organized into groups in three villages of Bulamula, Bushagara, …
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Seismic response of wharf structures supported in liquefiable soil
… the fundamental mechanisms of saturated granular soil behavior. The thesis explains in detail the mechanical components of the macroelement as well as the necessary calibration steps. Numerical simulations of a typical berth of port facilities on the US West coast have been carried out using as …
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Integration of food consumption and nutrition considerations into the RIARS farming systems research and extension project in the Bicol region of the Philippines
… food crop production included crop protection, soil improvement, pest and disease control and overall plot design. Nutrition/ consumption aspects related to research trials included: selection of crops and varieties for filling food, income and nutrient gaps; and other nutrition-related areas of …
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Geochemical changes, plant growth and ecosystem recovery in soils after high temperature remediation
… treatments generate elevated temperatures in the soil (40-1200°C) that may impact its quality, particularly its ability to support plant growth and microbial activity. This thesis demonstrates the effects of such heating on soil properties, the impact on plant and microbial systems, and potential …
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Nitrogen Dynamics of the Acacia Senegal Agroforestry System in the Sudan
… savanna is characterized by low rainfall, poor soil and vegetation types dominated by the Genus<em> Acacia</em>. Agroforestry systems evolved, the most notable of which is Acacia senegal agroforestry system (ASAS). It yields gum acacia, fuel and fodder and improved soil N, P, and pH and …
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Seismic behaviour of structures with basements in liquefiable soil
… of structures with basements in liquefiable soil has been investigated. A series of highly instrumented dynamic centrifuge tests showed that the presence of a basement can reduce the liquefaction induced settlement of a structure whilst maintaining the natural isolation provided by liquefied …
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Geosynthetic Reinforced Soil: Numerical and Mathematical Analysis of Laboratory Triaxial Compression Tests
Geosynthetic reinforced soil (GRS) is a soil improvement technology in which closely spaced horizontal layers of geosynthetic are embedded in a soil mass to provide lateral support and increase strength. GRS is popular due to a relatively new application for bridge support, as well as long-standing …
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The hybrid of floating stone column by numerical and physical evaluation
… soft ground can be remedied by adopting a ground improvement technique. The stone column is one of the most effective and feasible techniques for soft clay soil improvement. Stone columns increase bearing capacity and reduce the settlement of soil. However, soft ground of more than 40 meters depth …
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Changes in soil properties under experimental tree plots on the Isle of Rum
… known about the impact it has on the underlying soils. Experimental tree plots, containing species native to western Scotland, were established on the Isle of Rum National Nature Reserve during the 1960's. This thesis seeks to assess the effects of 35 years of birch (Betula spp.), oak (Quercus …
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