Proceedings of the First Southern African Geotechnical by S.W. Jacobsz

By S.W. Jacobsz

The First Southern African Geotechnical convention used to be organised by means of the Geotechnical department of the South African establishment of Civil Engineering (SAICE) below the auspices of the foreign Society of Soil Mechanics and Geotechnical Engineering (ISSMGE) and came about at sunlight urban, South Africa on five and six may perhaps 2016. greater than 60 papers have been acquired from authors in South Africa, Botswana, Kenya, Tanzania, Uganda, Algeria, Austria, France, Germany, Switzerland and the uk. They characterize consulting engineers and engineering geologists, contractors, teachers and product experts. The papers have been grouped into the next issues: Foundations, Mining and Tailings, Modelling and layout, website research, Soil houses and Soil Reinforcement and Slopes. the big variety of subject matters is taken into account to be completely consultant of the present actions of the geotechnical within the Southern African Region.

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This area has recently begun to be developed into one of the major wind energy corridors in the country. Soil profiles close to the town of Vredenburg, where the largest wind farm in the Western Cape exists, was chosen for this study. These conditions included varying degrees of sandy and clayey silts as well as some gravelly clays all typical of residual granite material. This was underlain by hard granite bedrock at a depth of approximately 30 m. Figure 2. Campbell diagram for natural frequency design range (Mawer 2015).

Soil reinforcement techniques as a concept, make use of what capacity is within the soil and compensate as necessary using stiffer materials to achieve the required bearing capacity or settlement reduction. This is in contrast to piling which transfers the full structural load to a deeper substrata, and effectively replaces any founding capacity in surface layers. The invention of techniques such as Dynamic Compaction in 1969 by Louis Menard, Hamidi, Nikraz & Varaksin, (2009), allowed geotechnical engineers to improve in-situ soil parameters of loose granular soils rather than installing traditional piled solutions.

Effects of time on capacity of pipe piles in dense marine sands, J. of Geotech. and Geoenviron. Eng, ASCE, 124(3): 254–264. W. Mawer Jeffares & Green, Cape Town, South Africa D. Kalumba University of Cape Town, Cape Town, South Africa ABSTRACT: One of the critical, and often governing design considerations for wind turbine foundations is the inherent in-situ soil stiffness and its effect on the structure’s resistance to resonance and dynamic vibrations. Wind turbines fall in a unique class of structure, in the sense that, they exist as structural systems exposed to dynamic loads, which in turn, create additional new dynamic loads for which they must be designed.

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