Hungarian experience about the correlation of CPT and DPH results is summarized. A historical review of CPT-DPH and CPT-SPT correlations is presented, and the reliability of the published CPT-DPH correlations is analyzed using recent data from Hungarian geotechnical practice. Based on these data the paper defines soil types where reliable correlation exists and proposes formulas describing the relationships between the CPT and DPH results, because in the case of hard state clays and soils containing gravel an acceptable relationship cannot be stated.
15004-1989  allowed for the use of a so-called "permissible bearing pressure" for preliminary dimensioning, and for foundation design in case of buildings with low importance. With this method, the central, vertical limit load of strip foundations and column footings with a given geometry could be obtained by applying the permissible bearing pressure along with shape and depth factors. In the light of the popularity of this method, and given that EC7 allows for employing design methods based on prescriptive measures, the authors have developed a new calculation method which conforms to the principles of EC7 and which is similar to the former method.
In the forthcoming years intensive renovation and reconstruction works can be expected on the banks’ freshwaters of Hungary. For the rehabilitation of the shores of Lake Velence works are starting in 2020. To support these investments there has been a demand for prefabricated reinforced concrete sheet pile walls. Realizing the opportunity, a major player in the market of pre-fabricated reinforced concrete elements for water way construction, CSOMIÉP Ltd. decided to develop a reinforced concrete sheet pile wall. In this study the development and complex structural and geotechnical design concept are shown through the major structural behaviors and useable geometries.
Temperature change in soils and its possible effects date back to 20th century where temperature difference between laboratory and field for sampling made researchers interested in this topic. Due to development of technology and industry nowadays, new engineering applications such as nuclear waste disposal, oil extraction and pipelines, geothermal structures etc. have turned temperature change in soils to one of the high trending research topics where suitable knowledge of thermal effects on soils is required. For this purpose, it is tried at first to highlight the importance of temperature effect on geotechnical design by some examples and possible effect of temperature change on mechanical properties of fine soils are reviewed afterward. Investigation on results from literature proved that temperature change could alter some strength and consolidation parameters of fine soils. Different factors are proposed to be responsible for such thermally induced changes in mechanical parameters, however, existing explanations and comments from literature are diverse and not fully understood yet. In order to fill this gap, it is tried to find connections between different mechanical parameters and their behavior toward temperature change and possibly find a unified approach and factor to explain the mechanism responsible for thermally induced changes in mechanical parameters of fine soils. Finally, at the end, it is concluded that effect of temperature on structural rearrangement of solid particles could be a promising factor to connect the responses of different mechanical parameters toward temperature change.
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