Francesco Castelli, Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso
The city of Noto belongs to a seismic area located on the eastern zone of Sicily (Italy). The following in situ investigations were carried out in order to determine the soil geotechnical characteristics: Down Hole (DH) tests, Dilatometer tests (DMT), Multichannel Analysis of Surface Waves (MASW) and geotechnical borings. Moreover the following investigations in the laboratory were carried out on undisturbed samples: Resonant Column, monotonic compression loading Triaxial tests and Direct shear tests. Finally synthetic seismograms have been drawn at the bedrock with the aim to perform the...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Francesco Castelli, Salvatore Grasso, Valentina Lentini, Maria Rossella Massimino
In this paper some information concerning the geotechnical characterisation of several sites of the city of Catania have been presented. In situ investigations of sandy harbour soils were therefore carried out in order to determine the soil profiles and the geotechnical characteristics for potential liquefaction evaluation under cyclic loading. The CPT results are generally more consistent and repeatable than results from other penetration tests. The continuous profiles i.e. for the city of Catania also allow a more detailed interpretation of soil layers and soil types. Thus the CPT can be...
TC4 International Workshop on Metrology for Geotechnics 2016
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Cláudio Pereira, José Granja, António Gomes Correia, Cristiana Ferreira, Miguel Azenha, Sohel Nazarian
Useful to define the stiffness of geomaterials at very small strains, the assessment of seismic wave velocities in the laboratory is currently a worldwide common practice. The combined use of piezoelectric transducers such as bender elements and accelerometers, already proved to be a simple but powerful laboratory tool for seismic wave measurements, helping decrease some subjectivity inherent to BE when used individually. Additionally, the simultaneous use of time and frequency domain signal analysis techniques is considered a useful alternative to reduce error in seismic wave measurements....
TC4 International Workshop on Metrology for Geotechnics 2016
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Camille Barral, Irini Djeran-Maigre, Patrick Pierson, Gérard Didier
The cap cover of a municipal solid waste landfill, must ensure the containment of the wastes, control rainwater infiltrations and limit biogas leakage to the atmosphere. The specific characteristics of the cap cover are necessary to be maintained during all the lifespan of the landfill, despite the loadings to which it is subjected to: mechanical stresses, hydraulic load changes, physico-chemical variations and changes of climatic conditions. The water transfer through the clayey geomaterials, geosynthetic clay liners (GCL) installed as capping in landfill, is studied at three different...
TC4 International Workshop on Metrology for Geotechnics 2016
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María F. García Martínez, Laura Tonni, Guido Gottardi
This paper presents the results of a number of variable rate piezocone tests (CPTU) carried out in the context of three independent site investigation campaigns on intermediate soil deposits. Attention is focused on the analysis of CPTU measurements in relation to the different penetration rates so as to identify drainage conditions during standard tests. Indeed, intermediate soils, typically including a large variety of mixed soil types, are generally characterized by permeability values within the range in which partial drainage is likely to occur during cone penetration and a...
TC4 International Workshop on Metrology for Geotechnics 2016
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Nozomu Yoshida, Kazue Wakamatsu
Relationships between soil type names written in the borehole logging data and fines content are investigated based on a statistical analysis of the estimation of the liquefaction strength determined without conducting a grain size analysis. Approximately 7700 borehole logging data sets were collected in the Miyagi Prefecture including Sendai City, Japan and approximately 1500 of these were selected for grain size analysis. These include 4409 results of grain size analyses and there are a total of 392 soil names. Soils were classified into 17 major soil types (gravel to clay, fill, surface...
TC4 International Workshop on Metrology for Geotechnics 2016
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Bonaventura Taiani, Settimio Ferlisi, Anders Samstad Gylland
This paper focuses on the use of field vane, a popular instrument for determining the undrained shear strength (su) of soft clays. In this regard, suitable corrections must be applied in order to adequately interpret the recorded measurements. Here the role played by some relevant factors (i.e.,anisotropy and strain-rate effects) in influencing su values is investigated on the basis of FEM numerical analyses carried out via the adoption of PLAXIS-3D software. The results of the numerical analyses generally fit with information provided by the scientific literature using independent...
TC4 International Workshop on Metrology for Geotechnics 2016
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K. H. Stokoe II, J. N. Roberts, S. Hwang, B. R. Cox, F. Y. Menq, S. van Ballegooy
Christchurch and the Canterbury region in New Zealand were devastated in 2010-2011 by a series of powerful earthquakes. The Christchurch area experienced widespread liquefaction that caused extensive damage. One critical problem facing the rebuilding effort is that the land remains at risk of liquefying in future earthquakes. Therefore, effective engineering solutions had to be developed to increase the resilience of homes and low-rise structures. To this end, a comprehensive series of full-scale field trials of multiple shallow ground improvement methods was performed. The field trials...
TC4 International Workshop on Metrology for Geotechnics 2016
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Costanza Cambi, Giulia Guidobaldi, Manuela Cecconi, Paola Comodi, Giacomo Russo
Some considerations upon the Initial Consumption of Lime (ICL) test, arisen from its use in the lime treatment of a pyroclastic soil, are presented.In the investigated material there are no ionexchanging minerals, such as zeolites. Therefore when this soil comes into contact with lime, no ion exchange processes are expected, and lime consumption is due to pozzolanic reactions. The standard ICL test was performed on this material treated with different lime percentages, and pH value was checked for the following 14 days. Atomic absorption analyses of unconsumed lime have been performed on...
TC4 International Workshop on Metrology for Geotechnics 2016
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Enza Vitale, Giacomo Russo, Dimitri Deneele
A relevant issue in the physical and hydromechanical behaviour of lime treated soil is the physico-chemical evolution of the system and its influence on the microstructural features of the treated soil. In the present study a multi-scale investigation on the short and long term effects of a lime treated kaolinite has been performed. Aim of the experimental work is the analysis of the link between the ongoing of the reactions induced by lime and the macroscopic evolution of soil properties. Some of the results obtained by means of oedometer tests on not treated and lime stabilised samples...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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