Geological–geotechnical characterisation of Sarapuí II clay

Jannuzzi, Graziella Maria Faquim; Danziger, Fernando Artur Brasil; Martins, Ian Schumann Marques

doi:10.1016/j.enggeo.2015.03.001

Cited by 29 publications

(21 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The discussers point out that the data reported by Jannuzzi (2013) and Jannuzzi et al (2015) for very soft organic plastic, slightly overconsolidated Sarapuí II clay in Brazil can be used to validate the trends shown in our paper and fill some gaps between a plasticity index of 100% and 250%. Our reply aims to further examine and verify the analysis performed by the discussers, based on a number of in situ and laboratory test data from the very soft organic plastic clay site.…”

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 90%

“…Due to the difficulty in compiling the new data at the same depth, values obtained from the interpolated data corresponding to the depth interval of 0.5 m are used as two different types (i.e., (i) all data and (ii) a representative mean value). To normalize shear wave velocity, the water table is assumed to be just below ground surface (Almeida and Marques 2003;Jannuzzi et al 2015). The results of the new regression analyses are shown in eqs.…”

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 99%

“…D1 in Danziger and Jannuzzi (2017) with two different references: (i) trend line by 0.5 m depth intervals (1.5-8.0 m) and (ii) measured ␥ t . Because of the absence of measured ␥ t at depths below 8 m, a ␥ t value of 14.8 kN/m 3 corresponding to depth of 8 m is obtained from Jannuzzi et al (2015). Figure R1 shows the relationship between ␥ t and PI, including the discussers' data.…”

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 99%

See 2 more Smart Citations

Reply to the discussion by Danziger and Jannuzzi on “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Moon

2017

Can. Geotech. J.

View full text Add to dashboard Cite

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 90%

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 99%

Section: Sung-woo Moon and Taeseo Kumentioning

confidence: 99%

See 1 more Smart Citation

Reply to the discussion by Danziger and Jannuzzi on “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Moon

2017

Can. Geotech. J.

View full text Add to dashboard Cite

“…The geomorphological evolution of these areas has been comprehensively investigated using a combination of morphology, stratigraphic analysis of rotary push cores, vibracores and trenches with radiocarbon dating, taxonomic determination and taphonomic characterization of Holocene fossil mollusks (Guedes et al, 2011;Giannini et al, 1993Giannini et al, , 2007, as well as geotechnical site investigation testing data (e.g. Schnaid, 2005;Mantaras et al, 2014;Jannuzzi et al, 2015). Figure 1 is used to illustrate how a bay along the coast evolved over the last 8000 years (Giannini et al, 2010).…”

Section: Tubarão Coastline Sedimentsmentioning

confidence: 99%

Assessment of the Stress History of Quaternary Clay from Piezocone Tests

Odebrecht¹,

Schnaid²

2018

View full text Add to dashboard Cite

This paper highlights the importance of linking regional geology to geotechnical ground investigation when estimating the pre-consolidation pressure s' p of Quaternary clay deposits from piezocone tests. The work comprises a comprehensive site characterization from boring logs, piezocone tests and laboratory oedometer tests carried out at the Tubarão experimental testing site, in Southern Brazil. Geological characterization includes radiocarbon dating of samples from these clayey sediments. The approach developed at the testing site was later extended to 12 well characterized clay sites along the Brazilian coast to demonstrate that net cone penetration q t-s v0 can provide reliable estimations of pre-consolidation pressure s' p in Quaternary plastic, compressible, non-fissured clays. However, the s' p /(q t-s v0) ratio is not a constant (typically ranging from 0.1 to 0.4) and, as a consequence, pairwise parameter correlations considering s' p and q t-s v0 lead to inaccurate predictions. Independent assessment of the void ratio e 0 is needed in order to produce more realistic first order estimates of s' p from piezocone data.

show abstract

“…A number of in situ and laboratory tests have been performed recently at a new test site some 1.5 km from the previous one, named Sarapuí II, from which data have been reported by Jannuzzi (2013) and Jannuzzi et al (2015). Some properties of the material are presented in Fig.…”

Section: Fernando Artur Brasil Danziger and Graziella Maria Faquim Jamentioning

confidence: 99%

Discussion of “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Danziger

Jannuzzi

2017

Can. Geotech. J.

Self Cite

View full text Add to dashboard Cite

The authors have provided very useful correlations for the estimation of soil unit weight for a number of soils, based on a very large database (Moon and Ku 2016). However, in the specific case of clays, some gaps can be found, as stated by the authors: "Some missing data were due to a lack of information on the measured PI and e with respect to V s1 and V sn ." This is clearly observed in Figs. 7, 8a, and 8c in the paper under discussion, where no values are available from PI between 100% and 250%. Even for PI between 80% and 100% only three values are available in Figs. 8a and 8c. Also, it can be observed from Figs. 8b and 8d that few data are available for void ratio in the range 3-4.The discussers have performed a number of in situ and laboratory tests in a very soft organic, very plastic clay site, and the corresponding data can be used to fill some of the above-mentioned gaps, checking whether the authors' trends are valid in those PI and e ranges or different trends should be obtained.The Sarapuí site has been used extensively since the mid 1970s, and a comprehensive report of the data from the opening of this site until the 1980s has been provided by Almeida and Marques (2003). A number of in situ and laboratory tests have been performed recently at a new test site some 1.5 km from the previous one, named Sarapuí II, from which data have been reported by Jannuzzi (2013) and Jannuzzi et al. (2015). Some properties of the material are presented in Figure D2 presents the authors' data of total unit weight versus plasticity index (Fig. 7 in the paper), with the discussers' data included. The trend proposed by the authors for PI values greater than 100% was influenced by only three values, all of them having PI = 250%. It seems that a better trend would be slightly below the authors' trend line. In fact, the indicated trend (suggested by visual inspection only) seems to fit all of the data better, including the authors' data. Moreover, the data also indicate a much smaller dependence of PI on ␥ t for PI values greater than approximately 100%, and a trend of constant ␥ t values has been suggested in this region.Normalized V S1 values have been plotted versus plasticity index and void ratio in Figs. D3a and D3b, respectively (Figs. 8a and 8b in the paper). Again, the new data seem to indicate trends slightly below the authors' trends, as suggested in the figures, although as in the previous case based only on visual inspection. Site-specific normalized V Sn values for Sarapuí II clay could have been plotted as well, as the available data allow the corresponding evaluation. However, due to the limited size of this discussion, the analysis will be limited herein to V S1 values.As in the case of ␥ t versus PI, it seems that there is a threshold for the influence of PI on V S1 , which seems to occur for PI ϳ 150%. A different behaviour may be verified with respect to V S1 versus e. In fact, although the discussers' data indicate a trend slightly below the authors' trend, there seems to be no threshold for the void...

show abstract

Geological–geotechnical characterisation of Sarapuí II clay

Cited by 29 publications

References 13 publications

Reply to the discussion by Danziger and Jannuzzi on “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Reply to the discussion by Danziger and Jannuzzi on “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Assessment of the Stress History of Quaternary Clay from Piezocone Tests

Discussion of “Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils”

Contact Info

Product

Resources

About