Preliminary Validation of a Novel Method for the Assessment of Effective Stress State in Partially Saturated Soils by Cone Penetration Tests

Presti, Diego Carlo Lo; Stacul, Stefano; Meisina, Claudia; Bordoni, Massimiliano; Bittelli, Marco

doi:10.3390/geosciences8010030

Cited by 20 publications

(11 citation statements)

References 16 publications

(25 reference statements)

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“…SBTn profiles inferred by CPTm and CPTu tests were also compared with available borehole profiles. It was confirmed that the use of classification methods that were developed to interpret CPTu mainly causes the loss of sandy to silty liquefiable layers if applied to measured CPTm data [43,57]. Thus, the application of these correlations was shown to be useful to improve the capabilities in identifying the soil layering and liquefiable layers by CPTm.…”

Section: Soil Classification Index I C Correctionmentioning

confidence: 78%

Implementation and Use of a Mechanical Cone Penetration Test Database for Liquefaction Hazard Assessment of the Coastal Area of the Tuscany Region

Stacul

Magalotti

Baglione³

et al. 2020

Geosciences

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This paper describes the implementation and use of a mechanical cone penetration test (CPTm) database for the evaluation of the liquefaction potential in some areas of Tuscany. More specifically, the database contains 4500 CPTm covering an area of 1787 square km and mainly concerns some coastal areas of Tuscany. Available simplified liquefaction evaluation procedures (LEPs) are mainly based on piezocone CPT (CPTu) test results and not on CPTm. An early interest on developing LEPs with reference to CPTm became quite soon obsolete because of the widespread use of piezocone. Unfortunately, in Italy, the use of CPTm is very popular. After the 2012 seismic sequence of Emilia-Romagna, the use of CPTm for liquefaction risk analysis has seen a renewed interest, even though such a topic should require further studies. This paper shows an empirical approach for liquefaction triggering assessment by CPTm using existing LEPs, thus making possible the use of the developed CPTm database for the preliminary screening of the study area.

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Section: Soil Classification Index I C Correctionmentioning

confidence: 78%

Implementation and Use of a Mechanical Cone Penetration Test Database for Liquefaction Hazard Assessment of the Coastal Area of the Tuscany Region

Stacul

Magalotti

Baglione³

et al. 2020

Geosciences

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“…In this type of test, three independent penetration characteristics are registered continuously, selected profile depths, dissipation tests of pore water pressure excess, and in a cyclical manner, usually with a frequency of 1 m increase in penetration depth, seismic wave velocity measurements. The combination of registered test parameters introduced into advanced interpretation procedures enables precise assessment of the water conditions of sediments in relation to detailed stratigraphic and geotechnical identification of sediments in the profile of the performed research [9,14,15]. The main aim of the work is to demonstrate the qualitative advantage of SCPTU over the conventional piezometric method for the purposes of comprehensive monitoring of water conditions in the spigotted postflotation tailings storage facility.…”

Section: Study Areamentioning

confidence: 99%

The Application of the Seismic Cone Penetration Test (SCPTU) in Tailings Water Conditions Monitoring

Tschuschke

Gogolik

Wróżyńska

et al. 2020

Water

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The safe operation of the large, outflow Tailings Storage Facilities (TSF) requires comprehensive and continuous threat monitoring. One of the basic kinds of threat monitoring is to monitor the water conditions in deposited tailings, which is usually carried out using a conventional piezometric observation method from a network of installed piezometers. In complex tailings storage conditions, the reliability of the piezometric method may be questioned. The Seismic Cone Penetration Test (SCPTU) can meet high test standards. The results of the penetration tests closely identify conditions of sediments that determine the tailings water regime verified locally on the basis of pore water pressure dissipation tests. On the other hand, seismic measurements perfectly complement the characteristics of sediments in terms of their saturation. The analysis of the results of SCPTU implemented in the tailings massif also showed that below the phreatic surface, a zone of not fully saturated tailings can be found. Its presence improves the stability conditions of the tailings massif and dams, but also limits the possibility of the static liquefaction of tailings.

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“…2019, 9, 233 7 of 21 12 Effective vertical stress A proper assessment of the soil effective stress state is critical in many cases to identify a potential geotechnical hazard. Preliminary validation of a novel method for the assessment of effective stress state in partially saturated soils was proposed by Lo Presti et al in 2018 based on the interpretation of piezocone tests [46]. Loose soils are more susceptible to liquefaction than dense soils under the same effective stress.…”

Section: Standard Penetration Test Blow Countsmentioning

confidence: 99%

Interpretive Structural Modeling and MICMAC Analysis for Identifying and Benchmarking Significant Factors of Seismic Soil Liquefaction

et al. 2019

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Seismic soil liquefaction is considered as one of the most complex geotechnical earthquake engineering problems owing to the uncertainty and complexity involved in soil parameters, seismic parameters, and site condition factors. Each one of these parameters contains a variety of factors that trigger liquefaction and have varying degrees of importance. However, estimating accurate and reliable liquefaction-induced hazards requires identification and benchmarking of the most influential factors that control soil liquefaction. Seismic soil liquefaction factors were identified by Systematic Literature Review (SLR) approach and analyzed through Interpretive Structural Modeling (ISM) and the Cross-Impact Matrix Multiplication Applied to Classification (MICMAC) methodologies. The ISM model presented the relationships between fifteen seismic soil liquefaction factors and their benchmarking position from higher to lower-level significant factors in hierarchy. MICMAC is used to examine the strength of the relationship between seismic soil liquefaction significant factors based on their driving and dependence power. This research characterizes the identification and benchmarking of the seismic soil liquefaction factors and their relationships. The results show that the factors—duration of earthquake, peak ground acceleration, drainage condition, and standard penetration test (SPT) blow counts—influence seismic soil liquefaction directly and soil type is the governing factor that forms the base of the ISM hierarchy and consequently triggers seismic soil liquefaction. The results provide a more accurate way of selecting significant factors for establishment of seismic soil liquefaction potential and liquefaction-induced hazards risk assessment models.

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Preliminary Validation of a Novel Method for the Assessment of Effective Stress State in Partially Saturated Soils by Cone Penetration Tests

Cited by 20 publications

References 16 publications

Implementation and Use of a Mechanical Cone Penetration Test Database for Liquefaction Hazard Assessment of the Coastal Area of the Tuscany Region

Implementation and Use of a Mechanical Cone Penetration Test Database for Liquefaction Hazard Assessment of the Coastal Area of the Tuscany Region

The Application of the Seismic Cone Penetration Test (SCPTU) in Tailings Water Conditions Monitoring

Interpretive Structural Modeling and MICMAC Analysis for Identifying and Benchmarking Significant Factors of Seismic Soil Liquefaction

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