In situ measurements for evaluating liquefaction potential under cyclic loading |
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| Francesco Castelli, Salvatore Grasso, Valentina Lentini, Maria Rossella Massimino |
- Abstract:
- 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 used to develop preliminary soil and liquefaction resistance profiles for site investigations. Semi-empirical procedures for liquefaction evaluations originally have been also developed using the Standard Penetration Test (SPT) to differentiate between liquefiable and nonliquefiable sites. Criteria for evaluation of liquefaction resistance based on standard penetration test (SPT) blowcounts have been rather robust over the years. Seismic Dilatometer Marchetti Tests (SDMT) have been also carried out, with the aim to evaluate the soil profile of shear wave velocity (Vs) and the horizontal stress index (Kd). The available data obtained from the Seismic Dilatometer Marchetti Tests results enabled also to evaluate the potential liquefaction. The Seismic Dilatometer Marchetti Test (SDMT) has the advantage, in comparison with CPT and SPT tests, to measure independent parameters, such as the Horizontal Stress Index (Kd) and the shear wave velocity (Vs). The use of the shear wave velocity, VS, as an index of liquefaction resistance, illustrated by several authors, has been also compared with the other approaches based on CPT, SPT or SDMT test results on sandy soils for potential liquefaction evaluation.
- Keywords:
- Liquefaction, Hazard, Potential, Seismic, Earthquake
- Download:
- IMEKO-TC4-GEO-2016-14.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 International Workshop on Metrology for Geotechnics 2016
- Title:
1st IMEKO TC4 International Workshop on Metrology for Geotechnics
- Place:
- Benevento, ITALY
- Time:
- 17 March 2016 - 18 March 2016