Summary The paper shows a case study concerning the liquefaction potential assessment of deposits which mainly consist of non plastic silts and sands. The site under study has been characterized by means of in situ tests (CPTU, SPT and DPSH), boreholes and laboratory tests on undisturbed samples. Liquefaction susceptibility has been evaluated by means of several standard procedures prescribed by codes or available in technical literature. The evaluation of liquefaction potential has been carried out by means of different standard procedures based on in situ and laboratory tests. A qualitative estimation of possible damages to shallow structures has been obtained on the basis of indication contained in TC4-ISSMGE [1993]. In addition, quantitative effects of minor liquefaction phoenomena on shallow structures have been studied by means of simplified soil-foundation interaction. The main scope of the paper is to show that application of standard procedures for liquefaction susceptibility or liquefaction potential in areas of medium – low seismicity can lead to overemphasize the liquefaction problem. In addition, any liquefaction study should consider, at least in a simplified way, the effects of possible liquefaction on the shallow structures. In addition useful information about the liquefaction strength of silty sands is provided.
Lesson learned from liquefaction potential assessment of silty sand deposits in a case study in Italy
LO PRESTI, DIEGO CARLO;SQUEGLIA, NUNZIANTE
2011-01-01
Abstract
Summary The paper shows a case study concerning the liquefaction potential assessment of deposits which mainly consist of non plastic silts and sands. The site under study has been characterized by means of in situ tests (CPTU, SPT and DPSH), boreholes and laboratory tests on undisturbed samples. Liquefaction susceptibility has been evaluated by means of several standard procedures prescribed by codes or available in technical literature. The evaluation of liquefaction potential has been carried out by means of different standard procedures based on in situ and laboratory tests. A qualitative estimation of possible damages to shallow structures has been obtained on the basis of indication contained in TC4-ISSMGE [1993]. In addition, quantitative effects of minor liquefaction phoenomena on shallow structures have been studied by means of simplified soil-foundation interaction. The main scope of the paper is to show that application of standard procedures for liquefaction susceptibility or liquefaction potential in areas of medium – low seismicity can lead to overemphasize the liquefaction problem. In addition, any liquefaction study should consider, at least in a simplified way, the effects of possible liquefaction on the shallow structures. In addition useful information about the liquefaction strength of silty sands is provided.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
