Evaluation of static liquefaction of fine sand in the Northern coastal area

Abstract

Soil liquefaction is one of the natural disasters that causes serious effects for construction works. Liquefaction is often considered a consequence of earthquakes, however, this disaster occurs even under normal conditions (static liquefaction). In Vietnam, due to not being located in the earthquake belt as well as economic conditions, the issue of liquefaction has not really been studied. In this paper, the authors conducted a series of monotonic triaxial tests on Hai An (Hai Phong) sand at consolidation pressures of 50kPa and 100kPa. The experimental results showed that this sand is capable of static liquefaction at low density, when the density index increases to 0.4, the sample is no longer liquefied but tends to dilatancy behavior.

Keywords: Static liquefaction; fine sand; peak of deviator; axial strain; triaxial test.