Numerical analysis of the seismic response of excavations supported by soldier pile walls in sand
DOI:
https://doi.org/10.4067/S0718-28132015000100009Keywords:
seismic response, soldier pile wall, finite elements, excavation, Bío Bío sandAbstract
A seismic response analysis of an excavation using a finite elements commercial program which considers the soil-wall interaction and the construction sequence effect, is presented for Bío Bío sand during the 27F/2010 earthquake. Results allow the conclusion that points around the excavation surface perimeter can reach maximum artificial acceleration values close to 0.52g and amplification factors close to 10, with relative horizontal displacements larger than 20 mm. The artificial response spectra obtained show small variations of the system fundamental period up to a depth of 12 m. Finally, it seems reasonable the use of the Ar parameter recommended by the national norm NCh3206 (2010) for excavation depths not deeper than 5 m. However, for excavations deeper than 10 m the seismic damage can increase due to the local geotechnical conditions and perturbations of the analyzed system.
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