Numerical Simulations for Development of Liquefaction Countermeasures by Use of Partially Saturated Sand

Abstract eng:
The objective of this paper is to demonstrate the advantage of utilizing partially saturated sand for liquefaction countermeasure using the numerical analyses. To be specific, seismic response of liquefiable ground including partially saturated sand layer are investigated through numerical analyses, where the increase of liquefaction strength of partially saturated sand is considered. Three types of the ground model are prepared for the numerical analyses. Numerical analyses for each ground model are conducted in the two cases of different saturation of the sand layer. Therefore, two cases of the ground model consisting of the completely saturated sand layers, and the ground model where the completely saturated sand layers are replaced with the partially saturated sand layers are considered. That can discuss the effects of the partially saturated sand for liquefaction. Results show the advantage of utilizing the partially saturated sand for the reduction of seismic response of the ground. As a result, it can point out that utilizing the partially saturated sand can lead to the development of the new countermeasure for liquefaction.

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