Author(s)

ENAYAT MALLYAR, KAKUTA FUJIWARA

Abstract

In many coastal areas, port facilities such as retaining walls were highly damaged due to earthquakes. Deformation of retaining walls is one of the primary sources of damage in the port facilities. The liquefaction of the backfill causes a large lateral force to the walls, which is triggered by the wall’s displacement. The retaining wall has been constructed widely and required to be resistant during earthquake motion. Several effective countermeasures to mitigate liquefaction have been proposed. Using piles as a countermeasure nearby the retaining walls has been proposed that the displacement of the retaining walls could be reduced. However, the high rigid material pile is required high cost. Therefore, the authors conducted a series of shaking model tests in three cases with different high rigid and low rigid types of piles to investigate the effectiveness of piles against the deformation of the retaining wall. The deformation of the retaining wall, caused by liquefied soil, was obtained by the sensors measurement and it is shown that even mix (high rigidity and low rigidity) piles in the backfill could effectively reduce the wall displacement.

Keywords

retaining wall, pile countermeasure, shaking table test, earthquake