EFFECTIVENESS OF CRASHED TILE IN COUNTERMEASURE AGAINST LIQUEFACTION

Abstract

: Liquefaction usually occurs in many sandy grounds during earthquake including Japan. Liquefaction causes damage of structures by making floatation or subsidence of them, and reduces the necessary performance of the structures. For example, stability of retaining wall based on skeleton weight of the structure is reduced due to subsidence and inadequate support which causes the destabilization of the structure. In addition, the light weight underground structure suffers damage such as floating due to the reduction of shear strength of soils during liquefaction. The damage occurs not only to the civil engineering
structures (roads, bridges, etc.) but also to the residential buildings which makes the building unusable. On the other hand, Aichi Prefecture (Japan) is a center of the production of tiles where the crushed tile can be used as recycling materials for a measure of soil liquefaction. In this research, we have investigated the material property of the crushed tile and examined the effectiveness of countermeasure against liquefaction by shaking table tests. It is found that liquefaction of the ground can be reduced using crushed tiles because of its high friction and drainage properties. In the research, we found that the anti-liquefaction manhole which was backfilled by clashed tile floated only by 1/3 of the magnitude observed in the case of without countermeasure
against liquefaction.