Monotonic liquefaction resistance of silty sand reinforced with geotextile

摘要

Reinforcements can change the mechanical characteristics and liquefaction resistance of soils. The main purpose of this study is to realise the behaviour of static liquefaction of saturated silty sand reinforced by different arrangements of geotextile layers. Several series of undrained triaxial tests were conducted on reinforced and unreinforced saturated sand and sand mixed with varying amounts of silt (0-50%). Factors such as the silt content, arrangement and number of geotextile layers are discussed in this paper. The results indicate that by increasing the silt content up to about 35%, the static liquefaction resistance decreases in reinforced and unreinforced silty sand. With further increases in silt content from 35 to 50%, the liquefaction resistance increases. Also, it was found that geotextile inclusion increases the liquefaction . resistance of saturated sand for all silt contents examined. The results of this study are limited to the use of sand and silty sand reinforced with one type of nonwoven geotextile.