چكيده به لاتين
One of the most controversial problems which threaten the stability of the foundations on saturated loose sand is liquefaction.
In this regard, it is expected that the inclusion of fibers can reduce the possibility of this kind of hazard. The current study, based on the technical literature, aims at experimentally quantifying the effects of reinforcement on preventing the occurrence of liquefaction and its related subsidence on loose sand.
The research was performed using a series of triaxial and shake table tests on sand-fiber mixed material under constant condition of soil density. It should be noted that the inclusion of fibers (PET) to sand was according to the percentage by volume of 0/1%, 0/3%, 0/5%, 1% and samples were prepared in triaxial and shake table apparatus by means of wet tamping and dry pluviation method, respectively.
Monotonic triaxial test results show that adding PET to sand causes no changes in liquefaction behavior of soil. However, the increment of fibers in soil samples confirmed the incremental trends in residual and maximum resistance of soil. Also, the results of shake table tests have clearly shown a significant improvement in the dynamic behavior of studied soil including reduction in related subsidence and pore water pressure and changes in drainage behavior by speeding it up.
