Dynamic behaviour of saturated sandy soil reinforced with non-woven polypropylene fibre

摘要

This research presents results of shaking table tests which were carried out on the soil reinforcement with randomly distributed synthetic fibres. The main scope of the study is to investigate the reliability and performance of polypropylene fibres in improving liquefaction resistance of loose sand prone to liquefaction. Dynamic properties of reinforced sand such as shear modulus and damping ratio were obtained, analysed and compared to those of unreinforced sand. The results indicated that shear modulus and damping ratio are increased by adding fibrous materials as a reinforcement to the host sandy soil. However, no meaningful improvement was achieved by reducing pore water generated during shaking. Outcomes also demonstrated that liquefaction-induced settlement is slightly higher in reinforced soil when compared to unreinforced soil.