NUMERICAL STUDY ON DEFORMATION CHARACTERISTICS OF FIBRE REINFORCED LOAD TRANSFER PLATFORM AND COLUMNS SUPPORTED EMBANKMENTS
In this investigation, a ground modification technique utilising fibre-reinforced-load-transfer-platform (FRLTP) and column-supported (CS) embankment constructed on multilayered soft soils is proposed and investigated. After validating the proposed model with published data in the literature, numerical analysis was firstly conducted on the two-dimensional finite element model of a CS embankment without or with FRLTP to examine the influence of the FRLTP inclusion into the CS embankment system. Secondly, an extensive parametric study was performed to further investigate the effects of the FRLTP essential parameters including platform thickness, shear strength and tensile strength properties, and deformation modulus on the embankment performance during the construction and post-construction stages. Additionally, the influence of the embankment design parameters such as column spacing, column length and diameter was also examined. The numerical results reveal that the FRLTP inclusion can be effective in enhancing the CS embankment behaviour. It is also found that when increasing the platform thickness, the shear strength properties of FRLTP plays a significant role in improving the overall performance of a column-embankment with FRLTP.