Parametric analysis of geosynthetic reinforced and pile supported embankment

摘要

To investigate the performance of pile supported embankment, five key influencing factors are chosen for parametric study. The influencing factors include the peak length of pile cap, pile diameter, pile spacing, elastic modulus of pile and tensile stiffness of geosynthetic. The settlement at the embankment crest and the lateral displacement are investigated. The results show that the elastic modulus of pile has a significant influence on the settlement and lateral displacement when the elastic modulus of pile increases from 100 to 5000 MPa. However, the influence is not obvious when the elastic modulus of pile increases beyond 5000 MPa. As the pile spacing increases, the settlement and lateral displacement decrease significantly at first, but the influence of pile spacing becomes less important again when the pile spacing exceeds 4.0 m. The tensile stiffness of geosynthetic has a significant influence on the differential settlement. However, the lateral displacement is reduced limitly with the increase of tensile stiffness of geosynthetic.