04038nas|a2200409 i 4500 20260818113850.0 191199s1999 th uu m rtt 00| a1eng d .b11765008 AIT Thesis no. GE-98-22 Kim, Han Ki Finite element analysis of soft ground improved by prefabicated vertical drains Bangkok : Asian Institute of Technology, 1999 105 leaves Thesis ; no. GE-98-22 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1999 This study performed a detailed investigation on FEM analysis of unit cells and full scale PVD (Prefabricated Vertical Drain) improved ground with embankment surcharge loading. Interface element was introduced to simulate ve1tical drain with finite permeability to take well resistance into consideration. Based on equivalent discharge rate under confined flow condition, an equivalent horizontal permeability was determined to consider smear effect. Fmthermore, FEM analysis incorporated with the proposed matching schemes were performed on axisymmetric unit cell. The numerical results were compared with the theoretical solutions from Zeng (1988). Excellent agreements are found in comparisons. Consequently, the effectiveness of the proposed matching schemes is identified. A series of parametric studies based on the proposed matching scheme, were performed for two layered unit cell and the evaluation of well resistance. The numerical results of two layered unit cell were compared with the theoretical solutions from Onoue (1988). Excellent agreements further identify the applicability of the proposed matching schemes to the multi-layered ground improved by PVD. However, according to the numerical results, the well resistance factor proposed by Hansbo (1979) overestimates the well resistance of vertical drain with shorter installation length. In addition, the proposed matching schemes were employed to convert actual radial flow to two-dimensional plane strain flow based on the equivalent average degree of consolidation and discharge capacity of vertical drain. Well resistance is automatically considered by interface elements, which possesses equivalent discharge capacity to vertical drain in axisymmetric case. Meanwhile, the smear effect proposed by Hird et. al (1992) was also included in the analysis. Eventually, the proposed matching schemes were applied to full scale PVD improved ground with embankment surcharge loading. The evaluation of well resistance was carried out in term of consolidation rate. The numerical results show that significant well resistance existed during consolidation process in the full scale test embankment. Finite element method Soil consolidation Der Guey, Lin, Chairperson Bergado, Dennes T., Examination Committee Noppadol Phien-Wej, Examination Committee Asian Institute of Thesis ; no. GE-98-22 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12520 .b11765008 mnait y 240420 0 991119 m a y 0 mnait mnait mnarc 20 40 Barcode : 30050120717128 CREATED : 1998-06-22 RECORD # : i1216382x LPATRON : 1012150 LCHKIN : 2002-11-04 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 4 TOT CHKOUT : 5 TOT RENEW : 1 Barcode : 30050120717102 CREATED : 1998-06-22 RECORD # : i12163831 LPATRON : 1010999 LCHKIN : 2006-05-11 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 5 TOT CHKOUT : 11 TOT RENEW : 15 Barcode : 30050160080809 CREATED : 2016-05-17 RECORD # : i1297996x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 44858 44858 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. GE-98-22 30050120717128 2026-08-18 11:38:50 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. GE-98-22 30050120717102 2026-08-18 11:38:50 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. GE-98-22 30050160080809 2026-08-18 11:38:50 1 2026-08-18 40