Three-Dimensional Numerical Analysis of Piled Raft Fundations in Taipei Metropolitan
| Autor: | Zhi-Ming Cheng, 陳梓銘 |
|---|---|
| Rok vydání: | 2002 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 90 Piled raft systems are often suitable as foundations for large buildings in soft soil. This study investigates the raft-pile-soil interaction for vertically loaded raft on layered Taipei subsoil. Conventional design of piled-raft foundation ignores bearing effect of raft and considers entire load to be carried by the piles. In this study, the load capacity of raft as well as pile group in piled raft system considered by three-dimensional finite difference analysis. The required input parameters for the analysis were back-calculated from the static pile loading testing. The numerical result of static pile loading test by 3-D FDM simulation is compared with those obtained from the field test. Numerical results have been obtained for a series of numerical experiments to illustrate the influence of various raft thickness t, pile spacing s and loading intensity q on the performance of piled raft foundation in Taipei Metropolitan. It is considered that the pile is installed in a group, resting on bearing strata (sandstone bedrock) and uniformly loaded through a rigid (concrete) raft constructed at a typical excavation depth. The values of numerical variables considered in numerical experiments are t=1, 2 and 3m, s=2d, 3d and 4.5d (d=pile diameter=2m) and q=1,000, 750 and 400 kN/m2. The numerical evaluations are made in terms of load-settlement curve, load transfer curve, T-Z curve, settlement influence factor and bending moment for various cases. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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