الفهرس 
chapter 1Only 14 pages are availabe for public view
 |  | from | 412 |  |  |
| | | from | 412 | | |
Abstract
Some special engineering structures like bridges; off shore structures and oil platform need a special care in designing its high loading demand and the peculiarity of the soil on which they constructed. The best engineering solution to such situation is the use of pile foundation. It has been advanced that the lateral deflection of pile group and maximum bending moment in the most heavily loaded pile in the group, controlling its design. br Herein, we studied such factors and also the effect of group interaction on soil resistance distribution in fine-grained soil. In this study we used analytical and theoretical approaches. In the analytical approach, non-liner elastic-plastic finite elements program (pile3D) has been developed to simulate the plastic behavior of sand soil. A model adopted -#102;-#114;-#111;-#109; provost (1993) was selected. A various geotechnical loading and boundary condition including water table, in situ stress and formation of gap at soil pile interface, have been implemented. An experimental investigation was performed on (12.5) mm diameter aluminum model pile with 100 cm length, the behavior of four different configurations models (i.e. 2x1 group, 5-pile group and 3x3 group) are investigated in reference to four different lateral loads. All piles in model groups were extensively instrumented so that variation in soil resistance within the group could be determined.