| 摘要 | 第1-5页 |
| Abstract | 第5-8页 |
| 1 Introduction | 第8-11页 |
| ·Background | 第8-9页 |
| ·Objectives | 第9-10页 |
| ·Main contents of research | 第10-11页 |
| 2 Background theory and literature review | 第11-25页 |
| ·Introduction | 第11页 |
| ·Tunneling induced ground movements | 第11-20页 |
| ·Influence of a tunnel excavation on pile | 第20-25页 |
| 3 Modeling of tunnel in stiff clay | 第25-32页 |
| ·Introduction | 第25-26页 |
| ·Finite Element Mesh | 第26-28页 |
| ·Initial and boundary conditions | 第28-29页 |
| ·Model parameters | 第29-31页 |
| ·Modeling Procedure | 第31-32页 |
| 4 Tunneling effect on existing pile group for case C/D =2.5 | 第32-42页 |
| ·Introduction | 第32页 |
| ·Determination of the axial load carrying capacity of the pile group | 第32-33页 |
| ·Surface settlement | 第33-34页 |
| ·Pile group settlement and loss of capacity due to tunneling | 第34-36页 |
| ·Tilting of pile cap due to tunnel advancement | 第36页 |
| ·Load transfer within the pile group at various tunneling stages | 第36-38页 |
| ·Stress changes in the soil due to tunnel advancement | 第38-39页 |
| ·Tunneling-induced bending moment along piles | 第39-40页 |
| ·Generation of excessive pore water pressure due to tunneling | 第40-42页 |
| 5 Comparison of the results | 第42-54页 |
| ·Introduction | 第42页 |
| ·Surface settlement trough | 第42-43页 |
| ·Pile group settlement and loss of capacity due to tunneling | 第43-45页 |
| ·Tilting of pile cap due to tunnel advancement | 第45-47页 |
| ·Load transfer within the pile group at various tunneling stages | 第47-49页 |
| ·Stress changes in the soil due to tunnel advancement | 第49-50页 |
| ·Tunneling-induced bending moment along piles | 第50-52页 |
| ·Generation of excessive pore water pressure due to tunneling | 第52-54页 |
| 6 Conclusions and suggestions | 第54-56页 |
| ·Conclusions | 第54-55页 |
| ·Suggestions | 第55-56页 |
| Acknowledgement | 第56-57页 |
| References | 第57-60页 |
