Numerical assessment of laterally loaded Pile-Tunnel interaction | ||||
| Engineering Research Journal (Shoubra) | ||||
| Volume 51, Issue 2, April 2022, Page 200-211 PDF (1.56 MB) | ||||
| Document Type: Research articles | ||||
| DOI: 10.21608/erjsh.2022.242264 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Nasser M. Saleh1; Ahmad M. Adam2; Waleed A. Dawood3 | ||||
| 1Professor of Geotechnical Engineering, Civil Engineering Dep. Shoubra faculty, Benha University | ||||
| 2Teaching Assistant of Geotechnical Engineering, Civil Engineering Dep. Shoubra faculty, Benha University | ||||
| 3Assistant Professor of Geotechnical Engineering, Civil Engineering Dep. Shoubra faculty, Benha University | ||||
| Abstract | ||||
| Accurate simulation of Pile-Tunnel interaction is crucial for the prediction of tunneling induced forces on nearby piled foundation and pile loading induced loads on existing tunnel lining. Number of studies in the literature investigated tunneling effect on piles numerically, by centrifuge modeling or by field monitoring. However, the effect of piles on tunnels, especially laterally loaded ones, is not well understood. This paper describes the application of 3D finite element model (FEM) to predict pile loading, vertically and laterally, effect on a nearby existing tunnel. Back analysis of a case history of greenfield tunneling and building response using 3D FEM show good agreement between predicted and observed displacements. The FEM applicability to simulate Pile-Tunnel interaction problem is proved by back analysis of field case study. The results of parametric studies show that pile loading increase bending moment, axial compression force and induce new tension force on tunnel lining with different percentage depending on Pile-Tunnel configuration. An influence zone of Loaded pile effect on existing tunnel is identified by clearance of 2DT and HT/LP ratio of 1.25. However, lateral load effect is more significant through a clearance of DT and HT/LP ratio of 0.5. Lateral load on pile contributes by 50% of induced B.M, 17% of induced compression axial force, 2% of induced tension axial force on tunnel lining and 100% of lateral deformation. On the other hand, pile axial load causes about 95% of induced vertical deformation of tunnel lining. | ||||
| Keywords | ||||
| Piles; Tunnels; Finite element; Lateral load | ||||
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