Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Geomechanics and Engineering Volume 27, Number 2, October25 2021 , pages 151-165 DOI: https://doi.org/10.12989/gae.2021.27.2.151 |
|
|
|
Comparative effects of adjacent loaded pile row on existing tunnel by 2D and 3D simulation models |
||
Narunat Heama, Pornkasem Jongpradist, Prateep Lueprasert,
Suchatvee Suwansawat and Pitthaya Jamsawang
|
||
| Abstract | ||
| Selecting suitable simulation methods for complex problems requires a careful balance between the predicted accuracy and computational effort. This research comparatively investigated the effects of adjacent loaded pile row on an existing tunnel in terms of tunnel deformation and lining force, displacement of soil surrounding between tunnel and pile and load transfer of the pile. Simulations were carried out by eight simulation models consisting of 3D finite element (FE) full models (model 1-2); 3D FE symmetry models (model 3-4); and a pile wall in 2D FE models (models 5-8). In loaded pile row simulation, simulations were performed with two pile types: volume pile and embedded pile. In 2D simulation, the 3D pile row was converted into 2D pile wall under plane strain condition by using three transformation methods. The results show that the predicted tunnel responses are adequately accurate as long as the reasonable soil movement behavior can be reproduced. The 2D equivalent dimensions and 2D equivalent axial rigidity are recommended since they provide conservative estimation on both tunnel deformation and lining forces. The 2D equivalent flexural rigidity is not recommended if the pile response is also of concern. The novelty of this research lies in the use and discussion on the applicability of various 2D and 3D models to simulate the effects of adjacent loaded pile row on the existing tunnel, as opposed to previous studies which focused on one or two simulation models. | ||
| Key Words | ||
| 2D Finite element method; 3D Finite element method; adjacent loaded pile row; existing tunnel; tunnel response | ||
| Address | ||
| Narunat Heama,Prateep Lueprasert and Suchatvee Suwansawat: Department of Civil Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand Pornkasem Jongpradist: Construction Innovations and Future Infrastructures Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok, Thailand Pitthaya Jamsawang: Soil Engineering Research Center, Department of Civil Engineering, King Mongkut's University of Technology North Bangkok, Thailand | ||