@article{Narunat Heama_Pornkasem Jongpradist_Prateep Lueprasert_Suchatvee Suwansawat_2016, title={INVESTIGATION ON TUNNEL RESPONSES DUE TO ADJACENT LOADED PILE BY 3D FINITE ELEMENT ANALYSIS}, volume={12}, url={https://geomatejournal.com/geomate/article/view/1078}, abstractNote={<p>Underground structures are popularly utilized in urban development, especially tunnels for both<br>transportation and utilities. The interaction problem between existing tunnel and piles from new constructed<br>structures thus becomes unavoidable in dense population area. The tunnel loses its stability if the additional forces<br>and changed diameters (due to adjacent piles under loading) of tunnel lining are drastically high. This depends on<br>many factors, such as the clearance and pile tip level with respect to tunnel position. For preliminary assessment<br>during the first stage of design, it is necessary to estimate this impact. The concept of tunnel protection zone is<br>commonly adopted. However, to establish the tunnel protection zone for adjacent loaded pile, the understanding<br>on this interaction problem is essential. This study analyzes the effect of adjacent pile under loading on the<br>existing tunnel by 3D finite element method. The case study is the tunnel of MRTA project subjected to an<br>adjacent 1 m bored pile under loading with various lengths and clearances. The additional forces ( bending<br>moment and axial force) and the tunnel deformations are investigated. The results show that the additional forces<br>and the tunnel deformations decrease when the clearance increase and become insignificantly increasing when the<br>clearance is larger than 3.5 m. The distribution patterns of additional forces and tunnel deformation are similar.<br><br></p>}, number={31}, journal={GEOMATE Journal}, author={Narunat Heama and Pornkasem Jongpradist and Prateep Lueprasert and Suchatvee Suwansawat}, year={2016}, month={Nov.}, pages={63–70} }