TY - GEN
T1 - Simplified Elastic Approach for Three-Dimensional Pile Group Displacements Induced by Nearby Tunneling Operation
AU - Leung, Andy Y.F.
AU - Sun, Qianchen
AU - Chen, Xiaoyu
N1 - Funding Information:
Acknowledgements. The work presented in the paper is financially supported by Research Grants Council of Hong Kong (Project No. 15220415).
Publisher Copyright:
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2021/1
Y1 - 2021/1
N2 - This paper introduces a simplified method to obtain the three-dimensional soil displacement field caused by tunneling, which is subsequently applied to the analyses of piled foundations nearby. Soil displacements around the tunnel heading are idealized by the spherical contraction model, while the cylindrical contraction model is adopted to simulate the response far away from the heading. The two deformation mechanisms are combined through a shape function, with the parameters determined using a heuristic algorithm and comparisons with numerical analyses. To validate the proposed approach, the displacement fields estimated by the simplified solution and the pile group analyses are compared with three-dimensional finite difference simulations, and favorable comparisons are obtained for ground movements, pile deflections, axial forces and bending moments. The proposed approach is computationally efficient, and the presented work forms the basis which can be further explored to develop design charts for deformation parameters under various tunnel geometries and soil conditions. These may then be used for quick evaluation of the complete displacement field around the tunnel.
AB - This paper introduces a simplified method to obtain the three-dimensional soil displacement field caused by tunneling, which is subsequently applied to the analyses of piled foundations nearby. Soil displacements around the tunnel heading are idealized by the spherical contraction model, while the cylindrical contraction model is adopted to simulate the response far away from the heading. The two deformation mechanisms are combined through a shape function, with the parameters determined using a heuristic algorithm and comparisons with numerical analyses. To validate the proposed approach, the displacement fields estimated by the simplified solution and the pile group analyses are compared with three-dimensional finite difference simulations, and favorable comparisons are obtained for ground movements, pile deflections, axial forces and bending moments. The proposed approach is computationally efficient, and the presented work forms the basis which can be further explored to develop design charts for deformation parameters under various tunnel geometries and soil conditions. These may then be used for quick evaluation of the complete displacement field around the tunnel.
KW - 3D displacement field
KW - Cavity contraction
KW - Soil-pile interaction
KW - Tunneling
UR - https://www.scopus.com/pages/publications/85101499120
U2 - 10.1007/978-3-030-64518-2_22
DO - 10.1007/978-3-030-64518-2_22
M3 - Conference article published in proceeding or book
AN - SCOPUS:85101499120
SN - 9783030645175
T3 - Lecture Notes in Civil Engineering
SP - 181
EP - 188
BT - Challenges and Innovations in Geomechanics - Proceedings of the 16th International Conference of IACMAG - Volume 2
A2 - Barla, Marco
A2 - Di Donna, Alice
A2 - Sterpi, Donatella
PB - Springer Science and Business Media Deutschland GmbH
T2 - 16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021
Y2 - 5 May 2021 through 8 May 2021
ER -