<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Tunnel construction below or adjacent to piles will affect the performance and eventually the stability of piles due to ground deformation resulting in the movement of piles and changes in the axial force distribution along the piles. A three dimensional finite element analysis using PLAXIS 3D (2013) was performed to study the behaviour of a single pile and 3 x 3 piles group during the advancement of shield tunnelling in ground. The 10-node tetrahedral elements were used to model both the soil and the tunnel lining. The Hardening Soil (HS) model was used to simulate the soil structure interaction at the tunnel-soil interface. An isotropic elastic model was used for the pile, piles cap, tunnel lining and tunnel boring machine shield (TBM). Several parametric studies were attempted including the longitudinal, lateral, and vertical tunnel location relative to pile embedded in different types of soil (clay or sand). The results showed that the pile head settlement increases during the tunnelling advancement in larger values than that for ground surface settlement. A zone of influence was determined in the range of twice the tunnel diameter in the longitudinal direction (forward and backward of the pile), and transverse direction (left and right of the tunnel centreline). If the tunnel boring is kept off this zone then there is no fear of pile collapse.</p></abstract>

Tunnel construction below or adjacent to piles will affect the performance and eventually the stability of piles due to ground deformation resulting in the movement of piles and changes in the axial force distribution along the piles. A three dimensional finite element analysis using PLAXIS 3D (2013) was performed to study the behaviour of a single pile and 3 x 3 piles group during the advancement of shield tunnelling in ground. The 10-node tetrahedral elements were used to model both the soil and the tunnel lining. The Hardening Soil (HS) model was used to simulate the soil structure interaction at the tunnel-soil interface. An isotropic elastic model was used for the pile, piles cap, tunnel lining and tunnel boring machine shield (TBM). Several parametric studies were attempted including the longitudinal, lateral, and vertical tunnel location relative to pile embedded in different types of soil (clay or sand). The results showed that the pile head settlement increases during the tunnelling advancement in larger values than that for ground surface settlement. A zone of influence was determined in the range of twice the tunnel diameter in the longitudinal direction (forward and backward of the pile), and transverse direction (left and right of the tunnel centreline). If the tunnel boring is kept off this zone then there is no fear of pile collapse.

Effect of Tunnel Progress on the Settlement of Existing Piled Foundation

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Effect of Tunnel Progress on the Settlement of Existing Piled Foundation"}

Tunnel construction below or adjacent to piles will affect the performance and eventually the stability of piles due to ground deformation resulting in the...

Effect of Tunnel Progress on the Settlement of Existing Piled Foundation

Article Category: Research Article

Publicado en línea: 28 jun 2019

Páginas: 102 - 113

Recibido: 18 jul 2018

Aceptado: 13 feb 2019

DOI: https://doi.org/10.2478/sgem-2019-0008

Palabras clave
Numerical modelling and analysis, piles, soil-structure interaction, tunnelling

© 2019 Raid Ramzi Al-Omari et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Effect of Tunnel Progress on the Settlement of Existing Piled Foundation

Article Category: Research Article

Publicado en línea: 28 jun 2019

Páginas: 102 - 113

Recibido: 18 jul 2018

Aceptado: 13 feb 2019

DOI: https://doi.org/10.2478/sgem-2019-0008

Palabras claveNumerical modelling and analysis, piles, soil-structure interaction, tunnelling

© 2019 Raid Ramzi Al-Omari et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Palabras clave
Numerical modelling and analysis, piles, soil-structure interaction, tunnelling