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2025 | OriginalPaper | Buchkapitel

Evaluation of the Impacts of Phased Excavation of Shield Tunnel on Adjacent Piled Raft Foundation of a Building

verfasst von : Mahendra Patel, Baleshwar Singh

Erschienen in: Proceedings of 9IYGEC 2023, Volume 2

Verlag: Springer Nature Singapore

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Abstract

In this study, a three-dimensional (3D) numerical modeling is carried out using the finite element software PLAXIS 3D to evaluate the induced deformations under the foundation of adjacent building due to the advancement of a slurry tunnel boring machine at different phases during excavation. The two construction parameters that have been varied are the face and the grout pressure in relation with earth pressure at rest at the tunnel axis level, which are called as the Earth pressure ratio (EPR) and the Grout pressure ratio (GPR) respectively. Ground settlement and lateral displacement of the pile are obtained for these EPR and GPR. Based on these results, polynomial regression equations are generated between both EPR and GPR with lateral displacement of pile and ground settlement for different phases during excavation, which determines the appropriate value of EPR and GPR. The obtained lateral pile deflection and ground settlement results are compared to those reported in the literature and a good agreement is found.

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Metadaten
Titel
Evaluation of the Impacts of Phased Excavation of Shield Tunnel on Adjacent Piled Raft Foundation of a Building
verfasst von
Mahendra Patel
Baleshwar Singh
Copyright-Jahr
2025
Verlag
Springer Nature Singapore
DOI
https://doi.org/10.1007/978-981-97-6988-9_19