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Analytical Study on the Ground Settlement Induced by Pipe-roof Tunnelling Considering the Interaction between Socketed Pipes
https://orcid.org/http://orcid.org/0000-0001-7164-4135
https://orcid.org/http://orcid.org/0000-0001-6448-2086
https://orcid.org/http://orcid.org/0000-0003-3107-5454
https://orcid.org/http://orcid.org/0000-0002-5638-3456
Pipe-roof Pre-construction Method (PPM) is a pre-reinforcement method widely adopted in shallow large section tunnelling in the urban area. As one of the key indexes needed to be controlled, ground surface settlement and axis deviations induced by pipe-roof tunnelling attract increasing attention, but the interaction between socketed pipes (ISP), including shielding and constraint effects, has been lack of consideration in practice. By incorporating deformation coefficient and deviation coefficients, this paper proposed a new analytical method to account for the effect of ISP on the ground movement. Then, a numerical model to consider ISP and sequential jacking process was established and a series of simulations were carried out for a large pipe-roof tunnelling project. By comparing with the analytical results, the deviation coefficients were determined for the proposed model and the effect of ISP on the surface settlement was further revealed. Finally, the rationality and effectiveness of the proposed method were confirmed by contrasts with traditional methods and numerical calculations. The results show that an approximately 37% error rate could be reduced by the new method. This research is helpful for a better understanding of the effect of ISP, and therefore benefits the effective prediction and control of the surface settlement induced by pipe-roof tunnelling.
Analytical Study on the Ground Settlement Induced by Pipe-roof Tunnelling Considering the Interaction between Socketed Pipes
https://orcid.org/http://orcid.org/0000-0001-7164-4135
https://orcid.org/http://orcid.org/0000-0001-6448-2086
https://orcid.org/http://orcid.org/0000-0003-3107-5454
https://orcid.org/http://orcid.org/0000-0002-5638-3456
Pipe-roof Pre-construction Method (PPM) is a pre-reinforcement method widely adopted in shallow large section tunnelling in the urban area. As one of the key indexes needed to be controlled, ground surface settlement and axis deviations induced by pipe-roof tunnelling attract increasing attention, but the interaction between socketed pipes (ISP), including shielding and constraint effects, has been lack of consideration in practice. By incorporating deformation coefficient and deviation coefficients, this paper proposed a new analytical method to account for the effect of ISP on the ground movement. Then, a numerical model to consider ISP and sequential jacking process was established and a series of simulations were carried out for a large pipe-roof tunnelling project. By comparing with the analytical results, the deviation coefficients were determined for the proposed model and the effect of ISP on the surface settlement was further revealed. Finally, the rationality and effectiveness of the proposed method were confirmed by contrasts with traditional methods and numerical calculations. The results show that an approximately 37% error rate could be reduced by the new method. This research is helpful for a better understanding of the effect of ISP, and therefore benefits the effective prediction and control of the surface settlement induced by pipe-roof tunnelling.
Analytical Study on the Ground Settlement Induced by Pipe-roof Tunnelling Considering the Interaction between Socketed Pipes
https://orcid.org/http://orcid.org/0000-0001-7164-4135
https://orcid.org/http://orcid.org/0000-0001-6448-2086
https://orcid.org/http://orcid.org/0000-0003-3107-5454
https://orcid.org/http://orcid.org/0000-0002-5638-3456
Pipe-roof Pre-construction Method (PPM) is a pre-reinforcement method widely adopted in shallow large section tunnelling in the urban area. As one of the key indexes needed to be controlled, ground surface settlement and axis deviations induced by pipe-roof tunnelling attract increasing attention, but the interaction between socketed pipes (ISP), including shielding and constraint effects, has been lack of consideration in practice. By incorporating deformation coefficient and deviation coefficients, this paper proposed a new analytical method to account for the effect of ISP on the ground movement. Then, a numerical model to consider ISP and sequential jacking process was established and a series of simulations were carried out for a large pipe-roof tunnelling project. By comparing with the analytical results, the deviation coefficients were determined for the proposed model and the effect of ISP on the surface settlement was further revealed. Finally, the rationality and effectiveness of the proposed method were confirmed by contrasts with traditional methods and numerical calculations. The results show that an approximately 37% error rate could be reduced by the new method. This research is helpful for a better understanding of the effect of ISP, and therefore benefits the effective prediction and control of the surface settlement induced by pipe-roof tunnelling.
Analytical Study on the Ground Settlement Induced by Pipe-roof Tunnelling Considering the Interaction between Socketed Pipes
KSCE J Civ Eng
He, Junzuo (author) / Liao, Shaoming (author) / Tan, Yong (author) / Liu, Mengbo (author)
KSCE Journal of Civil Engineering ; 27 ; 417-430
2023-01-01
14 pages
Article (Journal)
Electronic Resource
English
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