Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments
In this paper, the law of ice-rich permafrost embankment thaw consolidation is studied based on three-dimensional nonlinear large strain thaw consolidation theory. To avoid problems associated with numerical simulation efficiency and stability when a nonlinear stress-strain relationship is employed,...
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ftrepec:oai:RePEc:hin:jnlmpe:5561302 2024-04-14T08:12:55+00:00 Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments Gaosheng Yang Peipei Chen Guoqing Cai http://downloads.hindawi.com/journals/MPE/2021/5561302.pdf http://downloads.hindawi.com/journals/MPE/2021/5561302.xml unknown http://downloads.hindawi.com/journals/MPE/2021/5561302.pdf http://downloads.hindawi.com/journals/MPE/2021/5561302.xml article ftrepec 2024-03-19T10:40:24Z In this paper, the law of ice-rich permafrost embankment thaw consolidation is studied based on three-dimensional nonlinear large strain thaw consolidation theory. To avoid problems associated with numerical simulation efficiency and stability when a nonlinear stress-strain relationship is employed, a segment interpolation function is used to implement the nonlinear relationship between the compression modulus and the void ratio, and the corresponding simulation strategy is proposed. Through a comparison of the monitoring and calculated results, it is indicated that the calculation accuracy on ice-rich embankment thaw settlement can be notably improved after nonlinear theory is implemented with the proposed numerical simulation method. A further analysis of the calculated results indicates that the interactive effects between the thermal and mechanical fields can be more reasonably described by nonlinear theory than by linear theory. It is also determined that the postthaw pore water in the shallow embankment dissipates in the early operation period, while in the following long operation period, the development of the permafrost embankment thaw settlement is mainly due to the dissipation of newly postthaw pore water at the thaw depth or the permafrost table. This is one of the main differences in the law of permafrost embankment thaw settlement compared with that of unfrozen embankments. Article in Journal/Newspaper Ice permafrost RePEc (Research Papers in Economics) |
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Open Polar |
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RePEc (Research Papers in Economics) |
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In this paper, the law of ice-rich permafrost embankment thaw consolidation is studied based on three-dimensional nonlinear large strain thaw consolidation theory. To avoid problems associated with numerical simulation efficiency and stability when a nonlinear stress-strain relationship is employed, a segment interpolation function is used to implement the nonlinear relationship between the compression modulus and the void ratio, and the corresponding simulation strategy is proposed. Through a comparison of the monitoring and calculated results, it is indicated that the calculation accuracy on ice-rich embankment thaw settlement can be notably improved after nonlinear theory is implemented with the proposed numerical simulation method. A further analysis of the calculated results indicates that the interactive effects between the thermal and mechanical fields can be more reasonably described by nonlinear theory than by linear theory. It is also determined that the postthaw pore water in the shallow embankment dissipates in the early operation period, while in the following long operation period, the development of the permafrost embankment thaw settlement is mainly due to the dissipation of newly postthaw pore water at the thaw depth or the permafrost table. This is one of the main differences in the law of permafrost embankment thaw settlement compared with that of unfrozen embankments. |
format |
Article in Journal/Newspaper |
author |
Gaosheng Yang Peipei Chen Guoqing Cai |
spellingShingle |
Gaosheng Yang Peipei Chen Guoqing Cai Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
author_facet |
Gaosheng Yang Peipei Chen Guoqing Cai |
author_sort |
Gaosheng Yang |
title |
Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
title_short |
Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
title_full |
Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
title_fullStr |
Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
title_full_unstemmed |
Nonlinear Analysis of the Thaw Settlement in Ice-Rich Embankments |
title_sort |
nonlinear analysis of the thaw settlement in ice-rich embankments |
url |
http://downloads.hindawi.com/journals/MPE/2021/5561302.pdf http://downloads.hindawi.com/journals/MPE/2021/5561302.xml |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
http://downloads.hindawi.com/journals/MPE/2021/5561302.pdf http://downloads.hindawi.com/journals/MPE/2021/5561302.xml |
_version_ |
1796310759402110976 |