Study on Nonlinear Consolidation of Vacuum Preloading in Shallow Layer of New Dredger Fill Ultra-Soft Foundation

DOI

10.2991/978-94-6239-682-1_23How to use a DOI?

Keywords

Ultra-soft soil; no sand cushion vacuum preloading method; nonlinear consolidation theory

Abstract

The ultra-soft soil foundation is widely distributed in coastal areas, and the vacuum preloading method without sand cushion is often used to reinforce the shallow surface layer. Based on the microscopic pore compression mechanism and non-Darcy seepage characteristics, a non-linear consolidation model of vacuum preloading without sand cushion considering the dynamic changes of permeability coefficient and void ratio with effective stress is established. The model takes the point source load as the boundary condition, and the analytical solution is obtained by the separation variable method and the impulse method. Based on the field test of the offshore wharf of Nansha Port in Guangzhou Port, the field verification is carried out. The results show that the error of the predicted consolidation degree of the model is only 18.09%, which is significantly lower than 39.53% of the Terzaghi theory, and the measured consolidation degree of 89% and the residual settlement of 0.074 m meet the design requirements.It is proved that the model can effectively characterize the microstructure evolution and pore water pressure dissipation of ultra-soft soil during vacuum preloading. It has important theoretical value and engineering application prospect, and can be further verified in other dredger fill sites.

Copyright

© 2026 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Shuqing Sun
AU  - Yao Xie
AU  - Hourong Mao
AU  - Fei Niu
PY  - 2026
DA  - 2026/06/30
TI  - Study on Nonlinear Consolidation of Vacuum Preloading in Shallow Layer of New Dredger Fill Ultra-Soft Foundation
BT  - Proceedings of the 2025 7th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2025)
PB  - Atlantis Press
SP  - 227
EP  - 242
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6239-682-1_23
DO  - 10.2991/978-94-6239-682-1_23
ID  - Sun2026
ER  -