Analysis of In-Situ Consolidation of Soil by Vacuum Combined Overburden Precompression Blowing and Filling

DOI

10.2991/978-94-6463-793-9_88How to use a DOI?

Keywords

vacuum combined loading pre-pressure method; pore water pressure; load ratio; blown-fill foundation

Abstract

Based on the monitoring data from a specific base's vacuum joint loading pre-pressure reinforcement project, this analysis delves into aspects such as surface settlement, layered settlement, pore water pressure, and horizontal displacement. The findings reveal that variations in the foundation soil layers of the blow-fill foundation lead to uneven final settlement; the maximum settlement rate during the vacuum stage reaches 18.2mm/d, significantly higher than in subsequent loading and joint loading stages. Additionally, settlement between 6m below the surface accounts for 71.1% of the total settlement, highlighting the effectiveness of the vacuum joint loading preloading method on shallow soil treatment. Furthermore, while increased load enhances soil effective stress, the pore water pressure at 6m depth decreases by -113kPa, surpassing the maximum negative pressure from the vacuum load, indicating the load's impact on the vacuum action process. Lastly, the outward and inward horizontal displacement ratios resulting from the vacuum combined load pre-pressure method correlate with the load ratio—the higher the load ratio, the greater the displacement ratio, and the shallower the critical depth.

Copyright

© 2025 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.

Download article (PDF)

TY  - CONF
AU  - Leiyong Yang
AU  - Zhu Liang
AU  - Qinghua Zhang
PY  - 2025
DA  - 2025/07/28
TI  - Analysis of In-Situ Consolidation of Soil by Vacuum Combined Overburden Precompression Blowing and Filling
BT  - Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
PB  - Atlantis Press
SP  - 1028
EP  - 1039
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-793-9_88
DO  - 10.2991/978-94-6463-793-9_88
ID  - Yang2025
ER  -