Sensitivity Analysis and Key Control Factors of Dynamic Compaction Vibration in Miscellaneous Fill Sites

DOI

10.2991/978-94-6463-688-8_26How to use a DOI?

Keywords

Miscellaneous fill; Dynamic compaction; Vibration velocity; Sensitivity analysis

Abstract

To examine the key factors influencing vibration reduction in dynamic compaction, the influence of vibration source distance, hammer height, tamping settlement, and falling distance at energy levels of 4000 kN·m, 12000 kN·m, and 25000 kN·m on a miscellaneous fill site was analyzed. Using the LIBSVM algorithm for modeling and Sobol sensitivity analysis, findings indicate that the primary vibration frequency centers around 15 Hz. Frequency fluctuation increases with tamping energy, but the main frequency remains largely stable. Vibration velocity decreases exponentially with distance from the vibration source, showing three attenuation zones: main (0–30 m), middle (30–60 m), and final (>60 m). Vibration velocity rises initially with hammer height, stabilizing optimally at 0.7 m, then declines in a negative exponential trend. Over cumulative tamping settlement, velocity follows three stages—rapid increase, gradual increase, and stabilization—due to factors like soil compactness, pit depth, and particle rearrangement. Characteristic vibration velocity peaks around an 18 m drop distance, then gradually diminishes. Sensitivity ranking indicates that hammer height and drop distance are the most significant factors, followed by vibration source distance and tamping settlement. Thus, in dynamic compaction design, controlling hammer height and drop distance optimally reduces vibration, while adjusting source distance and tamping settlement offers additional control.

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.

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TY  - CONF
AU  - Jianmin Zhu
AU  - Baozhi Dong
AU  - Yukun Wen
AU  - Yi Liang
PY  - 2025
DA  - 2025/04/30
TI  - Sensitivity Analysis and Key Control Factors of Dynamic Compaction Vibration in Miscellaneous Fill Sites
BT  - Proceedings of the 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)
PB  - Atlantis Press
SP  - 242
EP  - 257
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-688-8_26
DO  - 10.2991/978-94-6463-688-8_26
ID  - Zhu2025
ER  -