Method for Estimating the Degree of Improvement in Soil between Adjacent Tamping Locations under Dynamic Compaction
Publication: International Journal of Geomechanics
Volume 19, Issue 12
Abstract
Real dynamic compaction (DC) sites are composed of a series of tamping locations. However, previous studies mainly focused on single-location tamping and paid little attention to the influence of adjacent tamping locations. This paper proposes a method for estimating the degree of final soil improvement with depth in the compacted area between adjacent tamping locations. Extensive numerical parametric studies were conducted to investigate the influence of each parameter on the degree of soil improvement. Based on the results obtained, dimensionless correlations between the relative density increment ratio at certain depths and combinations of soil and construction parameters were performed with the dimensional analysis method. Then, the dimensionless correlations, together with the crater depth and depth of improvement, were used to determinate a prediction curve to describe the variation in the degree of improvement with depth along the midline between adjacent tamping locations. The reliability of the proposed formula was examined by comparing its predictions with the measured results. Finally, the applicability of the proposed formula for the determination of construction parameters was illustrated using the Changi DC treatment project.
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Acknowledgments
This research is supported and financed by the National Natural Science Foundation of China (Nos. 41330633, 51679134, and 41727802) and Jiangxi Provincial Education Department Science and Technology project of China (No. GJJ170399) and Jiangxi Provincial Natural Science Foundation of China (No. 20181BAB216030). The authors are very grateful for the research support from the late professor Jianhua Wang (Shanghai Jiao Tong University).
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Published In
International Journal of Geomechanics
Volume 19 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 27, 2018
Accepted: May 14, 2019
Published online: Oct 14, 2019
Published in print: Dec 1, 2019
Discussion open until: Mar 14, 2020
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