Consolidation Effect and Influencing Factors of Dynamic Compaction for Filling Subgrade

Abstract:

The parameters of dynamic compaction impacting on consolidation effect such as fall-height of hammer, impact mode, impact space, etc. are analysed by dynamic FEM method. The method of choosing parameters of dynamic compaction and consolidation effect of dynamic compaction on filling subgrade are illuminated by field test. Conclusions are drawn: with the increase of impact energy, the range of plastic deformation zone will extend to a certain depth in subgrade, which will certainly expand the effective reinforcement range of subgrade; optimal impact times of a subgrade is available; the consolidate depth and influencing area by light hammer with heavy impact is less than that by heavy hammer with light impact when impact energy is equal; with the increase of hammer diameter, both deformation and strain of subgrade reduce under the same impact energy.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 1617-1621
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.1617
• Online since: October 2012
• Authors: Yang Jiang, Yue Xin She, Wen Bin Sun, Bao Hai Chen, Hua Rong Shen
• Keywords: Consolidation Effect, Dynamic Compaction, Dynamic FEM, Filling Subgrade, Influencing Factor

References

[1] Yifeng Gao, Hejun Chai and Jianguo Yang: Technology of Highway and Transport Vol. 20 (2003), p.8 (In Chinese).

[2] Peng Jiang, Rongqiang Li and Defang Kong: Chinese Journal of Geotechnical Engineering Vol. 20 (2000), p.222 (In Chinese).

[3] Yuanqiang Cai, Renwei Chen and Changjie Xu: Journal of Zhejiang University (Engineering Science) Vol. 39 (2005), p.65 (In Chinese).

[4] Jiyong Zhu, Guangquan Xu and Gupei Gong: Coal Geology and Exploration Vol. 29 (2001), p.39 (In Chinese).

[5] Changhai Jin: Rock and Soil Mechanics Vol. 8 (1987), p.31 (In Chinese).

[6] Fumin Li, and Yong Sun: Journal of Southeast University (Natural Science Edition) Vol. 32 (2002), p.809 (In Chinese).