›› 2009, Vol. 30 ›› Issue (4): 871-878.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Mesomechanical analysis of characteristics of dry sands in response to dynamic compaction with PFC2D

JIA Min-cai 1,2，WANG Lei1，ZHOU Jian 1,2   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key laboratory of Geotechnical & Underground Engineering. of Education Ministry, Tongji University, Shanghai 200092, China
  • Received:2008-10-17 Online:2009-04-10 Published:2011-01-30

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Abstract:

Based on the similarity theory, the numerical analysis model is established to study the mechanism of dynamic compaction of dry sands by means of secondary exploitation using the PFC2D (particle flow code in 2 dimensions). Dynamic response characteristics of dry sands to impacting are simulated in combination with laboratory mesomechanical model test. The availability and rationality of the proposed numerical method is verified by comparing the numerical solutions with the results of real data. The results show that the dynamic stress of tamper bottom can be well simulated with PFC2D as well as dynamic stress among sand grains and displacement field during dynamic compaction. Apart from movement of sand grains, the change of dynamic stress can be real-time traced and recorded. The findings of this study provide a new route to research the macro-meso mechanism of sands dynamic compaction.

Key words: dynamic compaction, dry sands, particle flow code, dynamic stress, displacement field

CLC Number: 

  • TU 473
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