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| FIELD ROLLER COMPACTION TEST AND DISCRETE ELEMENT ANALYSIS OF ROCKFILL DAM |
| LI Xiaozhu1，2，LIU Yang1，2，WU Shunchuan1，2 |
(1. Department of Civil Engineering，University of Science and Technology Beijing，Beijing 100083，China；
2. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine，University of Science and Technology Beijing，Beijing 100083，China) |
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Abstract According to the field roller rolling compaction(RC) test of Nuozhadu coarse rockfill zone of upstream and downstream I district rockfill engineering，a numerical procedure based on discrete element method(DEM) is proposed to study the RC test process. The particle movement，the variation mechanism of density and the compaction characteristics of the rockfill during the RC process are analyzed in detail，and the effects of different particle size distributions on the quality of dam filling are also discussed. The predicted results from the numerical simulation have a good agreement with the test data，which indicates that the proposed numerical procedure is feasible to the investigation of rockfill RC characteristics，and gives a novel explanation of the variation of macro-parameters such as dry density in the RC process from the microscopic point of views. The proposed numerical procedure also gives an effective method to select the scientific and reasonable RC construction parameters，for example，the Nuozhadu I distric RC engineering，and provides a new way for the research of rockfill characteristics.
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Received: 17 April 2012
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2013, Vol. 32 
