Experimental Study on High Rockfill Embankment Filling Quality Controlled by Rolling-Dynamic Compaction Technology

Abstract

This paper proposes a case study using rolling-dynamic compaction technology to control the filling quality of high rockfill embankment for Pan-Xing highway in Guizhou Province, China. Firstly, the rolling compaction quality evaluation system of large particle size rockfill embankment was reviewed, which includes the evaluation index, the evaluation standard and the evaluation method. Based on the filling quality evaluation system, the rolling compaction construction parameters of layered filling were obtained. Secondly, the construction parameters of dynamic compaction were obtained through the field experiments. Based on field measurements and theoretical model calculation, the improvement depth, the filler density and the porosity change amplitude in the improvement depth range after dynamic compaction were presented for evaluating the dynamic compaction effect of rockfill embankment. Finally, according to the results of rolling compaction and dynamic compaction experiments, the rolling-dynamic compaction technics were summarized. These can be used in guiding the high rockfill embankment filling construction, ensuring the filling quality and construction schedule. Limited studies indicate that rolling-dynamic compaction is an effective and economic technique to control the filling quality of high rockfill embankment. Furthermore, the rolling-dynamic compaction technics provide a valuable reference to similar engineering construction.