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DEM Analysis of the Effect of Grain Size Distribution on Vibroflotation Without Backfill

Conference paper

Abstract

Vibroflotation without backfill is a widely-employed ground improvement technique in geotechnical engineering, which has been proven to be a quite effective method for granular sands. However, some mechanics still remain unclear, such as the effect of the grain size distribution (GSD) of the ground. Hence, firstly, two numerical grounds were generated using the Distinct Element Method (DEM), which only differed in the GSD while other parameters were the same. Then, the vibroflotation without backfill was simulated in the two numerical grounds. Finally, the effect of the GSD on vibroflotation without backfill was studied by comparing the relative change of void ratio during vibroflotation and presenting the micro information, i.e., particle velocity field. The results show that a more efficient densification, a better treatment and a larger affected area can be achieved by the vibroflotation without backfill in the test ground with bigger uniformity coefficient.

Keywords

Vibroflotation without backfill Distinct Element Method Grain size distribution 

Notes

Acknowledgement

The research was financially supported by the National Natural Science Foundation of China with Grant Nos. 51639008 and 51579178, which are sincerely appreciated.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Disaster Reduction in Civil EngineeringTongji UniversityShanghaiChina
  2. 2.Department of Geotechnical EngineeringTongji UniversityShanghaiChina
  3. 3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghaiChina

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