Variation of soil density and earth pressure due to strip compaction

Yung-Show Fang*, Y. L. Chien

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper studies the variation of soil density and earth pressure in a soil mass due to the vibratory compaction along a strip on the surface of the cohesionless backfill. Experiments were conducted in a non-yielding model retaining wall facility and dry Ottawa sand was used as fill material. Based on the test results, it is found that surface settlement increased with the increasing number of passage of the compactor. The relationship between the surface settlement and the number of passes could be properly described by the hyperbolic model. The contours of Δσ v after the first passage of the compactor were analogous to a series of concentric circles. As the number of passes increased to 8, the depth of the compaction-induced zone increased with increasing energy input. After the first passage of the compactor, the contours of Δσ h formed two regions of stress concentration below the surface. As the number of passage increased to 8, the two high-stress regions merged. The mechanism of soils after the first passage of the compactor could be properly explained by local-shear bearing capacity failure mode. The mechanism of soils after 8 passes of the compactor could be simulated by a single pile driven into a cohesionless soil.

Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering
Subtitle of host publicationThe Academia and Practice of Geotechnical Engineering
Pages700-703
Number of pages4
DOIs
StatePublished - 1 Dec 2009
Event17th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2009 - Alexandria, Egypt
Duration: 5 Oct 20099 Oct 2009

Publication series

NameProceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering
Volume1

Conference

Conference17th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2009
CountryEgypt
CityAlexandria
Period5/10/099/10/09

Keywords

  • Compaction
  • Earth pressure
  • Model test
  • Relative density
  • Sand
  • Settlement

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