TITLE:
Unified Approach to Assess Engineering Performance of Fill Improved by Shallow to Deep Compaction Based Techniques Using Relative Density
AUTHORS:
Ahmed Alaaeldin, Emmanouil Spyropoulos, Anas Orabi
KEYWORDS:
Compaction, Relative Density, Performance Specifications
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.10 No.3,
August
27,
2020
ABSTRACT: The setting of pre assessment criteria for soil compaction is hardly
determined, especially, in case of undecided structure locations. Different
design guidelines recommend achieving a specific value of relative density for
the compaction of fill placement works. Alternatives were discussed through the
literature to predict the value of relative density based on soil field tests (e.g.
cone and standard penetration tests). This paper presents the weakness of using
the Over Consolidation Ratio (OCR) as guidance to assess the value of cone tip
resistance using the soil relative density. The variation of OCR (from 1 to 10)
has a significant effect on the qc value up to 110% when compared to the normally consolidated state. Then
normally consolidated state can logically cover the compaction process with
variation of 20%, 33%, and 4% for relative density values 85%, 70%, and 60%,
respectively. A unified approach is recommended to predict the compaction qc-performance line using
normally consolidated condition and sand relative density.