Numerical Simulation to Select Proper Strain Rates during CRS Consolidation Test

  • Abderrahmane Henniche Polytechnic National School of Algiers
  • Smain Belkacemi Polytechnic National School of Algiers

Abstract

Constant rate of strain (CRS) and incremental loading (IL) consolidation tests are extensively used to measure consolidation properties of clayey soils. However, results of CRS test are usually strain rate dependent. In this study, a finite differences simulation of CRS test based on Terzaghi’s theory of consolidation is performed. The numerical simulation permits to evaluate a strain rates range satisfying a preset relative pressure criterion. Results of simulation show that the required relative pressure criterion can be verified, during the steady state stage of CRS test, only for particular types of soils and particular range of strain rates. Subsequently, a simple method is proposed to select, for a soil sample defined by its initial height, initial void ratio and liquid limit, an appropriate strain rates range satisfying the ASTM 4186-06 criterion. Comparison of previsions and experimental results reported in literature shows good agreement.

Keywords: consolidation, CRS test, criteria, strain rate, liquid limit
Published online
2017-12-14
How to Cite
Henniche, A., & Belkacemi, S. (2018). Numerical Simulation to Select Proper Strain Rates during CRS Consolidation Test. Periodica Polytechnica Civil Engineering, 62(2), 404-412. https://doi.org/10.3311/PPci.9650
Section
Research Article