Abstract
This paper presents a laboratory study on the influence of monotonic preloading on the liquefaction resistance of Chlef soil using the triaxial apparatus. The study is carried out via a multiple drained monotonic and undrained cyclic tests. The samples were subjected to a static drained loading until an axial strain of 2.25 % (contraction phase), 4.5 % (end of contraction phase) and 9 % (dilatancy phase). For each preloading, cyclic tests have been conducted with different loading amplitudes. The obtained results are highly dependent on preloading amplitude: the liquefaction resistance increases with the application of a preloading during the contraction phase with an axial strain \({\varepsilon _{1} =}\) 2.25 % , decreases when the preloading increases to \({\varepsilon _{1}= 4.5}\) % and reaches a lower resistance than the intact soil when \({\varepsilon _{1 }= 9}\) % (dilatancy phase).
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Abbreviations
- G s :
-
Specific gravity of the sand
- G f :
-
Specific gravity of the fines
- F C :
-
Fines content (%)
- D 10 :
-
Effective grain diameter
- D 50 :
-
Mean grain size of host sand
- C u :
-
Coefficient of uniformity
- e max :
-
Maximum void ratio
- e min :
-
Minimum void ratio
- I p :
-
Plasticity index (%)
- D r :
-
Post consolidation relative density (%)
- e o :
-
Index void ratio
- LL:
-
Liquid limit
- PL:
-
Plastic limit
- u:
-
Pore pressure (kPa)
- \({\sigma'_{\rm c}}\) :
-
Initial confining pressure
- B :
-
Skempton’s pore pressure parameter
- Δu :
-
Excess pore water pressure (kPa)
- Ru:
-
Excess pore pressure ratio
- CSR:
-
Cyclic stress ratio \({(q_{\rm m}/2*\sigma_{c}^{\prime})}\)
- CRR:
-
Cyclic resistance ratio
- N c :
-
Number of cycles
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Arab, A., Sadek, M., Belkhatir, M. et al. Monotonic Preloading Effect on the Liquefaction Resistance of Chlef Silty Sand: a Laboratory Study. Arab J Sci Eng 39, 685–694 (2014). https://doi.org/10.1007/s13369-013-0700-4
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DOI: https://doi.org/10.1007/s13369-013-0700-4