Arabian Journal for Science and Engineering

, Volume 39, Issue 2, pp 685–694 | Cite as

Monotonic Preloading Effect on the Liquefaction Resistance of Chlef Silty Sand: a Laboratory Study

Research Article - Civil Engineering

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).

Keywords

Chlef silty Sand Triaxial test Monotonic loading Cyclic loading Preloading Contraction Dilatancy 

List of Symbols

Gs

Specific gravity of the sand

Gf

Specific gravity of the fines

FC

Fines content (%)

D10

Effective grain diameter

D50

Mean grain size of host sand

Cu

Coefficient of uniformity

emax

Maximum void ratio

emin

Minimum void ratio

Ip

Plasticity index (%)

Dr

Post consolidation relative density (%)

eo

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

Nc

Number of cycles

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Copyright information

© King Fahd University of Petroleum and Minerals 2013

Authors and Affiliations

  1. 1.Laboratory of Materials Sciences and Environment, Civil Engineering DepartmentHassiba Ben Bouali UniversityChlefAlgeria
  2. 2.Laboratory of Civil Engineering and Geo-Environment (LGCgE)University of Lille 1Villeneuve d’AscqFrance

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