3D Numerical Modeling of Rigid Inclusion-Improved Soft Soils Under Monotonic and Cyclic Loading—Case of a Small-Scale Laboratory Experiment
Open Access
- 4 February 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (4), 1426
- https://doi.org/10.3390/app11041426
Abstract
This paper is based on small-scale laboratory tests (1:10) of a rigid inclusion-improved soil under normal gravity. A low area improvement ratio (2.4%) under monotonic and cyclic loading was used. 3D numerical calculations are performed to model these tests. The proposed numerical modeling is performed by the finite element method (FEM) using the ABAQUS software. A representative elementary volume model is suggested for reducing the calculation time. A hypoplastic constitutive model (HYP model) is applied for the load transfer platform (LTP). A total of three geometrical configuration cases of the experimental tests are numerically considered including a rigid slab over a mattress of 100 mm on the reinforced soil, a mattress of 100 mm on the reinforced soil, and a rigid slab over a mattress of 50 mm on the reinforced soil. The proposed numerical results are compared to the experimental data and the previous numerical results of Houda. The cyclic response of the systems is shown in terms of soil arching and settlements. The decrease in pile efficacy and the cumulative settlements are exhibited. The HYP model allows to better simulate the soil arching mechanisms inside the LTP than the CYsoil model used in the Houda’s research work. A good concordance between the proposed numerical results and the experimental data was obtained.This publication has 21 references indexed in Scilit:
- 3D Numerical Modeling of a Piled Embankment under Cyclic LoadingInternational Journal of Geomechanics, 2019
- Rigid pile improvement under vertical cyclic loading: 1g laboratory small-scale modellingInternational Journal of Physical Modelling in Geotechnics, 2019
- Soft soil improvement by rigid inclusions under vertical cyclic loading: numerical back analysisEuropean Journal of Environmental and Civil Engineering, 2018
- Estimation of Dynamic Impedance of the Soil–Pile–Slab and Soil–Pile–Mattress–Slab SystemsInternational Journal of Structural Stability and Dynamics, 2017
- Dynamic Response of Pile Reinforced Soils and Piled FoundationsGeotechnical and Geological Engineering, 2016
- Soil Arching in a Piled Embankment under Dynamic LoadInternational Journal of Geomechanics, 2015
- Three-dimensional finite element analysis of arching in a piled embankment under traffic loadingArabian Journal of Geosciences, 2015
- Physical evidence of the effect of vertical cyclic loading on soil improvement by rigid piles: a small-scale laboratory experiment using Digital Image CorrelationActa Geotechnica, 2014
- The soilmodels.info projectInternational Journal for Numerical and Analytical Methods in Geomechanics, 2007
- Hypoplastic model for cohesionless soils with elastic strain rangeMechanics of Cohesive-frictional Materials, 1997