Laboratory Testing and Numerical Simulation of a Strip Footing on Geosynthetically Reinforced Loose Sand

Abstract

The objective of this paper is to study the bearing capacity and loading behavior of strip footings on geosynthetically reinforced loose sand. Laboratory loading tests were conducted on a rigid steel strip footing in a 0.9m x 0.9m x 1.0m sand box. Woven geotextile was used as reinforcement material. A finite difference program was used to simulate the load-settlement behavior of this footing. Two constitutive (Mohr-Coulomb and Double-Yield) models were utilized for the loose sand. Direct shear tests were performed to obtain the parameters needed for numerical simulation. The unreinforced ultimate bearing capacity obtained from this study ranges between theoretical values calculated by assuming general and local shear failure conditions. The bearing capacity predicted by these two soil models match with values obtained from sand box tests. However, the Double-Yield model outperforms the traditional Mohr-Coulomb model in simulating the loading behavior of this strip footing.

Planar geosynthetic-reinforced soil foundations: a review

“…Hussein and Meguid [79] Finite element ABAQUS 3D Square Geogrid Badakhshan and Noorzad [59] Finite element ABAQUS 3D Circular, Square Geotextile Lai and Yang [80] Finite difference FLAC 2D Strip Geotextile Nasr and Azzam [60] Finite element PLAXIS 2D Strip Geogrid, Geotextile Oliaei and Kouzegaran [19] Finite difference FLAC 3D Square Planar geosynthetic, Geocell Venkateswarlu et al [20] Finite difference FLAC 3D Square Geogrid, Geocell Gao and Meguid [23] Discrete element PFC 3D Square Geogrid Ouria and Mahmoudi [81] Finite element -Strip Geotextile Aria et al [82] Finite element PLAXIS 3D Strip Wraparound geotextile Zidan and Mohamed [17] Finite element PLAXIS 2D Strip Geogrid Wang et al [24] Discrete element PFC 2D Strip Geogrid…”

Coal and Rock Dynamic Disasters: Advances of Physical and Numerical Simulation in Monitoring, Early Warning, and Prevention - Volume II

“…Therefore, in this paper, the influence of different consolidation ratios K c on soil dynamic characteristics was mainly studied. On the basis of existing research, through dynamic triaxial test and discrete element simulation (DAI et al, 2013;KONG et al, 2013;SHEN et al, 2015;, the macro mechanical behavior and micro mechanical properties of saturated tailing silt were carefully studied according to the macro and micro results; moreover, the test of tailing silt was designed to discuss the influence of K c on the dynamic strength and dynamic pore pressure of soil samples, and made a reasonable explanation.…”

Evaluation of Bearing Capacity Increase for Woven Geotextile Reinforced Soils in Terms of Width of Footing

“…The load-settlement responses of the foundations on reinforced soil have been engaged attention for a long time by many researchers (Adams and Collin, 1997;Wayne et al, 1998;Michalowski, 2004;Patra et al, 2006;Ghazavi and Lavasan, 2008;Lavasan and Ghazavi, 2012;Ateş and Şadoğlu, 2014;Ateş and Şadoğlu, 2020;Kahraman et al, 2022). The improvement of the ultimate bearing capacity (Qu) of the footing on the reinforced soil is, as a rule, presented by using a non-dimensional parameter that is called as bearing capacity ratio (BCR) (Binquet and Lee, 1975;Guido et al, 1986;Omar et al, 1993;Patra et al, 2005;Lai and Yang, 2017;Saha Roy and Deb, 2017;Wang et al, 2018;Xu et al, 2018;Useche-Infante et al, 2019;Hussein et al, 2019).…”