The effect of using geogrid capsules on the bearing capacity of strip foundations in sandy soils

Document Type : Research Article

Authors

Department of Civil Engineering, Faculty of Engineering, Hamedan Branch, Islamic Azad University, Hamedan, Iran

Abstract

Soil is a material that has good resistance to pressure and shear, but is weak against tension. In order to overcome tensile weakness, advanced methods and more resistant materials such as geosynthetics are used, some of which are used in soil reinforcement such as geogrids. In this study, the effect of geogrid capsule on the bearing capacity of strip foundation located on sandy soil under settlement has been investigated using PLAXIS 2D finite element software. For this purpose, after validating the numerical model, the effect of parameters such as length, thickness of the capsule, number of layers and the distance of the capsules from under the foundation and from each other on the final bearing capacity of the strip foundation has been studied. The results of the analyzes are drawn in the form of dimensionless diagrams, and based on that, the optimal placement depth, optimal thickness and number of capsular reinforcement layers have been determined. The analysis results show that, by adding the number of capsule layers, the bearing capacity of strip foundation increases significantly. that the maximum bearing capacity of the foundation is obtained by placing the capsules in a depth ratio of 0.1. And finally, with the increase in the length and number of layers of the capsule, the bearing capacity increases and the settlement decreases, which is caused by preventing the development of the rupture surface of the soil under the capsule, as a result, the optimal length and thickness values of the capsule have been extracted.

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Amirkabir Journal of Civil Engineering
Volume 57, Issue 2
2025
Pages 341-362

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