Effect of Geogrid on Increasing the Bearing Capacity of Strip Foundations in Sandy Soils

Document Type : Original Research

Authors

1 ِDepartment of Civil Engineering, Faculty of Engineering, Shabestar Branch, Islamic Azad University, Shabestar, Iran

2 Department of Civil Engineering, Julfa Branch, Islamic Azad University, Julfa, Iran

3 Department of Civil Engineering, Tasuj Branch, Islamic Azad University, Shabestar, Iran

4 Department of Civil Engineering, Mohaghegh Ardabili University, Ardabil, Iran

10.30495/geotech.2021.688913

Abstract

One of the geosynthetics that is used in different parts of the world under surface foundations is geotextile, and relatively valid texts are available on how to use it and increase its load. But other geosynthetics have been geogrids, which have increased the load-bearing capacity of surface foundations in soft clay and silty loam soils. In this paper, our u/b variations are between 1 and 17.5 with step 205 and in three different b/B modes are 5, 10 and 15. Also, the b/B changes from 0.1 to 2 with a step of 0.25 and in three different u/B modes are equal to 0.25, 0.75 and 1. The purpose of this study is to compare the soil load in different cases of geogrid with non-geogrid. This comparison is also performed by the BCR dimensionless number, which is the result of dividing the armed soil load into the soil load without geogrid. The results of this paper showed that the presence of geogrid increases soil fertility, but from a certain extent onwards, this amount of fertility does not show much difference. In this ratio, the geogrid dimensions are equal to 17.5 times the dimensions of the foundation. The presence of geogrids increased the soil fertility, but from a distance onwards, this amount of fertility does not show much difference. This ratio is equal to 1.75 times the dimensions of the foundation.

Keywords