Analysis of static and dynamic stability of slopes armed with geotextiles (Case study: Maragheh Alavian earth-dam)

Document Type : Case Study

Authors

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

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

3 Department of Civil Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran

10.30495/geotech.2021.688312

Abstract

Dams are one of the most important structures for storing water in today's society due to their use in industry. The structural failure of the dam containing water, in addition to economic losses, also causes irreparable damage. This increased the importance of dam design and retrofitting. The stability of earthen dams mainly depends on the shear strength of the soil and this shear strength in earthen dams is provided by the action of friction between grains. The greater the angle of internal friction between the soil grains, the more shear stress is tolerated by the soil, and the stability of the dam increases. Synthetic materials called geotextiles that have properties such as granular materials (soil) in terms of mechanical and chemical resistance are high. The use of polymer elements in dams mainly causes more stability and stabilization of embankments. In this study, the impact of geotextiles on the Alavian earth dam in Maragheh has been investigated. For this purpose, by modeling the earthen dam with the help of various softwares, the effect of the type of characteristics of geotextile materials the height of the dam, and the location and distance between each other have been analyzed and studied. In particular, the installation of geotextiles is very efficient in static analysis and has caused the effective stress created in the dam to be zero, which is very rare. In dynamic analysis, the installation of geotextiles has reduced by 34% the most effective stress created in the dam.

Keywords