Análise estatística dos fatores que influenciam na resistência ao arrancamento em muros de solo reforçado com geossintéticos

Abstract

Reinforced soil walls play a fundamental role in the stability of land and the safety of civil works, especially in regions with soft soils or uneven terrain. The use of geosynthetics, such as geotextiles and geogrids, in the construction of these walls offers an advantageous combination of structural efficiency and economy, by allowing the use of local materials and simplifying the construction process. However, limited understanding of the interaction between different types of soils and geosynthetics under real conditions can compromise the accuracy of designs and increase costs. In this scenario, pullout tests become one of the alternatives to evaluate the resistance of the interface between soil and reinforcement, ensuring greater safety and effectiveness in the solutions adopted. This study aimed to identify the main factors that influence the maximum pullout force at the soil-geosynthetic interface. For this purpose, a database composed of secondary information from national and international studies that addressed pullout tests in various geotechnical contexts was used. Statistical analysis of these data was performed with the aid of JAMOVI software, allowing the identification and quantification of the most relevant variables for the performance of the maximum pullout force. The results showed that the maximum pullout force in systems with geosynthetics is influenced by different factors, being negatively impacted (reducing the maximum pullout force) by variables such as the D50 diameter and dry density, which can hinder the efficient interaction between soil and reinforcement. On the other hand, factors such as D10, internal friction angle, cohesion, tensile strength and elongation of the geosynthetic, applied overload and thickness of the geosynthetic exert a positive influence (increasing the maximum pullout force), favoring the efficiency of the system. These findings reinforce the need for careful selection of both soil properties and the type of geosynthetic, aiming to maximize pullout resistance and ensure the effectiveness and safety of geotechnical projects.