Análise comparativa do dimensionamento de cortina atirantada aplicada em casos de taludes com solos diferentes

Abstract

Containment structures are used to stabilize slopes. The curtain is an example of a technique of containment that is widely used in the world, for the practicality, security and speed of execution. The method consists of inserting tie rods in the soil mass and the anchorage is verified by the interaction at the soil-bulb interface, which increases the normal and effective forces of the mass, the stability coefficient and the shear strength of the soil, making the structure active to withstand the slope. This work reflects on the dimensioning of the curtain containment technique applied to slopes with the same geometric characteristics, however, constituted by different soils. In the first situation, the structure was designed for soil of clayey sand, and in the second situation the structure was dimensioned for a slope composed of sand. The slope presents height of 7 meters, length of 14 meters, and slope of 84.29º, while the massif has parameters different from the ground, which resulted in different behaviors when submitted to the technique of containment. The slope presents height of 7 meters, length of 14 meters, and slope of 84.29º, while the massif has parameters different from the ground, which resulted in different behaviors when submitted to the technique of containment. Thus, because the sandy soil only contained frictional forces, it required a greater anchoring force to resist the efforts and to guarantee the stability when compared to the clay sand soil. In addition, the curtain anchored in sandy soil had a higher work cost than clay sand due to the higher amount of steel used.