Ensaio de Inderbitzen modificado em solos com adição de fibras naturais e lodo de tratamento de esgotos sanitários

Abstract

Soil erosion is a natural factor that has been accelerated by human behavior over the environment. Caused by a range of agents, erosion is responsible for the loss of tons of soil material every year, silting water bodies, raising flooding chances, and reducing soil fertility. Erodibility can be described as the tendency of soil particles to detach and be carried away by erosive agents. Among existing methodologies that assess erodibility, one can highlight the Inderbitzen ramp methodology. Soils modified by addition of materials are characterized by the insertion of elements that better distribute the tensions amongst the soil massif and beyond the slip interface. In this context, this study evaluates the capacity of a modified Inderbitzen methodology with the addition of a rain simulator to assess the erodibility of pure soil and soil modified with sugarcane fibers and sewage treatment sludge. Both materials were chosen based on their ability to change soil properties. This study also proposes a new test methodology based on the modifications applied on the original Inderbitzen ramp, presenting the new test procedures at the end of the document. This study concluded that the methodology could reproduce surface runoff up to a point, with limitations about the ramp inclination. The modified soil with natural fibers was not capable to improve soil resistance to erosion, consequently increasing the quantity of soil carried by the water flux.