Análise do comportamento de uma escavação provisória em solo grampeado

Abstract

This current work reports the geotechnical monitoring system of an approximately 30 m deep excavation work in a residual soil and basaltic rock located in Bento Gonçalves-RS. The execution of a provisional soil nailing wall and reinforcement of retaining wall with provisional tiebacks and metal profiles stand out among others techniques used. In order to follow possible movements, the geotechnical monitoring was based on the reading of inclinometers, surface landmarks and tell tales installed on the slopes. During the works, direct shear and pull out tests were carried out to measure geotechnical parameters. The executive method used and the geotechnical monitoring provided a continuous flow of work and monitoring. The instrumentation data will be used for comparison with the prediction of deformation using the Plaxis software which will simulate the mass behavior and evaluate the deformation through the finite element method followed by instrumented and modeled horizontal displacement data comparison over the time. The instrumentation provided reliable results and an efficiency of the instruments, moreover the software was able to achieve very significant results and close to reality in a long-term simulation, that has been presenting a good behavior in relation to the magnitude of the deformations and their distribution over the time.