AVALIAÇÃO DA RESISTÊNCIA AO ARRANCAMENTO EM SOLO GRAMPEADO ATRAVÉS DE FASES DE INJEÇÃO

Evaluation of resistance pullout tests to soil mailing through injection phases

Abstract

ABSTRACT: The technique of stabilization of slopes by means of stapled soil, has become in the geotechnical environment synonymous with financial contribution through the injection of phases, generalizing this type of methodology for all stratigraphies of soils, increasing the value of the works executed in slopes due to the collection of the volume of injected cement, distancing from its original methodology through the rapid containment in soil masses. The scope of the research is to present the parameters of shear strength of the soil-clamp interface (qs), performed from pullout and creep tests on three anchor bolts with different injection phases and cement mix consumption, in an infrastructure work located in São Paulo. The results allowed to quantify that the injection through the annular filling between the rod and the sheath (sheath) is fundamental for its fixation, mobilizing small displacements with respect to the maximum test load, demonstrating that soil-structure adhesion can be compromised by the number of stamped tubes . Verifying that ring fill is fundamental in the adhesion of the anchors and in the treatment to reduce the infiltrations through the geological features of low permeabilities, when executed in cohesive soils. Analyzing that for each type of soil and work to be executed there is an adhesion and limit of injection compatible with the mechanical resistance of the ground that the anchor will be anchored.