O CONTROLE TECNOLÓGICO DE UMA PEQUENA CONTENÇÃO EM SOLO GRAMPEADO NA CIDADE DE PORTO ALEGRE/RS

: The injections performed for stapled soils are of paramount importance for the functioning of the containment system. The technological control of a stapled soil work aims to test the capacity of these injections, not only through the normative criteria of cement grout resistance, but also in response to the interface with the soil when consolidated, by pullout test. This work aimed to evaluate the use of the stapled soil technique in a residual granite soil in a work located in the city of Porto Alegre / RS, using some technological controls, such as: RCS (Resistance to Simple Compression) of the grout staple injection cement and staple pullout test to check the adhesion tension (q s ) in prototype staple. For the verification of the RCS, more than 50 specimens of cement grout and some concrete from the construction site were molded in loco. The pullout test, on the other hand, was carried out at the construction site 28 days after the injection of the cement solution, whose specified water-cement factor was 0.5 for the CPII-32 cement. The pullout test result can be related to the direct shear test performed for the system anchoring soil. It was possible to make a map of the resistances of each injected clamp. From the clamp pullout test, it was possible to obtain and interpret the force-displacement relationship through loads and discharges with a monkey-pump-manometer set, observing that the value of q s must be interpreted as a function of the displacements obtained. Even with the curing of the specimens in the air, 85% of the samples tested ranged from 20 to 32 MPa, with 15% being around 19 MPa. The pullout test indicated that the value of q s adopted must be in the range of values between 180 and 245 kPa.