Controle da compactação do subleito de valas em travessias de vias urbanas através do emprego do cone de penetração dinâmica

Abstract

The implantation of infrastructure networks has lead into a significate number of ditches openings on the urban roads. The lack of specifications and inspections in the backfill and restoration process of these ditches affect the structural and functional performance of pavements. Using traditional equipment and methods to compaction control of the backfill layers in ditches becomes less efficient due the space and time restriction to execute services. This research aimed to evaluate the viability to use the Dynamic Cone Penetrometer – DCP to the soil compaction control in the process of the backfill in ditches on urban roads. The DCP equipment has been used due to perform a non-destructive test, being of an easy and fast execution and low cost. The study has based in obtaining correlation between the soil penetration ratio – DN and the California Bearing Ratio – CBR, as well between the soil penetration ratio and the soil compaction rate – GC, according the methodology proposed by Garcez (2010). For that, it was made an experimental ditch in the dependencies of the University Technological Federal of Parana, Pato Branco Campus – PR, from where it was collected the samples to perform the laboratory test of soil characterization, also where it was performed in situ tests. The results presented that the correlations obtained between CBR and DN and DN and GC were considered satisfactory and that the equipment DCP is viable to the compaction control, once it is used assuring the same conditions to humidity and compaction energy to each soil type.