Cone de penetração dinâmica (DCP): uma alternativa ao dimensionamento de pavimentos urbanos.

Abstract

For design and the evaluations of pavements of urban roads, in order to obtain a minimum level of usefulness, there are no methods that approach inherent specific factors of their realities. In the case of roads wiht a low volume of traffic, a order design of the structure of the pavement happens when it conventional methods are used. Associated to this, the structure of the pavements in the peripheries of Brazilian cities, mainly in the Northeast, is placed upon a layer of paving stones, a coating, which results in an unnecessary total thickness. The development of the Dynamic Cone Penetrometer (DCP) was an answer to the need of a simple and fast device for the characterization and evaluation of the support capacity of soils. The structure of DCP makes it an alternative and attractive tool, compared with the tests of high cost and laborious execution, which are used conventionally. This thesis presents the results of an investigation about the possibility of usiong DCP in the design of pavements on urban roads. As a working method, it was, starting from regression analysis, a correlation among the values of the Penetration Index (DN), obtained with the DCP test, and the values of CBR of the subgrade. In addition to this, preliminary studies that subsidize the suggestion of an empiric, preliminary process, for the design of the flexible pavements of urban roads, with low volume of traffic, as well as, of the pavements whose coating is made of paving stones. It can be said that:" the DCP is a relatively rehearsal fast, versatile and indeed economical when compared to the other rehearsals conventionally used for the same purpose