Aplicação do cone de penetração dinâmica (CPD) como alternativa para fundações rasas.

Abstract

Foundations are normally divided into two types: deep and shalow foundations. Deep foundations are those settled in a depth greater than two times its minor dimension and at least 3m deep. On the other hand, shalow foundations are caracterized by transmiting its load to the field by pressure distributed over its base. In civil engineering construction, in order to estimate the soils bearing capacity, it is used the standard penetration test (SPT), however, this test shows some limitations regarding the transportation of equipment and cost. The dynamic cone penetration test (DCP) is used in pavement and roads in order to estimate the sublayer bearing capacity. The objective of this dissertation was to verify the possibility of using the DCP tests results in design of shalow foundations, with small equipment modifications, by means of statistical correlations between data obtained by SPT and DCP tests. The modifications made in the DCP equipment were made to reach 3m depth keeping its portable caracteristics. Also, correlations between DCP and angle of internal friction of the soils and DCP and in situ soils density were done. Significant correlations were obtained between DCP tests results and SPT tests results with R2 ranging from 0.81 to 0.93 for DCP tests with and without hole, respectively. These correlations showed the viability of using DCP equipment in design of shalow foundations with considerable costs reduction in the design of small construction due to its better velocity and better estimate of solis bearing capacity.