Abstract:
Brazil is covered by a vast area of lateritic soils. The technique of DMM (Deep Mixing Method)
columns were sought to be applied as an environmental and economically feasible solution in lateritic
soils, a method already consolidated in countries such as the United States, Japan, Sweden and
Belgium by applying soft or organic soils. However, temperate soils have very different characteristics
from tropical soils. Using the wet method, fourteen columns were executed in this research, called
DMM piles, with 60 cm in diameter and 3.5 m deep, by the wet method. The dimensions were limited
to the characteristics of the equipment. Results are reported for three tests of fast static load carried out
on piles E11 and E13, both made with the addition of 120 kg / m³ of cement. E11 was performed with
2 mixing cycles and E13 with only one mixing cycle. Adopting the 5 mm displacement criterion, the
loads supported were 204 kN after 75 days and 217 kN after 16 months of execution. The E13 in the
same condition withstood 163 kN after 75 days. This is considered a significant preliminary result.
Differently columns implemented in temperate soils, it is possible to analyze the DMM pile as a
structural element.