This search aims to evaluate the corrosivity of AISI 1020 steel in clayey soil through microbiological analyzes and mass loss technique. Through results obtained, according identification methodology Bergey manual, presence two microorganisms was verified, Acidithiobacillus thiooxidans ferrooxidans , responsible for biocorrosion process addition filamentous fungi. The these bacteria does not ge...

Acoustic imagery generated by the Naval Research Laboratory's ASCS (Acoustic Sediment Classification System) is analyzed using tunefrequency methods. The ASCS imagery is generated using normal-incidence acoustic data, Nonlinearities in the propagating medium produce multiple harmonics in the return. Different components of the bottom and sub-bottom produce different spectral signatures, based o...

This paper presents an experimental and numerical analysis of the uplift resistance pipelines buried in reinforced soil. The behavior system is studied using a set laboratory experiments. pull-out forces some reinforcing are most important factors affecting resistance. Buried elements such as that have high pressure fluids or under temperature need to be order increase their One efficient metho...

Acoustic techniques have been used for many years to find and locate leaks in buried water distribution systems. Hydrophones and accelerometers are typically used as sensors. Although geophones could be used as well, they are not generally used for leak detection. A simple acoustic model of the pipe and the sensors has been proposed previously by some of the authors of this paper, and their mod...