Monitoramento de poropressões construtivas

Penna, Lorena Romã; Filho, Waldyr Lopes de Oliveira

doi:10.1590/s0370-44672012000400003

Cited by 1 publication

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“…This research does not examine that aspect, but it endorses the previously mentioned idea that the static liquefaction condition may be achieved simply by bringing the material into a non-stable state (high pore pressure for example) in which its resistive force is reduced sufficiently to allow static conditions to produce static liquefaction. Such type of pre-triggering mechanism can be caused by, e.g., continuous vibrations generated by traffic equipment in the mining area setting (Penna and Oliveira-Filho, 2012).…”

Section: Further Discussionmentioning

confidence: 99%

Impact of methods used to reconstitute tailings specimens on the liquefaction potential assessment of tailings dams

Corrêa

Filho

2019

REM, Int. Eng. J.

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The aim of this research is to investigate the liquefaction susceptibility of silt sandy mining tailings by experimental laboratory techniques. The main aspect analyzed is how techniques of sample reconstitution impact the results obtained in static undrained triaxial tests. Different methods of sample preparation are reviewed, such as moist tamping (MT), air and water pluviation, and a newly developed one called the Slurry Deposition (SD) method. This research highlights the importance of the "fabric" or particle structural arrangement associated with the various specimen preparation techniques when liquefaction potential assessment is of concern. Two series of undrained static triaxial tests were performed on specimens prepared according to MT and with SD techniques on specimens in the loose and very loose state. Results have demonstrated that MT specimens have shown the whole spectrum of liquefaction resistance (total liquefaction, limited liquefaction, and no liquefaction) on increasing density, while the SD campaign has shown only liquefaction resistance even in the overlapping intermediate densities with the MT series, where the latter has shown liquefaction, although limited. This scientific study critically discusses the risk of taking laboratory results of replicated soil elements that may not correspond to the reality.

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Section: Further Discussionmentioning

confidence: 99%