LIMA, A. N.; http://lattes.cnpq.br/6334162876759362; LIMA, Alisson do Nascimento.
Resumen:
The need to reserve water for multiple uses, using earth dams, is common practice in Brazil.
Containment of water by the Embankment must reduce water outlets by the downstream slope,
in order to guarantee the dammed volume and the work’s safety. Thus, the present research
analyzed the influence the insertion of a nucleus, with improved soil, in the water’s amount
percolated through the mass of a zoned earth dam. A flow analysis was performed using
SEEP/W (finite element based software) for a composite of 75% Botucatu sandstone residual
soil and 25% dry weight basalt crushing residue of 16.0, 17.2 and 18.5 kN/m³. It has a
trapezoidal nucleus with a base smaller than 8 meters and the largest base variable: 20, 45 and
70 meters and with the following mass-specific weight variables, with lime’s additions of 5, 7
and 9%. With the leakage results for each simulation, the applied calibration content has no
direct influence on the percolation reduction, but the apparent dry weight in the paper nucleus
in this phenomenon. With an analysis of the porosity/lime ratio (/Liv
0,12), the use of the higher
the porosity of the material, the greater the percolation and the lower the effect of the cementing
agent on the nucleus A unique curve related to /Liv
0,12percolated leakage can be adjusted for
each nucleus size. Thus the applicability of the /Liv coefficient proves to be efficient in
optimizing the core with regard to the optimization of the shaped core, cementitious material
content and material porosity, all as a function of the maximum percolation flow rate adopted.
