Análise numérica 3D do túnel auxiliar a jusante da UHE simplício-anta
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Data
2011-08-29
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Universidade Federal de Goiás
Resumo
With the accelerated occupation of the space, the use of tunnels play an important role in
engineering, in this sense, the deformations control during it s construction process is very
important for the best performance of tunnels. In this sense the numerical analyzes represent a
likely economy in the design process. This paper uses a theory of elasticity in the FlexPDE,
the same allows the solution of a system of partial differential equations using the finite
elements method and producing a graphical output of the problem. In this sense simulations
were performed using three-dimensional numerical deep tunnel under the elastic rock in a
physical environment continuously, equivalent to the rock mass. Analyzes were made of
three-dimensional numerical condition and constructive process of a circular tunnel deep in
the rock. These results were compared with the elastic solution of Kirsch for a cross section
corresponding to the plane strain state, showing good concordance of numerical results with
the analytical. After the verification stage of the numeric model has also been given to the
numerical simulation 3D and analyses based on monitoring data from the tunnel auxiliary of
the Hydroelectric Power Plant (HPP) of Simplicio/Anta, located in Paraiba do Sul River, in
the state of Rio de January - RJ. In this work were carried out measurements of convergence
in various sections of the tunnel at the same time of excavation progress. These results and the
parameters of characterisation, strength and deformation were colected from Vissoto Junior
(2009). Finally the results of the analyzes numerical 3D were compared with the results of
field, and after the adjustment of geotechnical parameters in back analyses was obtained a
good concordance of numerical results with field data. In this case studied the excavation of
the tunnel had a linear elastic behavior since the rock mass is of good quality and the tunnel
relatively small.
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MORAES NETO, Floriano Rodrigues de. 3D Numerical analysis of the tunnel downstream of the auxiliary. 2011. 123 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2011.