Abstract :
[en] The deferred behaviour of underground cavities is often encountered in geotechnical engineering. This paper presents an analytical approach for the post-closure behaviour of a deep tunnel inside a rock mass considering both creep and hydromechanical couplings. Creep, supposed slower than hydraulic flow, is described by a linear Norton–Hoff law in the particular case of an elastically incompressible rock mass (i.e. Poisson’s ratio ν = 0.5). The resolution uses Laplace transform and Stehfest’s algorithm. Numerical examples are carried out to enlighten the hydromechanical responses around the tunnel and to show the consistency of the solution.
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