Analytical study of the post-closure behaviour of a deep tunnel in a porous creeping rock mass

作者：Deleruyelle, Frederic; Tuan Anh Bui^*; Wong, Henry; Dufour, Nathalie; Duc Kien Tran; Zhang, X. S.

来源：Comptes Rendus Mecanique, 2016, 344(9): 649-660.

DOI：10.1016/j.crme.2016.05.003

• Viscoplastic creep
• Hydromechanical coupling
• Analytical approach
• Deep tunnel
• Laplace transform
• Stehfest's inversion

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 nu = 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.

• 出版日期2016-9