Design and Construction of Tunnels in Jointed Rock according to the AJRM Method - Part 1

摘要

For a safe and economical design of structures in jointed rock, a realistic consideration of the interaction between rock mass and structure is required. This requirement is neither fulfilled by the subgrade reaction method nor by classification systems (Q, RMR, RMi). Also the procedure on the basis of the GSI and the Hoek-Brown failure criterion, introduced by Hoek-Brown, in many cases is not adequate, since it assumes isotropic rock mass behavior. The AJRM-Method however, which is explained in the given article by means of examples, allows for a realistic description of the jointed rock mass behavior under consideration of the frequently prevailing anisotropy, and thus enables for a safe and economic design. The AJRM-Method can also be applied to groundwater modelling. This as well as the determination of the required parameters will be outlined in the second part of the given article.