ABSTRACT
To investigate the effect of tunnel existence on the ramp stability, two models have been simulated. The case study is a part of Arash tunnel project constructed in Tehran, Iran. The first model contains construction of tunnel, conduit, and ramp, respectively, while in the second model (without tunnel) after conduit implementation, ramp is constructed. This article is aimed to discuss the displacements induced in ramp walls, and ground settlements due to existence of the adjacent tunnel, and supporting elements in two numerical cases. Numerical results demonstrate that the displacement of ramp walls, and ground settlements have increased in the tunnel existed model. Also the location of maximum displacement of ramp walls and ground surface are different in two cases. Eventually the settlement results of the actual constructed model (first model) has been compared to monitoring results.
