The back-to-back reinforced earth wall with a rigid panel-facing (RRR-B) is designed and constructed at and behind the bridge support, at the raised tunnel portals, to elevate the railway line within a limited right-of-way. The stable operation of the high-speed railway track depends on the competence of the supporting earth structure and subgrade. This article presents the study outcomes on overall stability (factor of safety), tension load within the wall to wall connecting reinforcement, horizontal deformation of the facing wall, and vertical deformation at the top of the fill by decreasing the vertical spacing between wall-to-wall connecting reinforcements under both single-line and double-line railway loading cases. For this study, a back-to-back RRR-B wall was analyzed using finite element analysis (FEA)-based software and validated against published journal paper. Total, four model analysis with short-length earth reinforcements (i.e., 35% of H) and wall-to-wall connecting reinforcements were adopted to examine the effect of decreasing the vertical spacing (S) between wall-to-wall connecting earth reinforcements (i.e., 2.0, 1.6, 1.2, and 0.8 m). The findings indicate that increasing the number of wall-to-wall connections improves stability (factor of safety), reduces maximum tension load within wall-to-wall connecting reinforcements, and improves both the vertical deformation at the top of the backfill and the horizontal deformation of the facing wall.