Arm or stem Surcharge Figure 1: Retaining Wall. key Page 1 of 28 Backfill Terms related to Retaining Walls: Prof Dr. Qaisar Ali (http://www.eec.edu.pk) Department of Civil Engineering, N-W.F.P UET, Peshawar Design of Retaining Walls Prof Dr. Qaisar Ali (http://www.eec.edu.pk) Continuous back drain, crushed stone Department of Civil Engineering, N-W.F.P UET, Peshawar Design of Retaining Walls Arm Weep Holes GL GL GL Section A-A Crushed stone Base Slab Counterfort key Backfill Tile drain Tile drain δ