Slope protection. Shallow trenches. Excavation bracing. Soil nailing. Deep cuts. Tieback systems. Secant pile wall design. Soldier beam and lagging. Anchored sheet pile wall. Soldier pile - Tremie concrete. Cement-bentonite pre-trenching. Stone or sand columns. Slurry trench method. Caissons design and construction. Tremie pipe. Tunneling methods (cut and cover method-shield method or tunnel boring machines-pipe jacking and micro tunneling).