SLURRY MICROTUNNELING (MTBM) Microtunneling systems are the optimal choice for smaller diameter, unmanned tunnel boring projects. With these systems, the tunnel boring machine (MTBM) is driven and monitored remotely from the surface and is capable of single pass installations on line and grade per industry standards. The surface-located operation room houses the operator station and drive motor controls for the MTBM and its slurry pumps. Hydraulic power units for the main and intermediate jacking stations are housed separate to the operation room. Robbins has a full staff of field service and support personnel to train and assist as needed to ensure successful project completion. MTBM APPLICATIONS • Soft ground, mixed face and rock tunneling projects • Operates below the water table up to 3 bar pressure • Machines built to suit DIN Standards as well as common U.S. Standards • Line and grade sensitive drives and curved drives • Drives requiring specific casing types such as RCCP, vitrified clay, polymer-concrete, and steel casing VERSATILE TUNNELING Robbins MTBMs bore tunnels with unique and versatile specifications that are determined by customer preference as well as project and technical requirements. Ranging in diameter from DN 250 to DN 3000. Soft ground, mixed face or rock formations. Standard systems can operate with hydrostatic head up to 3 bar. Boring units of DN 1100 and larger can be manufactured with face access, which allows back-loading cutting tools to be safely changed and inspected from within the MTBM. Offers both analog and digital guidance/data logging systems Custom-sized machines are also available. AVAILABLE FOR PURCHASE OR LEASE

SLURRY MICROTUNNELING (MTBM) Thrust Bearing Drive Motor & Reduction Gearbox Steering Cylinders Cutter Wheel Hydraulic Power Unit Laser Target Face Valves Discharge Line Bypass Valves FRONT VIEW CORPORATE HEADQUARTERS The Robbins Company 29100 Hall Street Solon, Ohio 44139 USA P + 1 440 248 3303 F + 1 440 248 1702 Email [email protected] Visit www.TheRobbinsCompany.com for more information. Copyright 2014 The Robbins Company