Copyright 2010 • Printed in USA Corporate Headquarters: The Robbins Company 29100 Hall Street Solon, Ohio 44139 USA Phone: +1 440 248 3303 Fax: +1 440 248 1702 Email: [email protected] For more locations, visit our website: www.TheRobbinsCompany.com EARTH PRESSURE BALANCE

SIMPLY A BETTER WAY TO TUNNEL. In soft ground, selecting the correct tunnel boring machine is anything but easy. We understand your concerns: maintaining face stability, maximizing machine speed, stabilizing segment rings and avoiding ground settlement. Robbins Earth Pressure Balance Machines (EPBs) have been proven around the world, in countries including India, China, the U.S., Azerbaijan, and the Dominican Republic. Each machine is backed by our commitment to quality and cooperation that has been the essence of our name for over 50 years. From 3 m to over 15 m machines, every project requires...

Whether your project is in clay, sand, gravel, or mixed I ground, Robbins cutterheads will get you through it. From interchangeable cutters to smooth flow designs, our cutterheads are built to maximize advance rates. Everything Running Smoothly For soft ground, Robbins smooth flow spoke-type cutterheads are unparalleled. The cutterheads fea- ■ ture a large opening ratio, which means that more material can be excavated while easily maintaining pressure and stability at the face. Specialized periph- ery tools are added based on ground conditions, in order to prevent cutterhead rim wear. Robbins...

THE URBAN TUNNELING SOLUTION. When you are tunneling beneath city streets and building foundations, ground disturbance is not an option. Our cutterheads operate with higher torque and slower cutterhead rotation than the industry standard—a combination that results in fast excavation while preventing surface subsidence. The specific torque and cutterhead speed are based on your project’s needs. Less Wear, Fewer Consumables Why slower cutterhead rotation? Not only does it decrease ground disturbance in a wider range of geology, it often requires less additives and results in less abrasive wear...

EXCELS UNDER PRESSURE. In soft ground, the pressure is on. Selecting a screw conveyor is not only about muck removal—it also affects your face pressure control and productivity. Conveyors are a science that keeps your machine advancing through a wide variety of pressures and ground conditions. Screw conveyors are available in shaft-type and ribbon-type designs, as well as single or double setups. Hybrid systems can incorporate both a screw conveyor and a belt. Robbins engineers understand the importance of selecting the correct configuration for the geology. From start to finish, Robbins screw...

BETTER BACK-UP, FEWER PEOPLE. From 1.6 m to more than 15 m in diameter, the range of Robbins back-up designs is broad. Robbins engi- neers work closely with your team to ensure that your back-up not only supports the TBiyi excavation, but also provides you with the best systems for personnel safety, segment delivery, segment lining, back-filling, tunnel de-watering, fresh air ventilation, lighting, and Efficient Advance Robbins works with your tunneling requirements to' produce streamlined logistical support systems that reduce the number of personnel. Simple solutions for processes such as segment...

BECAUSE ADDITIVES ARE NOT JUST AN ADD-ON. At Robbins, we know that the proper additive system is critical to the success of your project. From injection at the cutterhead to back-filling behind the machine, we see ground treatment as a remedy for many common problems. Stable Solutions From foam to polymer to bentonite, the ideal combination of additives stabilizes the tunneling face in any number of ground conditions. Robbins incorporates methodologies from around the world into its machines, all to provide an optimal system for your tunnel. The proper additives do more than just stabilize the...

WE’RE WITH YOU THROUGH EVERY TWIST AND TURN. Whether straight or curved, Robbins EPBs are designed to maintain tunnel alignment from start to finish. With powerful thrust cylinders and efficient cutterhead drives, we’re committed to keeping you on track. A Smarter Way to Turn Curved tunnels are commonplace in soft ground, but they don’t have to cause complications. Many manufacturers continue to use passive articulation systems that can result in cracked concrete lining. At Robbins we have a solution: active articulation that allows our EPBs to tackle tight turns with ease and avoid segment deformation....

Copyright 2010 • Printed in USA Corporate Headquarters: The Robbins Company 29100 Hall Street Solon, Ohio 44139 USA Phone: +1 440 248 3303 Fax: +1 440 248 1702 Email: [email protected] For more locations, visit our website: www.TheRobbinsCompany.com EARTH PRESSURE BALANCE