{"id":6209,"date":"2017-04-06T23:26:07","date_gmt":"2017-04-07T06:26:07","guid":{"rendered":"http:\/\/robbinstbm.com\/%d0%bd%d0%b0%d1%88%d0%b0-%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%86%d0%b8%d1%8f\/tunnel-boring-machines\/crossover-machines\/"},"modified":"2017-06-06T13:20:44","modified_gmt":"2017-06-06T20:20:44","slug":"crossover-machines","status":"publish","type":"page","link":"https:\/\/www.robbinstbm.com\/ru\/%d0%bd%d0%b0%d1%88%d0%b0-%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%86%d0%b8%d1%8f\/tunnel-boring-machines\/crossover-machines\/","title":{"rendered":"Crossover Machines"},"content":{"rendered":"

Tunnel Boring Machines<\/h1>\n

The Next Generation of Versatility<\/h2>\n

Crossover TBMs take the Guesswork out of Mixed Ground Tunneling<\/h3>\n

Whether the geology of your project includes sections of hard rock, soft ground, boulders, or a little bit of everything, Robbins has a solution for you.\u00a0 Not all projects fit within the parameters of specific TBM types, and at Robbins we believe that your machine should be custom-engineered for your unique project requirements.<\/p>\n

The Crossover Solution<\/strong><\/p>\n

For the most difficult projects, Robbins Crossover TBMs can offer time-saving and efficient tunneling.\u00a0 Whether the hybrid design converts between EPB and hard rock modes, between Slurry and hard rock, or between EPB and Slurry is up to you.\u00a0 From heavy duty screw conveyors that handle rock to interchangeable cutting tools, Robbins Crossover TBMs are designed to cross between ground conditions that would typically require multiple machines.<\/p>\n

What is a Crossover TBM?<\/strong><\/p>\n

Crossover TBMs are machine designs that feature advantages from two different types of TBMs, and can \u201ccross over\u201d between widely varying ground types that would normally require multiple machines. They are also known as hybrid or dual mode machines in the tunneling industry. For more on the various Crossover TBMs, please click on the links below to learn more about each machine type.<\/p>\n

Crossover Rock\/EPB (XRE) TBM<\/a><\/span><\/u><\/h3>\n

Standing for a Crossover (X) between Rock (R) and EPB (E), the XRE has been designed and deployed by Robbins on multiple projects that feature sections of both hard rock and soft ground in the tunnel alignment. Using features of both EPB and Single Shield Hard Rock machines, the XRE has successfully been used on mixed ground projects in Australia, Turkey, Mexico, India, and more. Download a specification sheet here.<\/a><\/p>\n

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Ideal in Unstable Ground<\/strong><\/p>\n

The XRE\u2019s unique design features make it a strong choice for mixed face rock and non-self-supporting ground. A single direction cutterhead cuts down on tool and machine wear and eliminates the problem of regrind, which causes undue wear on machine elements.\u00a0 Two-speed gearboxes efficiently use power to generate high torque at low RPM, allowing the XRE to get through squeezing geology and fracture zones that might leave other machines stuck.<\/p>\n

Adaptable Design<\/strong><\/p>\n

The XRE is a versatile machine that can be customized in a number of ways. Design features often include mixed ground cutterheads with a combination of disc cutters and carbide bits.\u00a0 These machines may offer conversion between a fully pressurized EPB mode and non-pressurized EPB mode, as well as a non-pressurized shielded hard rock mode.\u00a0 Typically conversion is done by changing out the system of muck removal or by using a specialized muck removal system.\u00a0 Muck removal conversions may involve using a robust screw conveyor that can excavate rock, switching from screw to belt conveyor in the tunnel, or converting between an open\/closed center-mounted screw conveyor.<\/p>\n

LARGE DIAMETERS<\/strong><\/h3>\n

At diameters over 12 m, the XRE design becomes even more versatile. Large XRE TBMs can be designed without compromising one machine type over the other.\u00a0 Current setups allow the belt conveyor to remain in place along with the screw conveyor, eliminating the conversion step between screw and belt.\u00a0 Instead, a hydraulic muck ring moves the conveyor into place if hard rock is encountered.<\/p>\n

\u201cThe performance of the XRE machine has been very good given the geology we have encountered during the project. We do plan to use Robbins for upcoming projects.\u201d \u2014 Andr\u00e9s Alan\u00eds, CEO of RECSA group, contractor for TEP II<\/p><\/blockquote>\n

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Proven in the Field<\/strong><\/p>\n