Large Diameter Tunneling Applications
SAK Can Tackle Tunnels Up to 32-Foot Arch, Whatever the Soil Conditions
Large diameter tunneling, which is suitable for any soil condition, accommodates a wide size and scope of projects, and is often required for sewer line, water line or storm drain installation; it is also utilized for other types of projects that exceed the capabilities of auger-boring equipment and conventional open-trench construction.
Soft-Ground Tunneling
Soft ground consists of various mixtures of clay, silt or sand, and may be found in different consistencies from “firm” to “running.” In soft-ground conditions, SAK has the capability to hand-mine, use slurry pressure balance tunnel-boring machines, and use earth pressure balance machines.
Applications for soft-ground tunneling include sanitary and storm sewers, and water, highway, mass transit, utility and pedestrian tunnels.
Soft-Rock, Hard-Rock Tunneling
Soft rock comes in many forms, including different types of mudstone, siltstone, sandstone and shale. Common types of hard rock include granite and limestone. SAK has the capability to tunnel into the varying types of rock with drill-and-blast, open main beam, single shield and double shield tunnel-boring machines.
Applications for hard- or soft-rock tunneling include sanitary and storm sewers, and water, highway, mass transit, utility and pedestrian tunnels.
Hand-Mined Tunneling
SAK has completed various shapes and sizes of hand-mined tunnels in many different soil types, using liner plate, rib-and-board and timber sets to support the soil or rock.
Applications for hand-mined tunneling include starter tunnels, tail tunnels, utility tunnels, road crossing tunnels and connecting tunnels for structures.
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