50 Terms
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Trenchless construction
Underground construction that involves little or no surface trenches so it has minimal disruption to traffic, business, and other activities. Trenchless technology is a fast growing sector of construction and civil engineering that covers such methods as boring, drilling, tunneling, and pipe ramming.
Industry: Construction
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Trenchless construction
guided boring
Construction; Trenchless construction
A Term applied in Europe to Mini- and sometimes Midi Horizontal Directional Drilling. It is a steerable system for the installation of pipes, conduits and cables using a surfaced-launched drilling ...
shield
Construction; Trenchless construction
A steel cylinder at the face of a utility tunnel or casing, which may sometimes employ the use of a mechanical excavator and may be steerable, and provide hazard protection from the area covered.
jacking pit
Construction; Trenchless construction
(Entrance Pit, Bore Pit, Jack Pit, or Borehole - in years past, it has also been known as a Glory Hole): The excavation that the machinery is set into to install a casing or tunnel.
auger
Construction; Trenchless construction
A flighted Drive tube having hex couplings at each end, to transmit torque to the cutting head and transfer spoil back to the machine.
rotary rod machine
Construction; Trenchless construction
A machine used to drill earth horizontally by means of a cutting head attached to a rotating rod (not an auger). Such drilling may include fluid injected to the cutting head through a hollow rod.
microtunnel boring machine (MTBM)
Construction; Trenchless construction
The microtunnel boring machine (MBTM) refers to the microtunnel shield jacked through the earth which excavates the ground while simultaneously installing pipe, as spoil is excavated and removed. ...
horizontal rotary drilling
Construction; Trenchless construction
The mechanical installation of pipe or casing by rotating methods which do not use augers for the removal of spoil. Usually uses a fluid of water and Bentonite to remove spoil.
