Trenchless construction

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

spoil

Construction; Trenchless construction

Earth, rock, and other materials displaced by a tunnel or casing, and removed as the tunnel or casing is installed. In some cases, it is used to mean only the material that has no further use.

closed-face

Construction; Trenchless construction

The ability of a tunnel boring machine to close or seal the facial opening of the machine to prevent or slow the entrance of soils into the machine. Also may be the bulkheading of a hand dug tunnel ...

bentonite

Construction; Trenchless construction

A colloidal clay sold under various trade names that forms a slick slurry or gel when water is added. Also known as drillers mud. See Drilling Fluid.

fluid-assisted boring

Construction; Trenchless construction

A type of Directional Drilling or Guided Boring technique using a combination of mechanical drilling and pressurized fluid jets to provide the soil cutting action.

auger boring

Construction; Trenchless construction

A technique for forming a bore from a drive pit to a reception pit, by means of a rotating cutting head. Spoil is removed back to the drive shaft by helically wound auger flights rotating in a steel ...

impact moling

Construction; Trenchless construction

The use of a tool which comprises a percussive hammer within a suitable casing, generally of torpedo shape. The hammer may be pneumatic or hydraulic. The term is usually associated with non-steered ...