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

drilling fluid

Construction; Trenchless construction

A mixture of water and usually bentonite and/or polymer continuously pumped to the cutting head to facilitate cutting, reduce required torque, facilitate the removal of cuttings, stabilize the ...

drive shaft/entry shaft/drive pit

Construction; Trenchless construction

Excavation from which trenchless technology equipment is launched for the installation of a pipeline, conduit, or cable. May incorporate a thrust wall to spread reaction loads to the soil.

pipe ramming

Construction; Trenchless construction

A technique for installing steel casings from a drive shaft to a reception shaft utilizing the dynamic energy from a percussion hammer attached to the end of the pipe. A continuous casing support is ...

earth piercing

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 ...

utility tunneling

Construction; Trenchless construction

A 2-stage process in which a temporary ground support system is constructed to permit the installation of the product pipe. The temporary tunnel liner is installed as the tunnel is constructed. The ...

expander

Construction; Trenchless construction

A tool which enlarges a bore during a Pull-Back operation by compression of the surrounding ground rather than by excavation. Sometimes used during a Thrust Boring process as well as during ...