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

tunnel boring machine (TBM)

Construction; Trenchless construction

1) A full-face circular mechanized shield machine, usually of Personnel-Entry diameter, steerable and with a rotary cutting head. For pipe installation it leads a string of jacked pipes. It may be ...

duct

Construction; Trenchless construction

In many instances, a term interchangeable with pipe. In the boring industry, it is usually used for small plastic or steel pipes that enclose wires or cables for electrical or communication usage.

split design

Construction; Trenchless construction

A boring machine having the capability of being broken down into two or more sections to reduce the lifting weight.

wrapped casing

Construction; Trenchless construction

A coating on pipe for protection from corrosion, usually composed of asphalt and asphalt coated paper. Some coatings may contain plastic, fiberglass, coal tar, or other materials.

cutterhead or cutting head

Construction; Trenchless construction

The actual teeth and supporting structure that is attached to the front of the lead auger, drill stem or front face of the tunnel boring machine. It is used to reduce the material that is being ...

pipe jacking

Construction; Trenchless construction

A system of directly installing pipes behind a Shield Machine by hydraulic jacking from a Drive Shaft such that the pipes form a continuous string in the ground. Usually personnel are required ...

jacking shield

Construction; Trenchless construction

A fabricated steel cylinder from within which the excavation is carried out either by hand or machine. Incorporated within the shield are facilities to allow it to be adjusted to control line and ...