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 mud

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 ...

receiving pit

Construction; Trenchless construction

1. See Exit Pit. 2. An opening in the earth located at the expected exit of the cutting head or casing. 3. (Come out hole, come out pit) The pit that is dug at the end of the bore, opposite ...

impact machines

Construction; Trenchless construction

A type of machine that pierces the earth (piercing tool) or rams an object to produce a bore (ramming machine).

pull back force

Construction; Trenchless construction

The tensile load applied to a Drill String during the Pull-Back process. Directional Drilling rigs are generally rated by their maximum pull-back force.

drill string

Construction; Trenchless construction

1. The total length of drill rods/pipe, bit, swivel joint etc. in a drill borehole. 2. System of rods used with cutting bit or compaction bit attached to the drive chuck.

entrance pit

Construction; Trenchless construction

An opening in the earth of specified length and width for placing the machine on line and grade. See Boring Pit.

midi-horizontal directional drilling

Construction; Trenchless construction

Steerable surface-launched drilling equipment for the installation of pipes, conduits, and cables. Applied to intermediate sized drilling rigs. Tracking of the Drill String may be achieved by ...