Closed construction (line construction)

Horizontal directional drilling machine for trenchless pipeline construction

Starting shaft for the drilling

In pipeline construction , the closed construction method (also called trenchless pipeline construction ) describes the laying of supply and disposal lines without digging along the line. The advantage of the trenchless construction method is that, in contrast to the open construction method, a shaft only needs to be created at the beginning and at the end of a pipe section. Crossing traffic routes ( roads , rails , etc.) remain almost untouched with the closed construction, so that traffic diversions can be avoided. Furthermore, the dust and noise pollution for residents is reduced .

Procedure

Various methods are available for trenchless pipeline construction. These are for example:

• Soil displacement method
• Drilling pressure
• Horizontal directional drilling
• Microtunneling
• Pilot pipe jacking

See also

• Open construction (line construction)
• Trenchless pipe rehabilitation

Literature and standards

• Dietrich Stein: Trenchless line construction . Ernst & Sohn , Berlin 2003, ISBN 3-433-01778-6 ( limited preview in the Google book search).
• DIN 18319: VOB - Part C: General technical contract conditions for construction work: pipe jacking work
• DIN EN 12889: Trenchless laying and testing of sewers and sewers
• DWA-A 125: Pipe jacking and related processes