Table of Contents
1Scope
2Availabletechniques
3Kindsofwork
3.1Longsections
3.2Crossings
3.3Urbanenvironment
4Siteinvestigation
5Preparatorysteps
5.1Useoftrenchlesstechniquesnotrequiringthe
excavationofalaunchpit
5.2Useoftrenchlesstechniquesthatrequirethe
excavationofalaunchpit
6Drillingoperations
6.1Guidedboring/directionaldrilling
6.2Impactmoling
6.3Piperamming
6.4Pipe-jackingandmicro-tunnelling
7Recordkeepinganddocumentation
8Groundconditions
8.1Guidedboring/directionaldrilling
8.2Impactmoling
8.3Piperamming
8.4Pipe-jackingandmicro-tunnelling
9Applications
9.1Guidedboring/directionaldrilling
9.2Impactmoling
9.3Piperamming
9.4Pipe-jackingandmicro-tunnelling
10Conclusion
11Glossary
APPENDIXI-Availabletechniques
I.1Guidedboringanddirectionaldrilling
I.2Impactmoling
I.3Piperamming
I.4Pipe-jackingandmicro-tunnelling Abstract
Describes the main techniques which allow installation of underground telecommunication network infrastructures minimizing or eliminating the need for excavation. These techniques, commonly known as trenchless or no-dig techniques, create a horizontal bore below the ground in which the underground infrastructure (ducts, pipes or direct buried cables) can be placed.
