Trenchless construction has become an accepted means of utility construction and is used on a regular basis for a wide variety of projects. A key component of the design and construction of a trenchless installation is the subsurface investigation completed in the early stages of a project as part of the design process. Information needed as part of the trenchless design can vary depending on the type of trenchless method being considered. The geotechnical information collected must be comprehensive and presented in a manner that communicates anticipated ground conditions to the contractor to facilitate preparation of the bid.
This presentation will walk through the process for planning and scoping a geotechnical site investigation for horizontal directional drilling, auger boring, and micro-tunneling. The target audience of the presentation is engineers and designers that have an understanding the various trenchless methods and want to improve their understanding of the geotechnical site investigation requirements.
After attending this program, participants will be better able to:
– Explain of the purpose of completing a geotechnical site investigation for trenchless installation projects.
– Follow the steps necessary to complete an assessment of project requirements for trenchless installations.
– Discuss geotechnical sampling and testing requirements for various trenchless installation techniques.
– Identify reporting requirements for inclusion in the contract documents associated with data collected during the geotechnical site investigation.
Contributor(s)
Robert Martin, P.E.;Stephen McKelvie, P.E.;Alysen Abel, P.E.