of Site Investigation Techniques for Geological Hazard Assessment for new
Pipes installed using Trenchless Technology Techniques
by Afshin Mantegh, Masters of Science in Earth Science, Thesis, University of Waterloo, 2001
This thesis outlines site investigation requirements and hazards associated with new pipelines installed using trenchless technology methods. This thesis focuses on hazards encountered when using horizontal directional drilling (HDD) and microtunneling techniques. The reasons that these two techniques have been focused on are:
The survey data was analyzed to identify the potential geological hazards for HDD and microtunneling. A compilation of geological hazards encountered along with scoring of severity of these hazards is provided in this research. In addition, site investigation techniques commonly used by practitioners were evaluated using the data obtained from the analysis. To estimate the costs associated with geological hazards, the important cost factors that are believed to impact HDD and microtunneling operations were assessed as well.
Areas for future work consist of the development of cost profiles for different stages of proposed site investigation programs, as well as methods for assessing the effectiveness of site investigation, and the improvement of hazard assessment for other new pipeline installation methods such as moling, pipe ramming, pipe jacking and auger boring.