Horizontal Directional Drilling  - The Importance of Pullback Support Design and Planning
Publications September 1, 2020

Horizontal Directional Drilling  - The Importance of Pullback Support Design and Planning

Most commonly overlooked part of any Horizontal Directional Drill (HDD) design is the product pipe pullback support. Design of this part of the process can be just as important as the downhole design for a successful bore-path installation, or even more so.
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Evaluation of Methods Used to Estimate the Required Thrust Force for Direct Pipe Installation Within Clayey Soil Based on Case Studies
Publications November 1, 2019

Evaluation of Methods Used to Estimate the Required Thrust Force for Direct Pipe Installation Within Clayey Soil Based on Case Studies

Direct Pipe InstallationTM (DPI) is becoming a more prominent construction method in the pipeline crossing industry. DPI involves connecting a micro tunnel boring machine to a section of welded pipeline and utilizing a thruster on surface to push the pipeline through the ground while excavation of the soil by the MTBM commences.
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Victoria Harbor HDD Project: A Comprehensive Comparison of Detailed 3D Pullback Modelling and Actual Pullback
Publications October 28, 2019

Victoria Harbor HDD Project: A Comprehensive Comparison of Detailed 3D Pullback Modelling and Actual Pullback

The Capital Regional District (CRD) of Victoria, BC is constructing a new wastewater treatment facility. A pipeline was required to cross the Victoria Harbor between Ogden Point and McLoughlin Point. Due to the large volume of marine traffic, a trenchless methodology was chosen.
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Experimental Study on Pullback Loads for Steel Pipelines Installed by Horizontal Directional Drilling
Publications September 30, 2019

Experimental Study on Pullback Loads for Steel Pipelines Installed by Horizontal Directional Drilling

The importance of site-specific factors are often neglected which has led to significant discrepancies between expected forces and observed values during construction. Pull force estimation during Horizontal Directional Drilling (HDD) is one of the essential steps during planning and design phases of bridge projects.
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