Aaron Davey is a civil engineer with a broad career in water/wastewater and a Master in Business. Starting out as an army engineer, he has since spent 24 years working in consultancies, public utilities, and contracting businesses. He has held roles at all levels from the trenches to project management, design, senior management and owner. During his time he has experienced the shift towards greater HDPE use in water utilities. Now an engineer at the Alliance for PE Pipe, Aaron works with water engineers in HDPE pressure pipe adoption and specification. He is a member of AWWA and ASCE.

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Alan has a BS in Civil Engineering, a MS in Environmental Engineering, holds three patents, and led an effort to publish a technical book on pipe bursting for the North American Society for Trenchless Technology. Alan’s work with the Alliance for PE Pipe has focused on developing municipal understanding of the use of HDPE for a wide variety of projects. Alan is passionate about continuing education and often presents at conferences. Alan has designed nearly 400,000 linear feet of pipeline projects, assisted in over 100 miles of HDPE projects and endeavors to grow the use of trenchless technologies for municipalities.

High Density Polyethylene (HDPE) pipe is increasing in popularity for installation in municipal water and wastewater systems. HDPE has been widely used for trenchless technology installations, such as horizontal directional drill (HDD), pipe bursting and sliplining. Installation of HDPE through traditional open cut construction is increasing as municipal use of the material continues to grow. Pipe installation references provide typical design parameters as to which extensive design analysis is not required. Some installations fall outside of these parameters and this paper will highlight areas of installation as to which the designer should perform the detailed analysis. This paper will provide detailed information on calculating important design installation equations. Project examples calculating wall buckling and compressive stress, pipe deflection, allowable external pressure for unconstrained pipe, allowable tensile stress during trenchless pull-ins and more. Available references providing detailed information on calculations and installation procedures will be provided. Actual project examples will be provided in order to help the audience translate the analysis from equations to field installation conditions. While the focus on the paper is HDPE, the presentation of unique installation conditions requiring additional pipe installation calculations would be useful for any pipe material and engineering analysis.