| This thesis presents the results of a field and laboratory testing program that was utilized to understand the strain and load applied on high-density polyethylene pipes (HDPE) installed in a cohesive and cohesionless soil medium through the horizontal directional drilling process. Additionally, the response of several drilling rig parameters was captured during these installations, which included the pullback, rotational, and drilling fluid pressures. Three different pipe diameters were installed in each soil medium: 114 mm outside diameter (O.D) SDR 17 HDPE pipe, 219 mm O.D. SDR 17 HDPE pipe, and 324 mm O.D. SDR 17 HDPE pipe. Samples of the pipe material were collected both prior to and following installation to manufacture testing coupons. The sample coupons were tested in a tensile testing machine to determine the modulus of elasticity through the 2% secant method. Conclusions on the data developed through both the field and laboratory testing are subsequently presented. |
