American Society of Civil Engineers


Long-Term Buckling Performance of HDPE Liners


by Reda M. Bakeer, (Prof., Dept. of Civ. and Envir. Engrg., Tulane Univ., New Orleans, LA 70118-5698), Michael E. Barber, (Assoc. Prof., Dept. of Civ. and Envir. Engrg., Washington State Univ., Pullman, WA 99164-2910), John E. Taylor, (Grad. Student, Dept. of Civ. and Envir. Engrg., Tulane Univ., New Orleans, LA 70118-5698), and Sean E. Pechon, (Grad. Student, Dept. of Civ. and Envir. Engrg., Tulane Univ., New Orleans, LA 70118-5698)

Journal of Materials in Civil Engineering, Vol. 13, No. 3, May/June 2001, pp. 176-184, (doi:  http://dx.doi.org/10.1061/(ASCE)0899-1561(2001)13:3(176))

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Document type: Journal Paper
Abstract: This research examines the long-term performance of high-density polyethylene liners frequently used in rehabilitating pipeline networks. Buckling of two groups of samples—each consisting of 20 steel pipes lined with HDPE liners—was examined in the laboratory. Group A was subjected to a uniform external pressure equal to about one-half of the buckling pressure determined experimentally in a similar short-term test; Group B was subjected to one-third to one-fourth of this short-term pressure. Most liners in Group A failed (buckled) prematurely before the required ASTM of 10,000 h. However, all 20 samples in Group B sustained the applied pressure for over 10,000 h. It was concluded that a design safety factor of 3 to 4 should be applied to short-term pressure to establish the long-term resistance of a flexible liner. Changes in the liner pipe volume with time, under the uniform pressure, were also monitored to estimate long-term creep in the HDPE material.


ASCE Subject Headings:
Buckling
Linings
Pipe materials
Pipes
Polyethylene
Rehabilitation