12-in. Water Line Horizontal Directional Drill across Hunting Bayou using Cartridge Method


12-in. Water Line Horizontal Directional Drill across Hunting Bayou using Cartridge Method

Authors:

Christine Kirby, Lockwood, Andrews & Newnam, Inc., Houston, Texas United States
Eric Hernandez, Lockwood, Andrews & Newnam, Inc.
Anh Hunter, City of Houston Public Works
Samson D'Silva, City of Houston

Abstract: A 12-inch water line extension was identified along a 3,600 ft. section of IH-10 East Freeway in Houston, Texas, to allow customer services to be transferred from an aging 42-inch PCCP that needed to be isolated for repairs. However, the constructability of this 12-inch water line posed some daunting challenges.

At Hunting Bayou, a 600- ft. trenchless crossing was to be installed using horizontal directional drilling. One of the challenges that came with this crossing was the inability to string out the full pipe length prior to pullback without obstructing driveways and the Centerwood Drive intersection. Therefore, the cartridge method of engaging each joint as the pipe was being pulled back was recommended. Certa-Lok® C-900 RJIB (restrained joint integral bell) pipe was specified. The Contractor drilled the pilot hole and reamed with 2 passes. After the final pass was complete, approximately 100 ft. of pipe joints were assembled and were pulled into the hole. As the driller was pulling the pipe in, the contractor engaged each joint one-by-one. After the first few joints were pulled in, the drill stem broke on the machine at the entry side of the crossing. The Contractor was able to replace the broken stem and continue with the installation. The complete pipe string was successfully pulled in within a matter of hours on May 19, 2018. The pipe passed hydrostatic test on June 8, 2018.

After the project was tested, disinfected, placed in service, and customers transferred, substantial completion was issued on June 18, 2018.

Publication Date: 2019

Presented at:
NASTT’s 2019 No-Dig Show Chicago, Illinois
March 17-21, 2019 | Paper Number: TM1-T2-05


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