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Sinkhole Investigation and Grouting: Novel Recommendations for a Pipeline Right-of-Way

by John T. Pusey, Jr., Assistant Director of Field Operations; Earth Engineering, Inc., East Norriton, PA, johnp@earthengineering.com,
John M. Caccese, P.E., (M.ASCE), Vice President; Earth Engineering, Inc., East Norriton, PA, johnc@earthengineering.com,


Serial Information: Geo-Strata —Geo Institute of ASCE, 2014, Vol. 18, Issue 6, Pg. 38-43


Document Type: Feature article

Abstract:

In 2009, numerous sinkholes developed within and adjacent to a 400-ft-long section of high-pressure, petroleum pipeline right-of-way that crosses under a local creek in Plymouth Meeting, PA. A feasability study was subsequently conducted to determine the most cost-effective and practical long-term solution for a pipeline at the site. Options included: 1) subsurface grouting within the right-of-way; 2) structurally supporting the pipeline on a deep foundation system; and 3) relocating the pipeline to a less sinkhole-prone portion of an adjacent property. Due to the high costs of subsurface grouting and deep foundation remedies, the owner decided to pursue the option of relocating the pipeline.

Subject Headings: Sinkholes | Pressure pipes | Pipelines | Land use | Grouting | Subsurface environment | Site investigation

 

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