Pipeline exposure is a dangerous complication that can actually worsen over time. Pipeline companies are committed to minimizing the danger of an exposed pipeline with prevention and safety measures. Submar is often part of the safety solution to keep the integrity of the pipeline system intact.
In Florida, a 6-inch diameter natural gas pipeline crosses a canal. Sheetflow from the adjacent street and high flow events’ impact had exposed the pipeline. 3-in-1 concrete bags had been placed atop the pipeline in an effort to protect it, but the flow had removed cover behind the bags. If left unprotected, the site risked further damage due to continued pipeline exposure.
The Submar Solution
Submar proposed reinstalling 3-in-1 concrete bags on the banks with additional pipeline erosion control measures.
- Prior to construction, silt curtain was installed to control sediment in the canal and contain it a few feet away from the water surface. The toe of the bank then was excavated to allow the installation of the geotextile fabric beneath the new 3-1 bags to minimize settlement, and the existing concrete bags were hauled off the site.
- The project area was backfilled with granular fill and covered with a non-woven geotextile fabric liner. The new 3-in-1 concrete bags were placed on the bank and conform to the existing bank slopes before and beyond the installation areas to avoid causing eddies. Rebar was driven through the sand-cement riprap to secure the bags.
- The silt curtain was removed after construction, and Curlex and seed were placed on the final grade to ensure streambank stabilization and to prevent further pipeline exposures.
To learn more about how we offer solutions on pipeline exposure, see our projects page.