Annular Space Grouting

Annular Space Grouting, Bluefield, Virginia

Problem:

60 inch culvert pipe under the entrance to a large shopping center failed. Contractor slid a 48″ OD Snap-Tite slip lining pipe through the length of the culvert, which then required annular space grouting. The culvert pipe was 160 feet long, and passed between a standard end wall and a vertical storm water outfall riser.

Constraints:

Snap-Tite pipe requires installation pressures of around 5 psi. Due to the crushing of the carrier pipe, the material used for annular space grouting had to be able to pass the constricted area and still achieve complete filling.

Solution:

30 PCF wet-cast density lightweight cellular concrete was chosen for the annular space grouting. Lightweight cellular concrete is easily placed at pressures below the requirement for Snap-Tite pipe.

Results:

CJGeo cellular concrete crew installed approximately 50 cubic yards of lightweight cellular concrete to completely fill the annular space.