Sinkhole Repair

Sinkhole Repair, Williamsburg, Virginia

verified sealing of HDPE pipe joint causing sinkhole

Problem:

A sinkhole opened up in a drainage easement maintained by an HOA.  The cause of the sinkhole was identified as an improperly-seated gasketed joint between two 36″ HDPE stormwater pipes.  The pipes were approximately 5 feet below the surface, where there was a 3′ diameter sinkhole.  The pipe had been poorly installed, so it suffered extensive ovaling due to compression of the top during compaction without lateral support. 

Solution:

Chemical grout injection into the sinkhole from the surface to fill the sinkhole and seal the pipe joint. 

Results:

Single component chemical grout injection successfully sealed the entire circumference of the joint.  Visual inspection from the inside of the pipe was used to confirm this..