HDPE Joint Repair

Williamsburg, VA

The Job

This HDPE joint repair project is located in Virginia. A sinkhole opened up in a drainage easement maintained by an HOA. The cause of the sinkhole was an improperly-seated joint between two 24″ HDPE stormwater pipes. The sinkhole was large enough that a few minutes of digging with a shovel exposed the entire joint.

The Challenge

The pipe was too small to enter to perform a repair. The joint was also out of spec for a reliable test & seal grouting application.

The Solution

CJGeo recommended chemical grout injection into the joint from the outside of the pipe to grout the annulus between the ID of the female and OD of the male end of the joint.

CJGeo performed this HDPE joint repair in less than two hours onsite. Single component chemical grout injection successfully sealed the entire circumference of the joint. Visual inspection via injection holes was used to confirm the complete travel of chemical grout around the entire area of the joint.

Because the pipe was so accessible, it was very easy to drill into the annulus from the sinkhole and grout the joint externally. This avoided having to perform a traditional trenchless repair process like cured in place pipe lining.

After getting visual confirmation of the entire bell & spigot joint being full of grout, CJGeo backfilled the hole.

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Facing a similar challenge to this HDPE joint repair project? Give us a shout or shoot us a text. Click the state marker for the location of your project for contact info for the appropriate rep.