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Sinkhole Remediation


Sinkholes can occur when water or other forces that displace underground soil, weakening the soil's overall integrity in certain areas. As you might guess, this a severe issue for buildings and houses. When density "gaps" is created in the soil beneath structures, they can sink—slowly, or sometimes dramatically, caused damage.

Many types of soil can see changes with compaction grouting. Compaction grouting is used for stabilization and densification as well as void filling. This method is used to fill the voids in the ground around and under your residence providing foundation reinforcement and can be used for sinkhole repair.

How Does Compaction Grouting Work?

The primary purpose of compaction grouting is to increase the load the soil can bear by adding material to the lower soil layers. To do this, we utilize a limited access drill to drill to the sufficient base. Next, a thick cement mixture is pumped into the ground under high pressure. The soils are compacted as the cement mixture enters the soil.

 The grout seals off the top of layer first as the casings are removed a section by section, the compaction grout increases soil density layer by layer. Finally, the casings are removed from the ground, loaded back on the trailer, and eliminated from the repaired property.

During repair, the sinkhole’s triggering tool must be addressed to minimize new soil settlement or sinking.  As water is generally the prime triggering tool, it is necessary to identify and remove to the area the possible source of the water that may have caused the sinkhole.  It is better to construct the plug (drain stopper) directly at the location of the bedrock draining. This allows the plug to be in direct contact with the bedrock, giving a better seal.

Sinkholes encountered, and where the soil cover is thick, require careful geologic study followed by various costly repair methods, ranging from pressure grouting also called permeation grouting in the subsurface, to driven piles having cement covers and gravel-mat backfilling.

Geo Grout Ground Modification Specialists, Inc. offers several options for repair and foundation remediation.

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