A sinkhole is caused by solutioning of the bedrock
that eventually produces a hole in the rock. Water and soil seep through the
hole and form an underground domed void. In time, the domed void collapses. The
sinkhole becomes apparent when a surface depression appears above the collapsed
void. If the surface depression affects a building or road, it is a very serious
matter that requires either sinkhole repair or sinkhole remediation.
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Shallow, isolated sinkholes are often repaired by
excavating to rock and building a “plug”. But when a sinkhole is too deep or too
close to a structure, Rembco’s remediation process is ideal. We use specialized
drilling equipment and innovative grouting techniques to treat the sinkhole
without major disruption at the ground surface. Injection pipes are advanced to
bedrock in a grid pattern, and a thick, mortar-like grout is injected to build a
continuous concrete “cap” over the problematic rock features. This technique,
known as cap grouting, prevents further soil loss into the sinkhole but, by
itself, does not return the site to a useable condition. Rembco completes the
sinkhole repair procedure by following the capping operation with compaction
grouting as the injection pipes are withdrawn, to fill voids and restore
adequate bearing capacity in the affected soils.
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Sinkhole Repair System
1998- Rembco Geotechnical Contractors Incorporated.