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The most common and effective sinkhole repair method, compaction grouting involves injecting Portland cement grout under high pressure onto the surface of the limestone bedrock and into the soils above the limestone. The grout seals the surface of the limestone bedrock (to help prevent future dissolution of the limestone) and strengthens the soil above the limestone.

The Procedure:

The process begins with the drilling of grout casing (pipes) downward until the competent (strong) limestone bedrock is reached. In cases where a home or building is present, some of the casing is installed vertically along the building or house perimeter to treat the soils supporting the exterior load-bearing walls, while some is installed at an angle to treat the soils supporting the interior of the home or building. Grout is then pumped under high pressure through the casing and into the ground, first at the surface of the limestone bedrock and then at pre-determined points in the soils above the limestone.

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Great Monday

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