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Curtain grouting is carried out to make the rock mass less permeable at a given line (or two or three parallel rows). Depth of grout curtain holes vary from a few meters to more than 150 m.

Consolidation grouting aims to improve rock mass (foundation) strength, permeability and reduce its deformability and executed in an area rather than a line. Usually, grout holes for consolidation grouting are less than 15 m deep.

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Q: What is the difference between curtain grouting and consolidation grouting?
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