Ground Improvement

They are two distinct methods used for different ground conditions. Polyurethane grouting injects a dual-component hydrophobic polyurethane grout through small-diameter port pipes — it expands to fill voids and densify loose near-surface material, and is ideal for slab lifting, void fill, and near-surface foundation stabilization. Minimal cure time, small footprint, no excavation required. Compaction grouting injects a stiff, low-mobility grout mass under pressure to mechanically densify weak or loose soils at depth — used when the primary problem is deeper bearing capacity failure that polyurethane cannot reach. GSI evaluates both options and recommends based on subsurface conditions and depth of treatment required.

Yes — and this is one of the key advantages of GSI's grouting approach on active data center sites. Polyurethane and compaction grouting operations require a relatively small working footprint and can be sequenced around active construction without significant interference. Real-time elevation monitoring allows the grouting crew to work in proximity to active operations with full documentation of stability at each pad location.

Transformer pad settlement on data center sites is most commonly caused by poor subgrade soil conditions — loose fill, weak native soils, or soils with low bearing capacity not adequately identified or treated during site preparation. It can also result from void formation beneath pads due to water infiltration, soil piping, or subsurface erosion. GSI assesses each situation before recommending a treatment approach, because the right solution depends on the specific cause and depth of the problem.