Grouting into a sinkhole without characterizing the void geometry and connection to the karst system is one of the easiest ways to waste grouting budget — grout migrates into the karst network instead of filling the target void, and the surface symptom returns within months. A grouting sub without in-house geotechnical engineering proposes a volume and a price, but can't guarantee the treatment result.
GeoStabilization International begins every sinkhole remediation scope with void characterization — GPR survey, probe drilling, or falling-head permeability testing to define the target treatment zone before the first cubic yard of grout is injected.
GeoStabilization International provides sinkhole remediation and karst void filling subcontract services on highway, commercial, and utility infrastructure projects — from initial void characterization through grouting, testing, and surface restoration.
Before any treatment begins, our engineers conduct void characterization investigations — GPR surveys, probe drilling, and borehole camera inspection — to define the target treatment zone and prevent grout migration into connected karst features.
Engineered void-fill grouting programs inject low-mobility grout into the target void under controlled pressure. GSI's field engineers monitor grout take and refusal at every injection point, confirming void fill progress before advancing the program.
Soils above karst features that have experienced subsidence are densified through compaction grouting programs that improve bearing capacity and arrest future settlement. Our engineers design the treatment grid based on post-void-fill SPT data.
Sinkhole grouting programs that begin without void characterization consistently produce over-treatment in areas that didn't need it, and under-treatment where it mattered. GeoStabilization International's characterization-first approach adds one to two days of investigation time to the program start and typically reduces total grout consumption by 20–40% relative to uncharacterized programs — because our grouting crew targets the void, not the surrounding rock.
For your project, that efficiency reduces the sinkhole subcontract cost and eliminates the remobilization risk from inadequate treatment.
GeoStabilization International responds to subcontract scope inquiries within one business day. Call or complete the form below.
