Most repairs complete in 1 to 2 weeks depending on the void's size and whether grouting alone is sufficient or excavation and backfill are needed.
Sinkhole repair starts with identifying the failure type, a sudden cover-collapse sinkhole where a limestone cavity's soil ceiling gives way all at once, or a cover-subsidence sinkhole that settles gradually as fines ravel into a karst conduit, before designing a fix. Repair typically combines excavation and structural backfill, compaction or chemical grouting to consolidate surrounding soil, and a soil nail wall where the sinkhole has undercut a slope or road edge.
In San Antonio, the Balcones Fault Zone runs directly beneath much of the developed area, creating a network of fractures and faults in the Edwards Limestone that's more extensively broken up than in cities further from the fault line. GSI's San Antonio sinkhole repair work typically includes:
Most repairs complete in 1 to 2 weeks depending on the void's size and whether grouting alone is sufficient or excavation and backfill are needed.
Cost depends on void size, depth, and repair method, which we confirm with subsurface investigation before a fixed-cost proposal.
Yes. We select fill and grout materials and construction methods that meet the environmental requirements governing work within the Recharge Zone.
GSI offers 24/7 emergency response and can mobilize a crew within hours if a sinkhole opens beneath or near a structure, driveway, or roadway.
The Balcones Fault Zone runs directly beneath much of the city, fracturing the Edwards Limestone more extensively than in areas farther from the fault, which creates more conduits for soil to ravel into.
A localized depression that continues to grow or develops a circular pattern, especially in North San Antonio neighborhoods over the Recharge Zone, warrants inspection before it progresses further.
No. Our repair methods and materials are selected specifically to avoid contaminating or obstructing recharge into the Edwards Aquifer beneath the site.
A properly engineered repair addresses the void and consolidates surrounding soil to prevent recurrence, though we recommend monitoring nearby ground where fault-zone conditions suggest additional cavities may exist.
A cover-subsidence sinkhole along San Antonio's Balcones Fault Zone tends to keep growing until the void beneath it is addressed. Call (855) 599-5217 to get a San Antonio sinkhole assessment from a licensed engineer.
