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DISCOVER →In Orlando, in-situ testing provides direct evaluation of subsurface conditions without sample disturbance, essential for navigating Central Florida's karst limestone, loose sands, and high water table. Our field programs align with ASTM standards and Florida Building Code requirements for site characterization. The field density test (sand cone method) is widely specified here to verify engineered fill compaction above irregular limestone pinnacles and solution channels common across Orange County.
Commercial developments, roadway expansions, and stormwater retention basins routinely require this testing to confirm bearing capacity and prevent differential settlement. Our geotechnical team integrates these results with laboratory strength analysis and settlement monitoring for comprehensive foundation design assurance. For deeper strata profiling in Orlando's variable geology, we pair surface methods with advanced borehole logging to deliver complete stratigraphic confidence.
Before selecting an anchor type, we map the limestone surface with borings and electrical resistivity to identify pinnacles and cutters. Soil and rock samples go through our in-house lab for direct shear and unconfined compression, giving us the strength parameters needed to size the bond zone accurately.
We prepare detailed, signed-and-sealed design drawings showing tendon type, bond length, free length, corrosion protection details, and lock-off load. Every package includes global stability checks and facing connection calculations, formatted to meet the City of Orlando and Orange County permit review requirements.
Our engineers are onsite during the installation of the first production anchors to verify drilling methods, grout take, and tendon alignment. We run performance and proof tests in accordance with PTI standards, interpret the load-displacement curves, and adjust subsequent anchor lengths if the karst conditions prove more fractured than expected.
PTI DC35.1-14 – Recommendations for Prestressed Rock and Soil Anchors, FHWA GEC No. 4 – Ground Anchors and Anchored Systems, ASTM A416/A416M – Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete
An active anchor is tensioned to a specified lock-off load right after grouting cures, applying a pre-compressive force to the structure. A passive anchor isn’t stressed until the ground or wall starts to move. In Orlando we typically use active tiebacks for excavation support and passive rock bolts for slope stabilization, though the choice depends on allowable deflections and the karst risk at the site.
For a typical retaining wall or shoring project in the Orlando area, a complete design package including geotechnical investigation, anchor sizing, and signed-and-sealed drawings ranges from US$1,120 to US$3,640, depending on the number of anchor rows and the complexity of the karst evaluation required.
We monitor grout take continuously during installation. If the take exceeds 2.5 times the theoretical volume, we switch to a low-mobility grout or use a packer system to isolate the loss zone. In some areas of Orlando with known solution features, we pre-grout the borehole before installing the tendon to fill open voids and prevent future settlement around the bond zone.
Permanent anchors follow the PTI DC35.1-14 recommendations, which require a performance test on at least 5 percent of the anchors and a proof test on the remaining ones. Each anchor is loaded to 133 percent of the design load and held while measuring creep. In Orlando’s karst we also specify long-term monitoring with periodic lift-off checks because of the unpredictable behavior of fractured limestone over time.
Yes, we regularly design active anchors to resist wind uplift on large-span structures, transmission towers, and high-wall signs. The design combines ASCE 7-22 wind loads for the Orlando region with the allowable bond stress from our site investigation, ensuring the foundation can handle both the sustained tension and the cyclic loading from frequent summer storms.
We serve projects across Orlando and its metropolitan area.