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DISCOVER →In Orlando, geotechnical investigation begins with understanding the region’s karst geology—sinkhole-prone limestone, sandy surficial soils, and a high water table that demand precise subsurface data. Our investigation services cover everything from initial desktop studies to in-situ testing, strictly following Florida Building Code Chapter 18 and ASTM standards. A cornerstone of this work is the CPT (Cone Penetration Test), which provides continuous soil profiling without cuttings, ideal for detecting soft zones and potential sinkhole activity.
These investigations are critical for foundation design of commercial structures, roadway embankments, and stormwater retention systems across Central Florida. When conditions require deeper stratigraphic correlation, we often pair CPT with targeted laboratory testing to refine bearing capacity and settlement analyses. For projects in historically filled areas, integrating our CPT data with geophysical surveys ensures a complete ground model, reducing risk before construction begins.
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.