Methodology
Our approach to geotechnical engineering in Orlando begins with a thorough review of existing geological maps and historical data for the site. We then conduct field investigations, including SPT boring in accordance with ASTM D1586, to characterize soil strata and obtain undisturbed samples. Laboratory testing on recovered samples provides index properties, strength parameters, and consolidation characteristics. All data are interpreted using established geotechnical principles to develop site-specific recommendations for foundations, slope stability, and earth retention. Our methodology ensures that the final design accounts for the local soil behavior and groundwater conditions typical of Orlando.
Reference Technical Parameters
| Parameter | Reference Value |
|---|---|
| Predominant Soil Type | Sand, silty sand, and clayey sand over limestone |
| Maximum Seismic Acceleration (PGA) | 0.05g (ASCE 7-16, Site Class D) |
| Typical Groundwater Level | 2–5 ft below ground surface |
| Bedrock Depth | 10–50 ft (limestone of the Floridan aquifer) |
| Typical N60 Range | 5–20 blows/ft in sands; 30–50+ in cemented layers |
Local Considerations — Orlando
Orlando's geotechnical landscape is dominated by sandy soils underlain by limestone, with the water table typically shallow (2–5 ft). This combination requires careful evaluation of liquefaction potential during seismic events, even with low PGA values. The city's karst topography poses risks of sinkholes, especially in areas where the limestone is near the surface. Our local experience includes projects in downtown Orlando (higher bearing capacity soils) and suburban expansions (more variable fill and organic layers). We also address the challenges of stormwater management and pavement design, which rely on accurate permeability testing. For broader regional context, our team collaborates with our geotechnical engineering en Miami colleagues on projects spanning both markets.
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Services in Orlando
Applicable Standards
- ASTM D1586 (Standard Penetration Test)
- ASCE 7-16 (Minimum Design Loads for Buildings)
- Florida Building Code (FBC) – Chapter 18
- ASTM D2487 (Unified Soil Classification System)
- ASTM D1883 (CBR Test for Pavements)
Frequently Asked Questions
What are the typical soil conditions encountered in Orlando?
Orlando's soils are predominantly sands, silty sands, and clayey sands, underlain by limestone bedrock of the Floridan aquifer. The water table is shallow, often within 2 to 5 feet of the surface. These conditions require careful evaluation for foundation design, especially in areas prone to sinkholes.
Is seismic design required for geotechnical projects in Orlando?
Yes, the Florida Building Code requires seismic design per ASCE 7-16. Orlando has a low seismic hazard with a PGA of about 0.05g for Site Class D. However, liquefaction potential must be evaluated in loose, saturated sands. Our geotechnical reports include site-specific seismic parameters as per code.
Are geotechnical studies mandatory for construction in Orlando?
The Florida Building Code mandates a geotechnical investigation for most structures, especially those with shallow foundations or in areas with known karst features. Local jurisdictions may require additional studies for sinkhole risk. Our team provides the necessary site characterization to meet code requirements.