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Geotechnical Field Services
Simply put, the field technician is the eyes and ears of the certifying engineer and can make or break a project, possibly leading to catastrophic conditions in the future. To perform field testing at an acceptable level, the technician must understand the principals behind the tests, the intent of the design, the material characteristics, and be able to discern when the test numbers are not geotechnical-1representative of the actual conditions they are observing in the field.
Too many technicians do not function beyond just recording the test data — they fail to make the correlation to what they are actually observing. One example of this is when a technician writes down a passing compaction test, yet fails to observe that the material has changed, or that the lift shows signs of bonding failure. Either of these scenarios jeopardizes the integrity of the clay liner and can lead to substantial problems in the future — problems that are unrecognized by the certifying engineer whose eyes and ears have failed him.
Applications
- Structural fill / Sub-base construction
- Compacted Clay Liners
- Subgrade Preparation
- Test Pads
Soils Methods
- Nuclear Densitometer
- Drive Cylinder
- Sand Cone
- Field Moisture
Sampling
The importance of obtaining representative samples of any construction material will result in increased efficiency during the construction process and help keep project costs within the anticipated budgets. Far too often, project delays in construction develop because the materials change was not noted, or were not sampled properly. We carefully monitor each sample source and test pit for any variances that could cause problems during construction.
Methods
- ASTM Standards
- Bulk Samples
- Shelby Tubes
- Split Spoon Sampling
Materials
- Soils
- Aggregate/Sand/Gravel