Professional engineers performing high-quality tests for professional engineers performing high-quality geotechnical engineering design
Letters Of Endorsement
Seafloor Direct Push System
Our seafloor direct push system is placed on the mudline of a river and enables us to perform either cone penetrometer or dilatometer with true interval seismic tests, satisfying ASTM standards for a constant push rate of 2 centimeters/second.
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Portable Direct Push System
Our portable direct push system that can move through a 32-inch wide door opening and bolt to the concrete slab with Hilti anchors next to the structure’s footings.
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Cone Penetrometer Test
Data from CPT soundings accurately predict vertical pile capacities, as they model cylindrical piles. The CPT probe quasi-statically penetrates the soil at a constant 2 cm/sec rate measuring the tip, side friction and pore pressure using calibrated strain gauges and transducers.
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Soil Pressuremeter Test
Data from pressuremeter tests accurately predict vertical and lateral capacities for piles and settlement of shallow foundations based on the large data base of load tests and pressuremeter tests that the French Department of Public Works (LCPC) has collected.
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Rock Pressuremeter Test
Rock pressuremeter tests can be used for lateral load and deformation analyses of drilled shafts. We use a rock pressuremeter that applies up to 300 bars of pressure.
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Soil Borehole Shear Test
The BST , developed by Dr. R. L. Handy at Iowa State University, provides a convenient method to accurately measure the drained shear strength of soils in-situ.
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Rock Borehole Shear Test
Dr. Handy developed a rock borehole shear test (RBST) device to measure the shear strength properties of rock.
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Ko Step Blade Test
Dr. Handy invented this test to measure the horizontal coefficient of horizontal earth pressure at rest. From thin to thick steps from its bottom to top of the blade, the four round membranes expand laterally measuring the horizontal earth pressure.
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Vane Shear Test
The vane shear test accurately determines the undrained shear strength of purely cohesive soils by rotating a small vane having four blades around its vertical axis to fail a cylinder of soil in torsional shear.
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SPT Torque
K0 Step Blade (KSB): While engineers can estimate the vertical stress of soil relatively accurately, they cannot estimate the horizontal stress. The coefficient of horizontal stress, K, ranges from 0.2 to 6 times the vertical stress (Schmertmann, 1985).
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