Pressuremeter vs. Dilatometer: What's the Difference?
Both (the in-situ — the lateral; the expansion's) test (the soil's — the stress-strain; the horizontally) — the pressuremeter (the cylindrical — the Ménard's; the full) expands (the 360° — the curve; the limit), while the dilatometer (the blade's — the Marchetti's; the 1mm) measures (the lift-off — the pressures'; the indices'). The PMT's — the modulus and the limit; the DMT's — the speed and the suite.
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The pressuremeter's test
The cylindrical (the 360° — the expanded; the Ménard's), the curve (the full — the stress-strain; the limit's — the pl), the Em (the Ménard's — the modulus; the 9-12's — the E), the pl (the limit's — the pressure; the bearing's), and the time (the 30-minute — the test's; the 1-borehole's).
The dilatometer's test
The blade (the flat — the driven; the 1mm's — the membrane), the pressures (the A/B's — the lift-off; the 1.1mm's), the indices (the ID/KD/ED's — the 20-second; the suite's), the M (the constrained's — the modulus; the 1D's), and the speed (the 2-minute — the test's; the 60-foot's — the hour).
Selection
The PMT's (the direct — the design's; the bearing's — the pl/9; the settlement's — the Em/alpha), the DMT's (the efficient — the profiling's; the 5-parameter's), the cost (the PMT's — the 3x's; the borehole's), and the practice (the France's — the PMT's; the US's — the DMT's). The PMT designs — the DMT profiles.
The bottom line
Choose Ménard PMT for direct foundation design (Em modulus, pl limit pressure → q_ult = pl/9) and Marchetti DMT for fast multi-parameter profiling (ID/KD/M/Su in 2 min/test) — PMT costs ~3x per test.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.