What Is a Pressuremeter Test in Geotechnical Engineering?
Pressuremeter tests (the PMT — the borehole's; the Menard's) measure (the in-situ — the modulus; the pressure's — the limit) by expanding (the probe's — the cylindrical; the radial) against (the soil's — the borehole's). The test: the modulus (the EM's — the deformation's), the limit (the pL's — the bearing's), and the design (the direct — the foundations'; the French's). The soil's — the in-place measured.
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How PMT works
The probe (the tri-cell's — the Menard's; the inflated), the pressure-volume (the curve's — the phases'; the pseudo-elastic's — the plastic's), the modulus (the EM's — the slope's; the deformation's), and the limit (the pL's — the doubled volume's; the bearing's).
The parameters
The EM (the Menard's — the modulus; the settlement's), the pL (the limit — the bearing's; the net's), the p0 (the at-rest — the horizontal's; the K0's), and the correlations (the Su's — the clays'; the phi's — the sands').
Applications
The shallow (the bearing's — the direct; the French's — the method), the deep (the piles' — the side's; the pressure's), the retaining (the modulus' — the walls'; the deformation's), and the calibration (the lab's — the compared; the SPT's — the correlated). The PMT is the direct — the in-situ designed.
The bottom line
Use pressuremeter tests (Menard PMT) to measure in-situ modulus (EM) and limit pressure (pL) for direct foundation bearing/settlement design — especially in French practice and for retaining wall deformation.
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