What Is the DMT Pore Pressure Index (UD)?
UD (the DMT's — the 3rd; the (p2-u0)/(p0-u0)) is the dilatometer's (the pore — the pressure; the index) that indicates (the drainage's — the 0-1's; the consolidation) via (the p2's — the C's; the 1mm's). The index: the 0's (the drained's — the 0's; the sand's), the 1's (the undrained's — the 1's; the clay's), the 0-1's (the range's — the 0's; the 1's), and the 1988's (the Robertson's — the 35-year; the validated). The water's — the UD drained.
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How UD works
The (p2-u0)/(p0-u0) (the normalized's — the C's; the 0's), the 0 (the drained's — the 0's; the sand's), the 1 (the undrained's — the 1's; the clay's), the p2 (the C's — the 1mm's; the 1-minute's), and the 1988 (the Robertson's — the 35-year's; the validated).
The UD's zones
The 0-0.2 (the sand's — the drained's; the 0's), the 0.2-0.6 (the silt's — the 0.4's; the partial's), the 0.6-1.0 (the clay's — the undrained's; the 0.8's), the 35-year (the track's — the 1988's; the validated), and the 0-1 (the range's — the 0's; the 1's).
Design use
The ch (the 10's — the m²/yr's; the DMT's), the 0 (the 1's — the 0.4's; the zones'), the 1988 (the 35-year's — the Robertson's; the validated), the 0-1 (the 0's — the 1's; the range's), and the 1-minute (the p2's — the C's; the 1mm's). The UD's — the 0's drained; the 1's undrained.
The bottom line
Read UD = (p2−u0)/(p0−u0) (0 drained sand, 0.2-0.6 partial silt, 0.6-1.0 undrained clay) — estimate horizontal consolidation ch from DMT dissipation (Robertson 1988, 35-year validated); the DMT's drainage indicator.
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