Table 2.

Summary of test programme

SpecimenVoid ratioMeasured critical hydraulic gradient,
icr
Mean effective stress: kPaB-valueInternal erosionγtv
After consolidationAfter erosion
B500·600N/AN/A500·956No0·0031
B100N0·560N/AN/A1000·894No0·0031
B1000·582N/AN/A1000·958No0·0030
B100E0·582N/AN/A1000·956No0·0093
B2000·513N/AN/A2000·952No0·0028
IB50HB0·6001·1030·67500·959Yes0·0109
IB100HN0·5600·8320·441000·887Yes0·0052
IB100HB0·5820·8870·351000·955Yes0·0105
IB100HBE0·5820·8830·361000·957Yes0·0094
IB200HB0·5130·8120·432000·951Yes0·0102
Note:

icr denotes the critical hydraulic gradient, and γtv denotes the volumetric threshold shear strain.

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