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PERFORMANCE OF VIBRATING WIRE PIEZOMETERS IN VERY LOW PERMEABLE CLAY (2018)
This paper presents results from installations comprising both HAE and LAE filters in fully grouted boreholes and in intimate contact with the ground. It stands out distinctly that high air-entry filters have a high risk of malfunctioning if placed in fully grouted boreholes with no possibility of flushing the filters. Low air-entry filters should be the preferred choice of filter for non-flushable diaphragm piezometers in fully grouted boreholes.
International Symposium on field measurements in Geomechanics (FMGM 2018)
Geo and Aarhus University, Aarhus, Denmark