Thanks for the feedback. Initially i thought it might be either temperature effects or a bad cone. However, I am pretty sure it is not a temperature effect as the negative readings have appeared on first pushes of the day and even after several successive pushes. I have even placed the cone...
During different CPTu projects over the last few years I have been observing negative readings of sleeve friction in very soft silt (85% silt size particles). The cone is calibrated and performs fine in firmer material. The negative skin friction values measured are about 1 to 3% of the full...
I am looking for info on the effect of soil types on pore water pressure measurments during piezocone tests. Did not see any previous threads on this. Any info regarding buildup of pressure at beginning of test or negative pressure is greatly appreciated. Thanks.
