Thank you for your reply, Bogard.
I ploted the strain and load and recaculated the axial stiffness AE. It was linear 5m below the surface , but at shallow depths(e.g. 1m, 3m),the graph are parallel to the deep ones at first,then almost become horizontal , and slope again.
could I paste the...
Thank you very much, GeoPaveTraffic
Still I have a doubt if the concrete near the surface was shattered, So that's why the strain increased so rapidly.
Es=(E1*A1+E2*A2)/(A1+A2) E1-Steel Es E2-Concrete Es
A1,A2 their area in pile section
I used this formula to...
The top strain gauge was at 1m below the surface.
The strain gauges were installed in the steel bars,which were welded inside the reinforcement cage
The procedure of piling: first_ boring then_grouting last_inserting the reinforcement cage
No Extra care, after droping the cage, we just move...
Hi
Several days ago I did a tension pile test. The max tension load was 110t, which was twice the design load.Steel strain Gauges were installed in different depth of the pile.(1m,3m,6m,11 metre...) The pileside friction between 1m and 3m could be calculated with the margin of two tension...
