ABSTRACT

A microcomputer program PRESRED exists to perform data reduction and plotting automatically. The raw data collected during the test consists of the pressure read on the gauge of the control unit and the volume read on the volume measuring device of the control unit. This raw data must be corrected to obtain the corrected pressure acting against the wall of the soil cavity and the increase in volume of the probe. The corrections include the corrections for membrane resistance, for hydrostatic pressure, for initial reading, for system compressibility. The chapter illustrates how to obtain the stress-strain curve from the pressuremeter curve. The quality of the test can be judged by inspecting the pressuremeter curve. The chapter shows the results of a test performed in a hole which is too large. It also provides a comparison of results between the Texam and the Menard pressuremeters at a clay site.