Undrained Plane-Strain Expansion of a Cylindrical Cavity in Clay: A Simple Interpretation of the Pressuremeter Test,

摘要

A study is made of the problem of interpreting the results of Menard pressuremeter tests on soil in situ. In the test a cylindrical cavity is expanded by internal pressure,and the relation between applied pressure and cavity volume change is measured. It is shown that the results of a single test are enough to determine a complete stress-strain relation in plane strain,and a simple graphical procedure for doing this is derived. The only restrictive assumption necessary is that the deformation is under undrained conditions;there is no restriction to infinitesimal strain or to elastic perfectly-plastic soils. (Author)