The deflection in a foundation due
to settlement, relative to its length or breadth boundaries.In an axially symmetrical system (e.g. in a triaxial sample), the total or effective stress acting radially, perpendicular to the longitudinal axis.
Theoretically, pumping from a well produces a depression of water pressure or water table which extends to infinite radius. Practically, however, the depression of the water table can be regarded as negligible beyond a certain radius, known as the radius of influence. (For groundwater control purposes, if the required radius of influence is known, and the water table depression is also known, then the flow rate can be calculated as a function of borehole diameter and soil permeability.)
The deflection in a foundation due
to settlement, relative to its length or breadth boundaries.
The lowest strength of a clay soil; in the residual state flat particles have become aligned with the slip plane and the flow is laminar; occurs after a large amount of strain has taken place, e.g. as developed along natural landslip surfaces.
Strictly, the single force that will produce the same effect as several forces acting at a point; also, the force producing the same effect as a pressure or stress distributed over a given area. In earth pressure problems,
PA = resultant thrust due to active earth pressure
Named after Prof. K.H.Roscoe, that
part of the state boundary surface between the
normal compression line and the critical state line, i.e. on the wet side of
critical.