In Conventional consolidation tests,an applied consolidation pressure is reduced by the side friction set up between a specimen and a consolidation ring. The side friction was measured with specially deviced consolidometer. And the concept of side friction was extended to the partially consolidated state by combining the Taylor's analysis and the Terzaghi's approximate solution of consolidation.
　As the result of measurements and analyses of the side friction, it is concluded as follows ;
(a) The coefficient of side friction in conventional consolidation tests is between 0.30 and 0.15 according to the consolidation pressure at completion of 24 hours loading.
(b) The mean effective consolidation pressure in the commonly used size of specimen is about 75 to 90 % of an applied pressure at completion of 24 hours loading.
(c) The existence of side friction does not affect the mv vs p and k vs p relationships in such a representation as specified in the JIS A 1217, in which logarithms of the coefficients are to be plotted against logarithms of mean consolidation pressure.
(d) Within a single process odf consolidation, the coefficient of side friction decreases with increasing degree of consolidation.