EVALUATION OF THE STRENGTH AND DEFORMATION CHARACTERISTICS OF CEMENT-MIXED GROUND PRODUCED BY HIGH-PRESSURE INJECTION MIXING

Abstract

 The high-pressure injection mixing method is extensively used to improve the ground for higher seismic stability, including the prevention works of soil liquefaction. To design these cement-improved grounds to support permanent structures, evaluation of the strength and deformation characteristics that is much more precise and reliable than the conventional method is required unlike cases of temporary structures. To this end, a methods to accurately evaluate the stiffness at a very small strain, the strain-dependency of stiffness, the confining pressure-dependency of strength and the effects of long ageing period on the strength and stiffness of cement-mixed clayey, sandy and gravelly soils were studied.