The papers in this volume are primarily concerned with the theory, design and practice of artificial ground freezing (AGF) and with frost heave, frost penetration and thermal degradationof frozen layers in seasonal frost areas. It contains papers on the following topics: Heat and mass transfer; Frost susceptibility and frost heave; Mechanical properties; Environmental soil freezing; Engineering design and Case histories. It also contains reports from working groups within the ISSMFE technical committees on Frost (TC8) and on Ground Freezing (TC23).