The ground conditions of construction site became worse than ever due to the over-population in the urban areas throughout the world. Good quality material for the construction is becoming a precious resources to be left for the next generation. Due to these reasons and environmental restrictions on the public works, ground improvement is becoming a necessary part of the infrastructure development projects both in the developed and developing countries in the past decade. The basic principles of ground improvement were unchanged since the beginning of the history of mankind. The practices, however, are changing with time due to the development of new materials, new machinery, new technologies such as computer, soft ware and sophisticated instrumentation. The application is diversified due to the ever changing needs of practicing engineers. The present state of the art outlines the principles of ground improvement and focuses on the recent development of such traditional technologies as densification, consolidation/dewatering, and admixture stabilization.


Mitchell (1981) delivered an excellent State of the Art Report on Soil Improvement in Stockholm at the 10th International Conference on Soil Mechanics and Foundation Engineering. This must have been the first comprehensive state of the art paper included in a main session in an international conferences organized by the International Society. The Eighth European Regional Conference on Soil Mechanics and Foundation Engineering in 1983 held in Helsinki devoted all the sessions to cover a wide range of ground improvement. Later in 1997 in Hamburg at the 14th International Conference, one of the plenary session was allocated again for the ground improvement. Therefore, it is quite appropriate for the organizing committee of GeoEng 2000 to select Ground Improvement and Reinforcement as one of the major topics for up-dating the state of art on this subject since 1981.

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