Japan has more than 20 years experience in soil covering method for the conquest of extremely soft ground through artificial reclamation using geosynthetics. During these years, various field works of soil covering methods were executed successfully and the relationship between tensile strength of geosynthetics and soil strength of ground is presented. If soil improvement work and reclamation work are done simultaneously, the construction period could be reduced and it b omes more economical. The horizontal drain method has been developed for this concept. This paper reports field, work results of these two successful methods for extremely soft ground.
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