It has been about twenty years since the soil nailing, a method that had been developed for reinforcing soil, was first used in expressway construction in Japan. Since then, this method has been subjected to laboratory tests, field tests and experimental work. In 1998 the Japan Highway Public Corporation established the application standard of the method on the basis of the results of these studies, in "Designing and Construction Procedure for the Soil Nailing Method". This paper discusses the actual status of the application of the method, focusing upon the safety management of the cut slope, results of long-term stability investigation and the essential points of the said Procedure, as well as the recent studies.
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