Abstract
The long-term use of wood is a means of mitigating global warming and rejuvenating forestry. Accordingly, the authors have been developing a liquefaction countermeasure that uses logs. To investigate the effect of this method against liquefaction, a large-scale shaking table test was previously conducted. Results of that experiment indicated that the log piling liquefaction countermeasure is more effective than soil densification, likely because of densification between piled logs and increase of horizontal earth pressure. In regard to this experiment, the present paper discusses the stress-strain relation and effective stress path, and considers the results of sounding tests at the ground between piled logs, comparing them with the shaking table tests and the results of element tests. The results confirm that the log piling liquefaction countermeasure is two times more effective than soil densification in the rage of relative density more than 60 %.
