EFFECT OF SOIL DENSIFICATION APPLYING THE GRAVEL DRAIN SYSTEM WITH A COMPACTION ROD

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  • 突棒を用いた砕石ドレーン工法における周辺地盤の締固め効果

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The gravel drain system aims to avert liquefaction by quickly dissipating excess pore pressure. Since construction of gravel drains produces no serious vibration and noise, it is suitable to sites in urban areas and adjacent to existing structures. We have developed a compaction-rod type machine. One of the important characteristics of this machine is the compaction effect of the surrounding ground. To take advantage of the compaction effect, we undertook full scale model tests and verification field tests in which the increase in the strength of the surrounding ground was tested. In this paper, the compaction effect of the surrounding soil imparted by a specially designed compaction rod is shown by the test results.

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