Publication Abstract

Proceedings of the Deep Mixing 2015 Conference, (DFI)

Practice to Reduce Ground Displacement in Deep Mixing Work
Arashi Shimano, Sanshin Corporation, Jersey; Kozo Takeda, Sanshin Corporation, Japan

Dry Jet Mixing (DJM) technique is widely known as soil mitigation technique with small ground displacement during installation comparing with other techniques. Some projects involving sensitive structures, however, require smaller impact than in conventional technique. In order to reduce ground displacement during DJM installation, this paper introduces systematic mixing technique, RD-DJM (Reducing Displacement Dry Jet Mixing). RD-DJM is characterized by injection nozzle on the rim of mixing blade and fin plate on mixing shaft. These devices contribute efficient collection of injected air toward mixing shaft and result in reduction of ground displacement. The authors demonstrate successful performance of RD-DJM indicating difference between conventional installation and RD-DJM technique.

 article #2115; publication #1013 (DM-2015)