Proceedings of the Deep Mixing 2015 Conference, (DFI)
Outline and Application Example of Deep Mixing Meeting High Quality and High Efficiency-Execution
Shoji Morihana, Fudo Tetra, Japan; Kenji Harada, Fudo Tetra, Japan; Akihiko Suzuki, Fudo Tetra, Japan; Shigeo Tanabe, Fudo Tetra, Japan; Hidekatsu Takeuchi, Fudo Tetra, Japan; Masaru Sakakibara, Fudo Construction Inc., United States
Deep mixing (DM) method, one of the most commonly used solidification methods, is based on the principle of solidifying soft ground. It can be classified into two categories such as Cement Deep Mixing (CDM) method and Dry Jet Mixing (DJM) method which apply hardening agent in slurry condition and in powdery condition respectively. In recent years, DM methods have undergone changes that have evolved them from the traditional method to meet the needs of the diversifying market. Among them, the Contrivance-Innovation Clay Mixing Consolidation (CI-CMC) method is a DM method which mixes a cement-type hardening agent in slurry condition mechanically with soils in situ and incorporates the innovative technique, “atomized ejection” that has been developed to allow faster installation of larger diameter columns without sacrificing quality compared with conventional methods. At this technique, the atomized hardening agent is discharged together with compressed air through a device incorporated into the mixing blade. It also has advantages of performing the works with low-displacement of the surrounding soils in consideration of environmental friendliness and with higher penetration capability against hard ground. This paper presents the technological outline of the above-mentioned CI-CMC method, focusing on the atomized-ejection technique, followed by some construction examples, applied to the self-earth-retaining wall, to the hard ground and the area adjacent to the existing structures.
|article #2114; publication #1013 (DM-2015)|