Evaluation of Discharging Surplus Soils for Relative Stirred Deep Mixing Methods by MPS-CAE Analysis

Koki Nakao, Shinya Inazumi, Toshiaki Takaue, Shigeaki Tanaka and Takayuki Shinoi
Additional contact information
Koki Nakao: Graduate School of Engineering and Science, Shibaura Institute of Technology Toyosu Campus, Tokyo 135-8548, Japan
Shinya Inazumi: Department of Civil Engineering, Shibaura Institute of Technology Toyosu Campus, Tokyo 135-8548, Japan
Toshiaki Takaue: Aoyama Kiko Co., Ltd., 2-18-4 Kita-ueno, Taito-ku, Tokyo 110-0014, Japan
Shigeaki Tanaka: Ibuki Industry Co., Ltd., 1-17-5 Higashi-Nakashima, Yodogawa-ku, Osaka 533-0033, Japan
Takayuki Shinoi: Nihon Kaiko Co., Ltd., 119 Ito-cho, Chuo-ku, Kobe 650-0032, Japan

Sustainability, 2021, vol. 14, issue 1, 1-17

Abstract: Most of the ground in Japan is soft, leading to great damage in the event of liquefaction. Various ground-improvement measures are being taken to suppress such damage. However, it is difficult to carry out ground-improvement work while checking the internal conditions of the ground during the construction. Therefore, a visible and measurable evaluation of the performance of the ground-improvement work was conducted in this study. The authors performed a simulation analysis of the relative stirred deep mixing method (RS-DMM), a kind of ground-improvement method, using a computer-aided engineering (CAE) analysis based on particle-based methods (PBMs). In the RS-DMM, the “displacement reduction type (DRT)” suppresses displacement during construction. Both the DRT and the normal type (NT) were simulated, and a visible and measurable evaluation was performed on the internal conditions during each construction, the quality of the improved body, and the displacement reduction performance. As an example of these results, it was possible to visually evaluate the discharge of surplus soil by the spiral rod attached to the stirring wing of the DRT. In addition, the authors succeeded in quantitatively showing that more surplus soil was discharged when the stirring wing of the DRT was used than when the stirring wing of the NT was used.

Keywords: excavation and stirring; ground improvement; MPS-CAE analysis; relative stirred deep mixing method; visualization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/1/58/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/1/58/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2021:i:1:p:58-:d:708135

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().