日本語フィールド
著者：Mitsuse, K., Usui, H., Hino, T. and Some, D. D.題名：A consideration of risk management methods for quality defects in soil improvement with slurry binder発表情報：Proceeding of the 21st Southeast Asian Geotechnical Conference and 4th AGSSEA Conference (SEAGC-AGSSEA 2023)キーワード：Soft ground, Sensitivity, Compressibility, Organic matter, Slurry binder概要：抄録：The use of cement-based slurry binder has become mainstream in soil improvement, conducted as a countermeasure for soft ground in lowland areas of Saga Prefecture. However, the quality of the improved soil is often unsatisfactory. For this kind of undesirable result, we are addressing the difficulty of mixing soil present on the field and cement-based slurry binder. In this study, soil investigation results obtained in December 2021 for Fukudomi Kashima Highway were used for determining the risk of quality defects about mixing soil present on the field and cement-based slurry binder from the viewpoint of the sensitivity and compressibility of the soil. We defined a soil with low sensitivities, low compressibility, and organic matter as one that is risky for road construction. We localized the risky zone by highlighting the locations with the elements in colors. The darker the caution color, the more it indicated that the mixing of the soil present on the field and the cement-based slurry binder become risky. The road was divided into five sections based on the depositional environment, In this study, we investigated the level of agitation and the challenges associated with the mixing process, as well as the specific characteristics exhibited by soils in each area. The warning level was higher for soil that contained organic matter or whose compressibility was low. Regarding the liquidity index (IL), which indicates the sensitivity of the soil, spots characterized by low sensitivity were distributed in a similar pattern at the same depths. No noteworthy trends in sensitivity were found. Because Section 5 is nearer to mountains than other sections, the soil parameters seem to vary markedly by location. In terms of sensitivity and compressibility, there is a high risk of quality defects occurring in soil improvement with cement-based slurry binder in Areas 2, 3, and 5.英語フィールド
Author：Mitsuse, K., Usui, H., Hino, T. and Some, D. D.Title：A consideration of risk management methods for quality defects in soil improvement with slurry binderAnnouncement information:Proceeding of the 21st Southeast Asian Geotechnical Conference and 4th AGSSEA Conference (SEAGC-AGSSEA 2023)Keyword：Soft ground, Sensitivity, Compressibility, Organic matter, Slurry binderAn abstract：The use of cement-based slurry binder has become mainstream in soil improvement, conducted as a countermeasure for soft ground in lowland areas of Saga Prefecture. However, the quality of the improved soil is often unsatisfactory. For this kind of undesirable result, we are addressing the difficulty of mixing soil present on the field and cement-based slurry binder. In this study, soil investigation results obtained in December 2021 for Fukudomi Kashima Highway were used for determining the risk of quality defects about mixing soil present on the field and cement-based slurry binder from the viewpoint of the sensitivity and compressibility of the soil. We defined a soil with low sensitivities, low compressibility, and organic matter as one that is risky for road construction. We localized the risky zone by highlighting the locations with the elements in colors. The darker the caution color, the more it indicated that the mixing of the soil present on the field and the cement-based slurry binder become risky. The road was divided into five sections based on the depositional environment, In this study, we investigated the level of agitation and the challenges associated with the mixing process, as well as the specific characteristics exhibited by soils in each area. The warning level was higher for soil that contained organic matter or whose compressibility was low. Regarding the liquidity index (IL), which indicates the sensitivity of the soil, spots characterized by low sensitivity were distributed in a similar pattern at the same depths. No noteworthy trends in sensitivity were found. Because Section 5 is nearer to mountains than other sections, the soil parameters seem to vary markedly by location. In terms of sensitivity and compressibility, there is a high risk of quality defects occurring in soil improvement with cement-based slurry binder in Areas 2, 3, and 5.