Visualization innovation of structure and phenomena in the geo-materials leaded by non-destructive visualization method, X-ray CT method

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246156
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Earth system and resources enginnering
• Research Institution: Kumamoto University
• Principal Investigator: OBARA Yuzo 熊本大学, 自然科学研究科, 教授 (50135315)
• Co-Investigator(Kenkyū-buntansha): OTANI Jun 熊本大学, 大学院自然科学研究科, 教授 (30203821) ; MUKUNOKI Toshifumi 熊本大学, 大学院自然科学研究科, 准教授 (30423651) ; 佐藤 晃 熊本大学, 大学院自然科学研究科, 准教授 (40305008) ; YAMADA Fumihiko 熊本大学, 大学院自然科学研究科, 准教授 (60264280) ; ASAUE Hisafumi 熊本大学, 大学院自然科学研究科, 助教 (70462843)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: ジオマテリアル / Ｘ線ＣＴ / 可視化 / 非破壊試験

Outline of Final Research Achievements

In order to assess the super long term stability of underground caverns, it is inevitable to evaluate fracture toughness of rock masses. In this study, the relationship between loading rate and fracture toughness, and size effect of specimen size were evaluated. Through the observing the crack propagation process by X-ray CT method, dependency towards the grain arrangement was also revealed. The diffusion and advection of materials in the pores of geo-materials were visualized by X-ray CT method. The trap phenomena of materials in the pores evaluated and the quantitative analysis of the trapped materials has been also conducted. In order to solve the global worming problem, CCS is the key technique. Here, the existence of CO2 in the pores was clearly visualized by X-ray CT and the storage ratio of CO2 was quantitatively evaluated. The 2 phase flows between LNAPLE (oil) and water in the soils including fingering process were also visualized and analyzed by X-ray CT method.method.

Free Research Field

地下空間工学