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F observed by high-resolution synchrotron and neutron diffractionShimono, Seiya*; Ishibashi, Hiroki*; Nagayoshi, Yusuke*; Ikeno, Hidekazu*; Kawaguchi, Shogo*; Hagihara, Masato; Torii, Shuki*; Kamiyama, Takashi*; Ichihashi, Katsuya*; Nishihara, Sadafumi*; et al.
Journal of Physics and Chemistry of Solids, 163, p.110568_1 - 110568_7, 2022/04
Times Cited Count：1 Percentile：15.7(Chemistry, Multidisciplinary)Tani, Takuya*; Shimono, Masato*; Iwano, Masahiro*; Yamamoto, Takuya*; Yamazaki, Masanao; Sanada, Hiroyuki
Dai-12-Kai Iwa No Rikigaku Kokunai Shimpojiumu Koen Rombunshu (CD-ROM), p.319 - 324, 2008/09
During the construction of the Horonobe URL shaft, some measurements have been carried out to verify the design and construction method in sedimentary soft-rock. The results obtained from the in-situ measurements at the G.L.-121 m show the unique behavior of surrounding rock masses. This paper reports the result of the numerical simulation of the behavior around the shaft excavation by short step-method. In the analysis using axisymmetric elastic FEM model, construction procedure including the high stiffness lining concrete is accurately followed and the deformation behavior around the shaft is well simulated. Consequently it is found that the excavation release ratio in the short step excavation method is different from one in the typical NATM tunnel excavation.
Noda, Masaru*; Toida, Masaru*; Nobuto, Jun*; Shimono, Masato*
JNC TJ7400 2004-016, 871 Pages, 2004/02
JNC-TJ7400-2004-016.pdf:74.68MB
In the Mizunami Underground Research Laboratory of Japan Nuclear Cycle Development Institute (hereafter, JNC) Mizunami Underground Research Laboratory plan of the geoscientific research which becomes basic of the research on the geological disposal of the high activity waste is advanced. This study is conducted for engineering technologies in the MIU design and construction technologies for the research drift and development of excavation and construction measures technologies, considering whole research program in the future and whole schedule. The engineering technology here consists of two researches which are on the research on the design and the construction technology under the large depth geological environment and which becomes basic of the geological disposal technology develoment. Research items are followings; Study on the technologies for feeding back measurement results to the design and the construction scheme, study on the technologies for inspection and assurance of the qualities of research and construction, study on construction technologies to measure the unexpected water inflow during excavation, study on the influence of earthquakes on underground research facilities, application study of the risk management method to the excavation phase of the research drift.
Shimono, Masato*; Motoshima, Takayuki*; Ijiri, Yuji*; Otsu, Hiroyasu*; Sakai, Ryosuke*; Sakai, Kazuo*; Sato, Toshinori; Mikake, Shinichiro
no journal, ,
It is considered that the uncertainty of construction cost due to geological heterogeneity is quite large. Therefore, it is crucial to make a long-term consistent budget plan for a construction period of tens years and to have engineering strategies for reducing a total budget. In this study, a risk management approach for construction in a heterogeneous fractured rock is developed. In this approach, methodologies of calculating construction costs for excavating drifts and taking countermeasures at high-hydrostatic pressured fracture zones in a heterogeneous rock are established. The cost for excavating drift is calculated from the heterogeneity of rock strength estimated from a geostatistical modeling approach. The cost for taking countermeasures is calculated from the heterogeneity of large fracture zone estimated from a probabilistic discrete fracture network modeling approach. In addition, a risk for a construction is assessed by a risk cost curve commonly used in the financial business.
