Refine your search:     
Report No.
 - 
Search Results: Records 1-19 displayed on this page of 19
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Estimation of in situ stress based on the measurement of convergence during gallery excavation

Aoyagi, Kazuhei; Kamemura, Katsumi*; Sugawara, Kentaro*; Hagihara, Takeshi*

Dai-53-Kai Jiban Kogaku Kenkyu Happyokai Happyo Koenshu (DVD-ROM), p.11 - 12, 2018/07

no abstracts in English

Journal Articles

Development of in situ stress estimation method based on the measured convergence and geological observations

Kamemura, Katsumi*; Aoyagi, Kazuhei; Nago, Makito*; Sugawara, Kentaro*

Dai-45-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koenshu (CD-ROM), p.43 - 48, 2018/01

In situ stress state is very important for the design of deep underground facility of high-level radioactive waste disposal repository. This study establishes a practical and effective method for estimating in situ stress state based on the measured convergence and detailed geological observations during gallery excavation. The convergence was measured in various directions of the loop gallery at 350m depth of the Horonobe URL; this allows determination of the stress state corresponding to the rock mass behavior in 120m $$times$$ 200m area. In situ stress state estimated by the back analysis considering existing faults and fractures showed a good agreement with that of estimated from hydraulic fracturing method.

Journal Articles

Development of a back analysis method for the estimation of in situ stress based on the measured convergence in the Horonobe Underground Research Laboratory

Aoyagi, Kazuhei; Kamemura, Katsumi*; Nago, Makito*; Sugawara, Kentaro*; Matsubara, Makoto*

Proceedings of ITA-AITES World Tunnel Congress 2017 (WTC 2017) (USB Flash Drive), 10 Pages, 2017/06

An in situ stress state is one of the important factors in the design of deep underground facility of high-level radioactive waste disposal repository. This study establishes a practical and effective method for estimating in situ stress state on the basis of the measured convergence during gallery excavation. The convergence was measured in various directions of the loop gallery at 350m depth of the Horonobe Underground Research Laboratory; this allows determination of the stress state corresponding to the rock mass deformation behavior in an approximately 120 m* 200 m area. To estimate in situ stress state around that area, a back analysis method considering the existence of faults and fractures around the gallery was developed. The analyzed results showed a good agreement with the trend of in situ stress state estimated from hydraulic fracturing method.

Journal Articles

Estimation of rock mass stress state based on the convergence measurement result during tunnel excavation

Kamemura, Katsumi*; Aoyagi, Kazuhei; Nago, Makito*; Sugawara, Kentaro*; Matsubara, Makoto*

Dai-14-Kai Iwa No Rikigaku Kokunai Shimpojiumu Koen Rombunshu (Internet), 6 Pages, 2017/01

In the design of deep underground structures such as high-level radioactive waste disposal repositories, the estimation of rock mass stress state is important as well as the estimation of mechanical characteristics of rock mass. This study establishes a practical and effective method for estimating in situ stress based on the convergence measurement results obtained during gallery construction of URL. The convergence was measured in various directions of the URL loop gallery at 350 m depth, and this will allow determination of the stress state over a large area using a back analysis method. In order to improve the accuracy of initial stress estimation, the relationship between convergence measurement results and geological situation of existing fractures were studied. The analysis results show good agreement with the in situ stress state results reported in previous studies and confirm the applicability of the proposed method.

Journal Articles

Estimation of rock mass stress state based on convergence measurement during gallery excavation

Aoyagi, Kazuhei; Nago, Makito*; Kamemura, Katsumi*; Sugawara, Kentaro*

Proceedings of 9th Asian Rock Mechanics Symposium (ARMS-9) (USB Flash Drive), 10 Pages, 2016/10

Journal Articles

Estimation of initial stress based on the convergence measurement result during tunnel excavation

Kamemura, Katsumi*; Fujita, Tomo; Aoyagi, Kazuhei; Nago, Makito*; Shirase, Mitsuyasu*; Sugawara, Kentaro*

Dai-44-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koenshu (CD-ROM), p.109 - 114, 2016/01

How to estimate the initial stress state as well as a mechanical characteristic of rock mass is important in the design of deep underground structures. Some stress measurement methods using borehole, which methodology and evaluation method have been discussed in detail, are carried out if necessary. However, obtained results are often varying widely, so the evaluation of initial stress is difficult. Here, the initial stress state corresponding to the rock mass behavior of about 120m$$times$$200m area is evaluated using the convergence measurement results during tunnel excavation in 350m depth. Analysed result corresponded to that of other method, so the validity of the proposed method was shown.

Journal Articles

An Application of three-dimensional geological information system to underground construction

Kato, Nobuyoshi*; Tsusaka, Kimikazu; Nago, Makito*; Yamagami, Masahito*; Matsubara, Makoto*; Shigehiro, Michiko*; Aizawa, Takao*; Kamemura, Katsumi*

Chishitsu To Chosa, (139), p.17 - 22, 2014/04

no abstracts in English

Journal Articles

Relationship between rock mass properties and damage of a concrete lining during shaft sinking in the Horonobe Underground Research Laboratory Project

Tsusaka, Kimikazu; Inagaki, Daisuke; Nago, Makito*; Kamemura, Katsumi*; Matsubara, Makoto*; Shigehiro, Michiko*

Proceedings of ITA-AITES World Tunnel Congress 2013 (WTC 2013)/39th General Assembly, p.2014 - 2021, 2013/05

Japan Atomic Energy Agency (JAEA) has been constructing three shafts to a depth of 500 m in the Horonobe Underground Research Laboratory Project. In this study, in consideration of support patterns installed, a relationship between the rock mass properties and mechanical response to excavation was investigated in detail during the construction of the East Access Shaft below a depth of 250 m. Since the shaft has intersected several faults with the size greater than the shaft diameter, some amounts of rock spalling have occurred and cracks have severely developed in a concrete lining in highly fractured zones. The results of pre-excavation grouting were compared with the results of fracture mapping in the shaft wall obtained during the shaft sinking. Applicability of several support patterns installed to control massive spalling during the shaft sinking was also analysed using the results of geometry profiling of shaft wall using a three-dimensional laser scanner and convergence measurements. As a result, based the empirical relationships among the characteristics of rocks, dimension of spalling, damage of a concrete lining and support patterns, a flow chart for selection of span of a concrete lining was proposed to control its severe damage prior to shaft excavation.

Journal Articles

Risk management methodology for construction of underground structures

Matsui, Hiroya; Ijiri, Yuji*; Kamemura, Katsumi*

Proceedings of ITA-AITES World Tunnel Congress 2012 (WTC 2012)/38th General Assembly (CD-ROM), 8 Pages, 2012/05

JAEA has been conducting research and development at two underground research laboratory projects, in crystalline and sedimentary rock at Mizunami, Gifu and Horonobe, Hokkaido respectively. In this report, individual risk assessment methods are shown based on existing studies on general underground construction projects and complementary data and experience obtained from the Mizunami URL project. The results suggest that risk assessments on geological disposal projects can utilize this methodology to assess risk in establishing the site description model for design and safety assessment of a repository, as was done in Phase I of the Mizunami URL. Thus the proposed methodology should have broad application and additional special investigations for risk management are not likely needed.

JAEA Reports

None

Sugihara, Yutaka*; Kubota, Shigeru*; Yamamoto, Takuya*; Kamemura, Katsumi*; *; *

JNC TJ1400 2001-005, 383 Pages, 2003/03

JNC-TJ1400-2001-005.pdf:18.73MB

no abstracts in English

JAEA Reports

None

Sugihara, Yutaka*; Yamamoto, Takuya*; *; *; Kamemura, Katsumi*; *; *

JNC TJ1400 2001-002, 355 Pages, 2001/03

JNC-TJ1400-2001-002.pdf:15.83MB

Journal Articles

None

Sugihara, Kozo; Kamemura, Katsumi*; Ninomiya, Yasuo*

Doboku Gakkai Rombunshu, (589), p.239 - 251, 1998/03

None

JAEA Reports

A Study on the technique to measure and evaluate loosened zone due to tunnel excavation (II) - In-situ testing on the effect of shaft excavation -

Ito, K.*; Kamemura, Katsumi*; Homma, N.*; Mikami, Tetsuji*; Aoki, Kenji*; Ishi, S.*

PNC TJ4449 89-003VOL2, 122 Pages, 1989/03

PNC-TJ4449-89-003VOL2.pdf:12.56MB

None

JAEA Reports

A Study on the technique to measure and evaluate loosened zone due to tunnel excavation (II)

Ito, K.*; Kamemura, Katsumi*; Homma, N.*; Mikami, Tetsuji*; Aoki, Kenji*; Ishi, S.*

PNC TJ4449 89-003VOL1, 223 Pages, 1989/03

PNC-TJ4449-89-003VOL1.pdf:23.93MB

None

Oral presentation

Comparing the rock behaviors obtained from high-precision tiltmeters and from the elastic analysis of shaft excavation

Hatsuyama, Yoshihiro*; Ijiri, Yuji*; Nago, Makito*; Kamemura, Katsumi*; Sato, Masaru*; Sanoki, Satoru*; Kunimaru, Takanori

no journal, , 

The data obtained from high-precision tiltmeters installed at the Horonobe URL was compared with the result of three-dimensional elastic analysis of shaft excavation.

Oral presentation

Data analysis of high-precision tiltmeters installed around the Horonobe underground research laboratory

Ijiri, Yuji*; Hatsuyama, Yoshihiro*; Nago, Makito*; Kamemura, Katsumi*; Sato, Masaru*; Sanoki, Satoru*; Kunimaru, Takanori

no journal, , 

Both the short- and long-period noises were filtered out from the data of high-precision tiltmeters installed at the Horonobe URL. Then, the effect of shaft excavation on these data was investigated.

Oral presentation

Risk management methodology for construction of underground structures

Ijiri, Yuji*; Motoshima, Takayuki*; Kamemura, Katsumi*; Mikake, Shinichiro; Matsui, Hiroya; Sugihara, Kozo

no journal, , 

no abstracts in English

Oral presentation

The Project for grouting technology development for the high level radioactive waste repository, 8

Ijiri, Yuji*; Shindo, Akihisa*; Miura, Hitoshi*; Kamemura, Katsumi*; Tomoe, Naoto*; Nagai, Norihisa*; Abe, Akimasa*; Fujita, Tomo; Izumi, Atsushi

no journal, , 

no abstracts in English

Oral presentation

Social risk on a project with underground construction

Kamemura, Katsumi*; Matsui, Hiroya; Mikake, Shinichiro; Ijiri, Yuji*

no journal, , 

There is a different kinds of "Risk" in a project with underground construction. The risk related with geological environment, which is called "Georisk", has been discussed in these days. It is very important not only giving of the technical information but also active communication with a stakeholder such as local people to get the agreements. Therefore, it is significant to response a social risk fitly. In this study, a response of social risk which is difficult to avoid in new type of project on underground construction, such as the water treatment problem in MIU (Mizunami underground research laboratory project), was analyzed based on the published information (HP, newspaper etc.) as a example.

19 (Records 1-19 displayed on this page)
  • 1