Faculty Profiles - KOMATSU Mitsuru

Papers - KOMATSU Mitsuru

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A new Method to Estimate the Permeability of Soil with Considering Particle Size Distribution and Compaction Rate Reviewed

MORITA Yukio, TSUBOTA Kuniharu, NISHIGAKI Makoto, KOMATSU Mitsuru

53 ( 7 ) 5 - 7 2005.7

Language：Japanese Publishing type：Research paper (scientific journal)

For a long time, the permeability of soil is estimated from particle size distribution using D_<10> and D_<20> values. Still, there are some problems associated with this method. In this paper, a new method for estimating the permeability of soil is proposed. This is based on particle size distribution and compaction rate data that were obtained from laboratory tests. Under practical field conditions, the estimation of either porosity or void ratio is difficult. Therefore, from the N values, the compaction rate is estimated. Though the permeability values obtained from the new method are smaller than those obtained from other methods, the new method is fairly reliable.

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Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10444150

SIMPLE METHOD FOR PREDICTING CHANGES OF GROUNDWATER DISTRIBUTION CAUSED BY A CONSTRUCTION OF A MOUNTAIN TUNNEL DIGGING AND ITS APPLICABILITY Reviewed

NISHIGAKI Makoto, KOMATSU Mitsuru, IRIE Akira, YONO Koichiro, OTA Takuro

Doboku Gakkai Ronbunshu 2004 ( 778 ) 125 - 137 2004.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

In order to predict the range of groundwater level fluctuation and the flow rate of spring water in a tunnel, which are caused by digging a mountain tunnel, some simple methods were proposed.<br>In this paper, the preconditions of these conventional simple methods are clarified. And new simple method, which can treat rainfall intensity and a coefficient of permeability that are not handled in these methods, is proposed by analyzing the results of a vertical-section-2-dimensional-finite-element-method. Moreover, based on results of new methods, the new method to set a range, which should be investigated and modeled for numerical analysis before excavation, is proposed.

DOI： 10.2208/jscej.2004.778_125

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THE STUDY ON BENTONITE SLURRY GROUT WITH ETHANOL FOR FRACTURED ROCK Reviewed

NISHIGAKI Makoto, KOMATSU Mitsuru, MIKAKE Shin-ichiro, TAOKA Hiroshi, NAKASHIMA Tomohiro

Doboku Gakkai Ronbunshu 2004 ( 764 ) 221 - 233 2004.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

The purpose of this paper is to propose the grouting material and method for fractured rock masses. So experimental study is executed in order to grasp that the properties of grouting material is stable and impermeable. In this study, experiments of hydraulic test and grouting injection test are performed on bentonite slurry mixes in the laboratory. From the results of the tests, a mixer of ethanol and bentonite is found to be very suitable for a grouting material. Also, dynamic grouting method is able to inject the concentrated bentonite slurry in the fractured aperture.

DOI： 10.2208/jscej.2004.764_221

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A basic study on monitoring method of contamination of soil and groundwater by using Frequency Domain Reflectometry method Reviewed

NISHIGAKI Makoto, KOMATSU Mitsuru, KIM Man-il

Journal of groundwater hydrology 46 ( 2 ) 145 - 157 2004.5

Visit to Valuable water springs (65) Valuable waters in Tarim basin, Xinjiang, western part of China

SHIMANO Yasuo, NISHIGAKI Makoto, KOMATSU Mitsuru, SUN Yao

Journal of groundwater hydrology 46 ( 2 ) 159 - 174 2004.5

Underground dam technology in some parts of the world Reviewed

西垣誠, K.Kankam-Yeboah, 小松満

46 ( 2 ) 113 - 130 2004.5

Field monitoring of hydraulic response of a residual soil slope to rainfall

A.Tohari, M.Nishigaki, M.Komatsu, K.Kankam-Yeboah, S.Daimaru

Lacerda, Ehrlich, Pont0ura & Sayao (eds):Landslides: Evaluation and Stabilization, Balkema 749 - 754 2004

Proposed New Equation for Estimating the Permeability of Soil Cosidering Particle Size Distribution and Compaction

Morita Yukio, Tsubota Kuniharu, Nishigaki Makoto, Komatsu Mitsuru

Proceedings of the Japan National Conference on Geotechnical Engineering 39 1159 - 1160 2004

A study on the development of a preventive method for reducing the effects of liquefaction during earthquake by creating unsaturated sandy ground

Yoshioka Seiji, Nishigaki Makoto, Komatsu Mitsuru, Ouchi Masatoshi, Onodera Takayoshi, Fujii Nao

Proceedings of the Japan National Conference on Geotechnical Engineering 39 1235 - 1236 2004

Density dependent transport analysis saturated-unsaturated porous media Eulerian Lagrangian method considered salinity change for consolidation phenomenon

otaki ikumi, nishigaki makoto, komatsu mitsuru, imai toshikazu

Proceedings of the Japan National Conference on Geotechnical Engineering 39 1187 - 1188 2004

Study on grouting against crack rock using bentonite

nakashima tomohiro, nishigaki makoto, komatsu mitsuru

Proceedings of the Japan National Conference on Geotechnical Engineering 39 1211 - 1212 2004

誘電率計測法による地盤の汚染度及び有効間隙率の測定方法に関する研究 Reviewed

西垣誠, 小松満, 金萬鎰

環境制御 25 ( 25 ) 19 - 24 2003.3

An experimental approach for estimating the porosity and effective porosity of porous media by permittivity methods

Nishigaki, M, M. komatsu, M. Kim

Proceedings of International Symposium on the Fusion Technology of Geosystem Engineering, Rock Engineering and Geophysical Exploration, Soul, Korea 2003

The State of MTBE Contamination in Japan

Makoto Nishigaki, Mitsuru Komatsu, Kwabena KANKAM-YEBOAH, Kim Man-il

1ST European Conference on MTBE at Dresden University of Technology 2003

Study on infiltration behavior of in-situ method for measuring coefficient of permeability of the bentonite composite soil

Ebara Tomoko, Nishigaki Makoto, Komatsu Mitsuru

Proceedings of the Japan National Conference on Geotechnical Engineering 38 1175 - 1176 2003

Study on measuring method of the effective porosity of a porous media by using Dielectric Method

Komatsu Mitsuru, Nishigaki Makoto, Kim Man-il

Proceedings of the Japan National Conference on Geotechnical Engineering 38 1171 - 1172 2003

the study on the standard characteristics of ethanol-bentonite slurry

Nakashima Tomohiro, Nishigaki Makoto, Komatsu Mitsuru, Mikake Sinitirou, Taoka Hiroshi

Proceedings of the Japan National Conference on Geotechnical Engineering 38 1173 - 1174 2003

地下水・土壌汚染の予測・評価技術

西垣誠, 小松満, 菱谷智幸

環境技術 31 ( 10 ) 766 - 769 2002.10

Study on the Properties of Seepage Flow and Injection in the Grouting for Fractured Rock Masses. Reviewed

NISHIGAKI Makoto, KOMATSU Mitsuru, YAMAMOTO Hiroshi, MIKAKE Shin-ichiro

Doboku Gakkai Ronbunshu No.715 ( III-60 ) 311 - 321 2002.9

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

The purpose of this study is to improve the grouting method for fractured rock masses. So experimental study is executed in order to understand the properties of grouting injection and seepage flow in hydraulic fractured aperture. This paper grasps the effect of the properties of grouting stage due to the various conditions such as width of the aperture, viscosity of the grout, water cement ratio and injection flow rate using flat plate fractured model in a laboratory experiment. From the results, it is proposed to select the relationship between the most suitable grout mix (water cement ratio) and width of the aperture to be injected according to the properties of grouting stage.

DOI： 10.2208/jscej.2002.715_311

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Study on in-situ measuring system of subsurface contamination using Frequency Domein Reflectometry Reviewed

Komatsu M, M.Nishigaki

Environmental Geotechnics(4th ICEG), de Mello & Almeida (eds) 521 - 526 2002.3

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