Journal of the Japanese Society of Soil Physics

Journal of the Japanese Society of Soil Physics

Online ISSN : 2435-2497
Print ISSN : 0387-6012

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Volume 143

Displaying 1-15 of 15 articles from this issue

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[title in Japanese]

[in Japanese]

2019 Volume 143 Pages 1-3
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_1

JOURNAL FREE ACCESS

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Present situation of research on permafrost in Arctic region: View point of terrestrial environmental changes

Yoshihiro IIJIMA

2019 Volume 143 Pages 5-16
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_5

JOURNAL OPEN ACCESS

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The application of the ground freezing method for replacing the wall surface of a strip-shaped steel reinforced earth wall

Yurie OSADA, Hiroshi SOMA, Shinya AOKI, Kunio WATANABE

2019 Volume 143 Pages 17-23
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_17

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Strip-shaped steel (Strip) reinforced earth walls have been in use for more than 45 years．As a measure against aging or disaster, maintenances of reinforced earth walls will be required in the near future. Conventional chemical grouting has been used for stabilizing soil behind a wall when replacing the wall surface during maintenance. However, the injected chemical grout may affect the permeability of the drainage layer behind the wall surface. Therefore, the ground freezing method, which enables the reinforcement of the ground without grout materials, has gained attention. However, the ground freezing method is ordinarily applied to saturated soil. Therefore, the applicability of this method to unsaturated soil such as Strip reinforced soil was examined. CO2 was used as a refrigerant for the cooling system, and the working space was reduced. In the full-scale experiment, 6 freezing pipes with 60.5 mm in diameter were installed at 0.6 m intervals behind the wall in a 10.8 m×2.4 m artificial fill. After 4 days freezing, the surface of the reinforced earth wall was replaced successfully without the soil collapsing. From the results of the laboratory experiment and comparisons to a model for saturated soil, it was found that, when the saturated soil water content is 0.4 m3 m-3, the unsaturated water content ranged from 0.2 to 0.3 m3 m-3 is required in order that the freezing rate of the unsaturated soil should be equivalent to the one of the saturated soil. Further investigation, such as the influence of water content and water flow on freezing expansion and construction technique at the time of wall surface replacement, will be needed to establish this technique.

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Invitation to review classical studies

Shuichi HASEGAWA

2019 Volume 143 Pages 25-28
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_25

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Soil and Sustainable Development Goals (SDGs) — Soil in Africa, Urban Soil —

Masami NANZYO, Kazuyuki INUBUSHI, Yoko YAMAMOTO

2019 Volume 143 Pages 29-32
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_29

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[title in Japanese]

Yasuhisa ADACHI

2019 Volume 143 Pages 33-34
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_33

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[title in Japanese]

Yuki KOJIMA

2019 Volume 143 Pages 35
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_35

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[title in Japanese]

Yuki KOJIMA, Shoichiro HAMAMOTO, Hirotaka SAITO, Yasushi MORI

2019 Volume 143 Pages 37-38
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_37

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[title in Japanese]

Yasushi MORI

2019 Volume 143 Pages 39-40
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_39

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[title in Japanese]

Kousuke NOBORIO, Masaru MIZOGUCHI

2019 Volume 143 Pages 41-43
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_41

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[title in Japanese]

Masahiro KOBAYASHI, Seiko YOSHIKAWA

2019 Volume 143 Pages 45-47
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_45

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[title in Japanese]

Masaru MIZOGUCHI, Kousuke NOBORIO

2019 Volume 143 Pages 49-50
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_49

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[title in Japanese]

Yohey HASHIMOTO

2019 Volume 143 Pages 51
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_51

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Report on the study at Bayreuth University in Germany

Atsushi YAMAGUCHI

2019 Volume 143 Pages 53-56
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_53

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[title in Japanese]

Koutaro FUKADA

2019 Volume 143 Pages 63
Published: 2019
Released on J-STAGE: June 17, 2020

DOIhttps://doi.org/10.34467/jssoilphysics.143.0_63

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