doi:10.3850/GI138


Effect of Carbon Storage Due to Ground Improvement by Log Piling


Atsunori Numata1, Masanori Hamada2, Masaho Yoshida3, Mario Tonosaki4, Hiroaki Nakamura5 and Hikaru Kubo6

1Research Institute of Technology, Tobishima Corporation, 5472 Kimagasse, Noda-shi, Chiba 270-0222, Japan.

atsunori_numata@tobishima.co.jp

2Department of Civil and Environmental Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.

hamada@waseda.jp

3Department of Civil Engineering, Fukui National College of Technology, Geshi-cho, Sabae-shi, Fukui 916-8507, Japan.

masaho@fukui-nct.ac.jp

4Department of Wood Properties, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba-shi, Ibaraki 305-8687, Japan.

tonosaki@ffpri.affrc.go.jp

5Area-Environmental Laboratory Corporation, 3-4-2 Nishi-Aoki, Kawaguchi-shi, Saitama 332-0035, Japan.

naka-h@isis.ocn.ne.jp

6Snow Management & Construction Technology Research Center of Fukui, 3-303 Kasuga, Fukui-shi, Fukui 918-8108, Japan.

h-kubo-1v@pref.fukui.lg.jp

ABSTRACT

Global warming is one of the most serious environmental issues in the world and the present situation indicates almost no effective ways in resolving the problem. In fact, efforts from all fields of specialization are essential to counter the problem effectively. In the field of civil engineering, ways to reduce the emission and concentration of carbon dioxide (CO2) in the atmosphere due to construction activities have to be developed. In this context, wood as a carbon neutral material should be reconsidered as a major construction material. To counter global warming, extending the service period and increasing the usage of wood will be a highly effective measure. For this reason, the authors propose ground improvement by piling log into the soft ground as a way to utilize wood for countering global warming. Field tests were conducted to verify the feasibility of this ground improvement method and its contribution towards reducing CO2 concentration in the atmosphere. In this paper, the significance of using wood, outline of field tests, procedures for measuring emission of CO2 and results of comparison between CO2 emission and storage of carbon are discussed.

Keywords: Global warming; wood; ground improvement.


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