Location
San Diego, California
Presentation Date
27 May 2010, 4:30 pm - 6:20 pm
Abstract
Global warming is one of the most serious problems which faced by civil engineers in this century. Because a wood can store carbon within itself, the utilization of wood in the construction projects may contribute to the mitigation of global warming. The technique of ground improvement by installing logs into loose sand layer as a countermeasure against soil liquefaction was proposed in this study. The logs had been used as pile foundation until 1950's in Japan. However, as the wood has high possibility of a decrease in strength by decay, the utilization of wood become minority in the construction projects. First, since a lot of former wooden piles were found at the riverbed of the Asuwa River in Japan in 2005, the soundness of wood was evaluated. From the test results, it was confirmed that the level of decay was extremely low and the compression strength exceeded the allowable stress of wood pile, though they were buried under the riverbed for 59 years. Second, small scale shaking table tests in a 1-g gravity field were carried out using a composite ground which was made of loose saturated sand layer and the improved ground by piling with logs. It was clarified that the logs installed in liquefiable soil layer could increase the resistance of ground against liquefaction and decrease the settlement of structure.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Yoshida, Masaho; Miyajima, Masakatsu; and Numata, Atsunori, "Liquefaction Countermeasure Technique by Using Logs for Carbon Storage Against Global Warming" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 24.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session04/24
Included in
Liquefaction Countermeasure Technique by Using Logs for Carbon Storage Against Global Warming
San Diego, California
Global warming is one of the most serious problems which faced by civil engineers in this century. Because a wood can store carbon within itself, the utilization of wood in the construction projects may contribute to the mitigation of global warming. The technique of ground improvement by installing logs into loose sand layer as a countermeasure against soil liquefaction was proposed in this study. The logs had been used as pile foundation until 1950's in Japan. However, as the wood has high possibility of a decrease in strength by decay, the utilization of wood become minority in the construction projects. First, since a lot of former wooden piles were found at the riverbed of the Asuwa River in Japan in 2005, the soundness of wood was evaluated. From the test results, it was confirmed that the level of decay was extremely low and the compression strength exceeded the allowable stress of wood pile, though they were buried under the riverbed for 59 years. Second, small scale shaking table tests in a 1-g gravity field were carried out using a composite ground which was made of loose saturated sand layer and the improved ground by piling with logs. It was clarified that the logs installed in liquefiable soil layer could increase the resistance of ground against liquefaction and decrease the settlement of structure.
