SHAKING TABLE TESTS AND NUMERICAL ANALYSIS ON LOG PILING AS A LIQUEFACTION COUNTERMEASURE FOR EXISTING HOUSES

• MIWA Shigeru

  飛島建設

• YOSHIDA Masaho

  福井工業高等専門学校

• MURATA Takumi

  飛島建設技術研究所

• NUMATA Atsunori

  飛島建設エンジニアリング部

Bibliographic Information

Other Title

• 丸太打設による既設戸建て住宅の液状化対策の小型振動実験および数値解析による検討

Abstract

 The 2011 Great East Japan Earthquake caused significant soil liquefaction, and many residences were damaged as a result of associated settlement and inclination. This highlighted the importance of seismic countermeasures for small-scale structures. One such measure involves driving logs into the ground to add density. As trees store carbon during growth, logs placed underground below the water table are not prone to deterioration. Based on this characteristic, subterranean log piling represents a dual measure against both global warming and liquefaction. Since log piles can be set only in ground around existing houses rather than directly beneath them, the effect of the resulting densification is limited. However, rigidity added using this approach and the associated partial densification of soil can be expected to have a certain effect in suppressing ground deformation. In this study, shaking table tests were carried out to investigate the effect of log piles placed around existing houses. Also, numerical analysis was conducted to clarify the effects of this technique. As a result, it is found that the settlements and tilts of houses were mitigated by this method.

Journal

• Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

  Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 72 (4), I_117-I_128, 2016

  Japan Society of Civil Engineers

Keywords

• log
• liquefaction countermeasure
• existing residential house
• densification

Details

• CRID: 1390001205348988672
• NII Article ID: 130005152680
• DOI: 10.2208/jscejseee.72.i_117
• ISSN: 21854653
• Web Site: https://www.jstage.jst.go.jp/article/jscejseee/72/4/72_I_117/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed