SELECTION OF SUBGRADE STABILIZATION MATERIAL IN KYUSHU REGION
九州地方の土質と路床安定処理材の選定
Kyushu region has been the geo-history of volcanic activity. Therefore, its geographical and geological features are complicated. Soils originated from volcanic ash are widely distributed, for example, “Sirasu”, “Bora”, and “Kuroboku soil, Akaboku, ” etc. including much organic materials. The alluvial soils in river basin and well-known “Ariake clay” with thick layer are distributed. As above mentioned, the some special soils are distributed in this region. In case of the purpose for the subgrade of road and/or foundation of structure are considered on the sites, the considering about judgment of physical properties of soil and the appropriate method for stabilization become very important. This report proposes a stabilizing method obtained from following researches; (1) the arrangement of a lot of data based on soil test results in the laboratory which test samples were collected from various areas in Kyushu over many years, (2) a method for selection of stabilization material based on soil characteristics and its necessary amount, (3) the restrictive countermeasure for eluting hexavalent chromium when cement system is used as stabilizing material. 九州地方には活発な火山活動の歴史があり，地形や地質が複雑で，黒ぼくや赤ぼくなど多量の有機物を含む火山灰由来の土壌が広く分布している．また，河川流域には多くの沖積平野が存在し，有明粘土などの厚い軟弱地盤が形成されるなど，九州各地にはさまざまな軟弱土が存在する．そのため，現場で路床や基礎地盤を構築する際には，土質の良否の判断や，適切な安定処理方法の設定が重要となる．本報告では，当試験所に長年蓄積されてきた九州各地からの依頼試験に基づくデータを整理して，さまざまな土質に適した安定処理材の選定の考え方や，所要量の目安について明らかにするとともに，セメント系安定材を用いる場合に必要となる六価クロム溶出規制対応等から，望ましいと考える安定処理について述べたものである．
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/21856559
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Authors:
- HARADA, Masayuki
- YOSHINAKA, Tamotsu
- Publication Date: 2013
Language
- English
- Japanese
Media Info
- Media Type: Web
- Pagination: pp I_215-I_219
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Serial:
- Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)
- Volume: 69
- Issue Number: 3
- Publisher: Japan Society of Civil Engineers
- ISSN: 2185-6559
- Serial URL: https://www.jstage.jst.go.jp/browse/jscejpe/-char/en
Subject/Index Terms
- TRT Terms: Cement; Soil tests; Soils; Stability (Mechanics); Subgrade materials; Volcanoes
- Geographic Terms: Kyushu (Japan)
- Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I30: Materials;
Filing Info
- Accession Number: 01545378
- Record Type: Publication
- Source Agency: Japan Science and Technology Agency (JST)
- Files: TRIS, JSTAGE
- Created Date: Nov 26 2014 3:05PM