SHEAR STRENGTH CHARACTERISTICS OF INTERFACES BETWEEN GCLS AND EMBANKMENT SOILS OF SMALL EARTH DAMS
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- SHIGEMOTO Rintaro
- 神戸大学大学院農学研究科 食料共生システム学専攻（〒657-8501 兵庫県神戸市灘区六甲台町1-1）
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- SAWADA Yutaka
- 神戸大学大学院農学研究科 食料共生システム学専攻（〒657-8501 兵庫県神戸市灘区六甲台町1-1）
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- MAKI Riku
- 神戸大学大農学部 食料環境システム学科（〒657-8501 兵庫県神戸市灘区六甲台町1-1）
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- KAWABATA Toshinori
- 神戸大学大学院農学研究科 食料共生システム学専攻（〒657-8501 兵庫県神戸市灘区六甲台町1-1）
Bibliographic Information
- Other Title
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- ベントナイト系遮水シートとため池堤体土のせん断強度特性
- ベントナイトケイシャスイ シート ト タメイケテイタイド ノ センダンキョウド トクセイ
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Abstract
In the repair work for aging embankments of small earth dams, the installation of geosynthetic clay liners (GCLs) has been proposed as an alternative solution of constructing the sloping core zone. However, the design standard has not yet been established due to limited investigation on the mechanical characteristics of GCLs laid in small earth dams. In this study, direct shear tests were conducted on needle-punched GCL/mixed soil simulating embankment soil interfaces. It is revealed that extrusion of powdered bentonite from hydrated GCLs is observed on the interface between woven geotextile surface and silica sand, which does not cause the reduction of shear strength under low confining pressure.
Journal
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- Geosynthetics Engineering Journal
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Geosynthetics Engineering Journal 32 (0), 73-, 2017
Japan Chapter of International Geosynthetics Society
