EFFECT EVALUATION OF FINE FRACTION ON MECHANICAL CHARACTERISTICS OF UNSATURATED RAILROAD BALLAST
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- ISHIKAWA Tatsuya
- 北海道大学 大学院工学研究院
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- MATSUTANI Shingo
- 北海道大学 大学院工学院
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- TOKORO Tetsuya
- 苫小牧工業高等専門学校 創造工学科
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- NAKAMURA Takahisa
- （公財）鉄道総合技術研究所 軌道技術研究部
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- MOMOYA Yoshitsugu
- （公財）鉄道総合技術研究所 軌道技術研究部
Bibliographic Information
- Other Title
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- 不飽和鉄道バラストの力学特性に及ぼす細粒分の影響評価
- フホウワ テツドウ バラスト ノ リキガク トクセイ ニ オヨボス サイリュウ ブン ノ エイキョウ ヒョウカ
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Abstract
This paper evaluates the synergistic effects of water content and fine fraction on shear behavior of unsaturated fouled ballast by performing a series of monotonic loading and repeated loading triaxial compression tests and water retention tests on fresh and fouled ballasts with different water contents. As the results, it was revealed that the soil-water characteristic curves and relationships between degree of saturation and peak shear strength were seriously affected by intrusion of fouling materials into fresh ballast, and that the decreasing trend of peak strength becomes more remarkable in such a case where both water content and fine fraction increase. These indicate that for the precise prediction of the long-term performance of ballasted track and the mechanical behavior of railroad ballast under repeated loads, it is important to take into account the synergistic effects of water content and fine fraction on the deformation-strength characteristics of fouled ballast.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)
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Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering) 72 (3), I_151-I_158, 2016
Japan Society of Civil Engineers
