Evaluation of in-situ compressive stiffness of liquefied-stabilized soil reinforced with fiber

• Duong Hung Quang

  Division of Engineering, Muroran Institute of Technology

• Kohata Yukihiro

  Division of Engineering, Muroran Institute of Technology

• Ozaki Keita

  Division of Engineering, Muroran Institute of Technology

• Abiru Saori

  CTI Engineering Co., Ltd.

抄録

In this study, evaluation of in-situ compressive stiffness of backfilling ground reinforced with fiber was discussed. A model ground made at the test field by backfilling with Liquefied Stabilized Soil (LSS) reinforced with fiber amount of 0 and 20 kg/m³ was subjected to portable Falling Weight Deflectometer (FWD) tests at curing time of 28, 56 and 84 days, respectively. The stiffness was estimated by Young’s modulus E_P.FWD calculated from K_P.FWD-value as the coefficient of subgrade reaction. In parallel, in order to obtain the tangent Young’s modulus E_tan in deviator stress and axial strain (q -e_a) curve, a series of Consolidated–Undrained triaxial compression tests under the conditions at constant strain rate, constant deviator stress (partial creep test), and changed strain rate during monotonic loading have been carried out for specimens prepared by trimming LSS retrieved from the model ground by block sampling. Based on the test results, the relationship between the E_P.FWD and E_tan was discussed. It is considered that the K_P.FWD-value is able to estimate the stiffness of backfilling ground by LSS reinforced with fiber.

収録刊行物

• Japanese Geotechnical Society Special Publication

  Japanese Geotechnical Society Special Publication 2 (66), 2258-2263, 2016

  公益社団法人 地盤工学会

キーワード

• liquefied stabilized soil
• fiber
• backfilling ground
• in-situ compressive stiffness

詳細情報

• CRID: 1390282680740193152
• NII論文ID: 130005124254
• DOI: 10.3208/jgssp.igs-41
• ISSN: 21888027
• Web Site: https://www.jstage.jst.go.jp/article/jgssp/2/66/2_IGS-41/_pdf
• 本文言語コード: en
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